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Zhao L, Xiao PP, Wang Y, Lu Y, Karim TM, Gies H, Yokoi T. Modulation of Al Distribution in High-Silica ZSM-5 Zeolites for Enhancing Catalytic Performance. ACS Appl Mater Interfaces 2024; 16:17701-17714. [PMID: 38546502 DOI: 10.1021/acsami.4c02311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
The spatial distribution of framework Al (AlF) has been one of the important factors that affect the catalytic properties of zeolites in diverse chemical reactions; however, the synthesis of high-silica zeolites with special AlF distribution remains a challenge. In this study, we successfully synthesized high-silica ZSM-5 zeolites with a unique AlF distribution by employing pentaerythritol (PET) as an additive in the presence of a few tetrapropylammonium hydroxide (TPAOH). The results demonstrated that the introduction of PET led to a higher proportion of Al atoms located at the sinusoidal and/or straight channels. It was observed that the addition of PET prevented the interaction between TPA+ and tetrahedral [AlO4]- during the crystallization process, resulting in enhanced availability of TPA species in the form of ion-paired TPA+. This effect leads to AlF atoms dominantly distributed away from the intersection and located in narrow channels, where acidic sites more effectively inhibit hydrogen transfer and coke formation. In the reaction of dimethyl ether (DME) to olefins, the catalyst with a unique Al distribution exhibited a significant prolonged catalytic lifetime, surpassing traditional TPA-ZSM-5 by more than 2-fold and maintaining DME conversion above 90% for a maximum of 148 h. The results of multiple pulse experiments also showed that these PET-assisted ZSM-5 zeolites significantly enhanced the selectivity of propene and butene. This approach provides an effective strategy to regulate AlF distribution in high-silica ZSM-5 catalysts with the assistance of neutral alcohol. It holds great potential for application in the synthesis of other high-silica zeolites, thereby enriching the diversity of zeolite catalysis.
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Affiliation(s)
- Liang Zhao
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Pei-Pei Xiao
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Yong Wang
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- iPEACE223 Inc., Konwa Building, Tsukiji, Chuo-ku, Tokyo 1-12-22, Japan
| | - Yao Lu
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Tahta Muslim Karim
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Hermann Gies
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Toshiyuki Yokoi
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
- iPEACE223 Inc., Konwa Building, Tsukiji, Chuo-ku, Tokyo 1-12-22, Japan
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2
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Fang J, Zhang B, Fan Y, Liu M, Xu Q, Huang Y, Zhang H. Optimizing invasive plant biomass valorization: Deep eutectic solvents pre-treatment coupled with ZSM-5 catalyzed fast pyrolysis for superior bio-oil quality. Bioresour Technol 2024; 400:130652. [PMID: 38575096 DOI: 10.1016/j.biortech.2024.130652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 02/24/2024] [Accepted: 04/01/2024] [Indexed: 04/06/2024]
Abstract
The primary objective of this study is to explore the application of a deep eutectic solvent, synthesized from lactic acid and choline chloride, in combination with a pre-treatment involving ZSM-5 catalytic fast pyrolysis, aimed at upgrading the quality of bio-oil. Characterization results demonstrate a reduction in lignin content post-treatment, alongside a significant decrease in carboxyls and carbonyls, leading to an increase in the C/O ratio and noticeable enhancement in crystallinity. During catalytic fast pyrolysis experiments, the pre-treatment facilitates the production of oil fractions, achieving yields of 54.53% for total hydrocarbons and 39.99% for aromatics hydrocarbons under optimized conditions. These findings validate the positive influence of the deep eutectic solvent pre-treatment combined with ZSM-5 catalytic fast pyrolysis on the efficient production of bio-oil and high-value chemical derivatives. .
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Affiliation(s)
- Jie Fang
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing, Jiangsu 210096, China
| | - Bo Zhang
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing, Jiangsu 210096, China.
| | - Yulong Fan
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing, Jiangsu 210096, China
| | - Minjia Liu
- School of Chemistry, South China Normal University, Guangzhou, Guangdong 510006, China
| | - Qing Xu
- College of Ocean Engineering and Energy, Guangdong Ocean University, Zhanjiang, Guangdong 524088, China
| | - Yaji Huang
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing, Jiangsu 210096, China
| | - Huiyan Zhang
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing, Jiangsu 210096, China
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3
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Zhang L, Wu Q, Wang Y, Ke L, Fan L, Yang Q, Zhang Q, Zou R, Liu Y, Cobb K, Ruan R, Wang Y. Microwave-assisted catalytic pyrolysis of waste cooking oil to monocyclic aromatics under a bifunctional SiC ball catalyst. J Environ Manage 2024; 357:120748. [PMID: 38552508 DOI: 10.1016/j.jenvman.2024.120748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/28/2024] [Accepted: 03/20/2024] [Indexed: 04/14/2024]
Abstract
Catalytic pyrolysis technology proves to be a highly effective approach for waste cooking oil management. However, high-pressure drops and easy deactivation of powder catalysts hinder the industrialization of this technology. In this study, a bifunctional SiC ball (ZSM-5/SiC ball structured) catalyst was prepared to produce monocyclic aromatics. Bifunctional SiC ball catalyst demonstrates notable microwave-responsive properties and remarkable catalytic efficacy. Results showed that the content of monocyclic aromatics under BFSB catalysis with microwave heating was the highest. Weight hourly space velocity is no longer one of the main factors affecting microwave-assisted catalytic pyrolysis under bifunctional SiC ball catalyst. Monocyclic aromatics content did not decrease significantly and was still higher than 86% when space velocity increased from 30 h-1 to 360 h-1. The highest space velocity could only be 180 h-1 under Powder ZSM-5, and the content of the monocyclic aromatics dropped rapidly to 67.68%. Furthermore, even after five operating cycles, the content of monocyclic aromatics with bifunctional SiC ball catalyst continues to surpass the initial content observed with Powder ZSM-5 at 500 °C and 180 h-1. Related characterizations revealed that coking is the primary cause of catalyst deactivation for both catalyst types; however, the bifunctional SiC ball catalyst exhibits a 29.1% lower occurrence of polyaromatic coke formation compared to Powder ZSM-5.
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Affiliation(s)
- Letian Zhang
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Qiuhao Wu
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Yuanyuan Wang
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Linyao Ke
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Liangliang Fan
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources & Environment, Nanchang University, Nanchang 330031, China
| | - Qi Yang
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Qihang Zhang
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Rongge Zou
- Department of Biological Systems Engineering, Washington State University, Richland, WA 99354-1671, USA
| | - Yuhuan Liu
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Krik Cobb
- Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul, MN 55112, USA
| | - Roger Ruan
- Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul, MN 55112, USA
| | - Yunpu Wang
- State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China.
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4
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Zhao M, Wang X, Xu J, Li Y, Wang X, Chu X, Wang K, Wang Z, Zhang LL, Feng J, Song S, Zhang H. Strengthening the Metal-Acid Interactions by Using CeO 2 as Regulators of Precisely Placing Pt Species in ZSM-5 for Furfural Hydrogenation. Adv Mater 2024:e2313596. [PMID: 38408470 DOI: 10.1002/adma.202313596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 02/18/2024] [Indexed: 02/28/2024]
Abstract
Understanding the synergism between the metal site and acid site is of great significance in boosting the efficiency of bi-functional catalysts in many heterogeneous reactions, particularly in biomass upgrading. Herein, a "confined auto-redox" strategy is reported to fix CeO2 -anchored Pt atoms on the inner wall of a ZSM-5 cage, achieving the target of finely controlling the placements of the two active sites. Compared with the conventional surface-supported counterpart, the encapsulated Pt/CeO2 @ZSM-5 catalyst possesses remarkably-improved activity and selectivity, which can convert >99% furfural into cyclopentanone with 97.2% selectivity in 6 h at 160 °C. Besides the excellent catalytic performance, the ordered metal-acid distribution also makes such kind of catalyst an ideal research subject for metal-acid interactions. The following mechanization investigation reveals that the enhancement is strongly related to the unique encapsulation structure, which promotes the migration of the reactants over different active sites, thereby contributing to the tandem reaction.
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Affiliation(s)
- Meng Zhao
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Xiao Wang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Jing Xu
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Yuou Li
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Xiaomei Wang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Xiang Chu
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Ke Wang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Zijian Wang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Ling-Ling Zhang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Jing Feng
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Shuyan Song
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Hongjie Zhang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
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5
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Saini S, Oluokun T, Sharma B, Verma A, Vorontsov A, Smirniotis PG, Singh R, Viswanadham N, Kumar U. Cr- and Ga-Modified ZSM-5 Catalyst for the Production of Renewable BTX from Bioethanol. Chempluschem 2024:e202300572. [PMID: 38340361 DOI: 10.1002/cplu.202300572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 02/12/2024]
Abstract
Light aromatics (benzene, toluene, and xylene, collectively known as BTX) are essential commodity chemicals in the petrochemical industry. The present study examines the aromatization of bioethanol with Cr- and Ga-modified ZSM-5. Both Cr and Ga were incorporated by the ion-exchange method. Cr-modified ZSM-5 outperforms the Ga-modified ZSM-5 and H-ZSM-5 catalysts. Cr-H-ZSM-5 almost doubled the carbon yield of aromatics compared to H-ZSM-5 at an optimum reaction temperature of 450 °C. Cr-H-ZSM-5 produced aromatics with a yield of ~40 %. The effect of dilution in feed on BTX production is also studied. Cr-H-ZSM-5 was found to be more active than H-ZSM-5. Complete ethanol conversion was obtained with both pure and dilute bioethanol. The Bronsted-Lewis acid (BLA) pair formed after metal incorporation is responsible for dehydrogenation followed by aromatization, leading to increased aromatic production.
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Affiliation(s)
- Swati Saini
- CSIR-Indian Institute of Petroleum, Dehradun, 248005, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Tolulope Oluokun
- CSIR-Indian Institute of Petroleum, Dehradun, 248005, India
- Department of Chemistry, University of Ibadan, Ibadan, 200005, Nigeria
| | - Bhawna Sharma
- CSIR-Indian Institute of Petroleum, Dehradun, 248005, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Akash Verma
- CSIR-Indian Institute of Petroleum, Dehradun, 248005, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | | | - Panagiotis G Smirniotis
- Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH-45221-0012, USA
| | - Raghuvir Singh
- CSIR-Indian Institute of Petroleum, Dehradun, 248005, India
| | - Nagabhatla Viswanadham
- CSIR-Indian Institute of Petroleum, Dehradun, 248005, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Umesh Kumar
- CSIR-Indian Institute of Petroleum, Dehradun, 248005, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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6
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Wu R, Lv P, Liu B, Bai Y, Wang J, Wei J, Su W, Xu G, Bao W, Yu G. Aromatics production from relay catalytic pyrolysis of cow manure using Ru/C and ZSM-5 dual catalysts synthesized from coal gasification fine slag. J Environ Manage 2023; 348:119356. [PMID: 37883835 DOI: 10.1016/j.jenvman.2023.119356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 09/25/2023] [Accepted: 10/14/2023] [Indexed: 10/28/2023]
Abstract
Resource utilization of solid waste can aid in gradual substitution of fossil fuels while achieving waste recycling. In this study, residual carbon and ash slag from the coal gasification fine slag were separated by froth flotation, and then was used to prepare Ru/C and ZSM-5 dual catalysts with carbon-rich and ash-rich components as raw materials, respectively. The performance of two catalysts for catalytic upgrading of volatiles from pyrolysis of cow manure (CM) to produce light aromatic hydrocarbons was systematically investigated. The direct pyrolysis products of CM mainly included alcohols, ketones, ethers, and other oxygen-containing compounds. When ZSM-5 was used as the catalyst, the yield of monocyclic aromatic hydrocarbons (MAHs) increased significantly due to the better catalytic cracking and aromatization abilities of ZSM-5 catalyst. However, the yield of phenols in the pyrolysis products improved when Ru/C was used as the catalyst due to the cleavage effect of Ru/C on the C-O bond. When Ru/C and ZSM-5 were used as dual catalysts in relay catalytic pyrolysis of volatiles, the increase in MAHs yield in the pyrolysis product was higher than the total increase obtained under Ru/C and ZSM-5 single catalysis. The possible pathways for the generation of MAHs from CM under Ru/C and ZSM-5 relay catalytic pyrolysis were revealed by the pyrolysis experiment performed on model compounds.
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Affiliation(s)
- Ruofei Wu
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China
| | - Peng Lv
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China.
| | - Bin Liu
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China
| | - Yonghui Bai
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China
| | - Jiaofei Wang
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China
| | - Juntao Wei
- Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Weiguang Su
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China
| | - Guangyu Xu
- Shandong Yankuangguotuo Science & Engineering Co., Ltd., Zoucheng, 273500, China
| | - Weina Bao
- Shandong Yankuangguotuo Science & Engineering Co., Ltd., Zoucheng, 273500, China
| | - Guangsuo Yu
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China; Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai, 200237, China.
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Shelyapina MG, Nefedov DY, Antonenko AO, Valkovskiy GA, Yocupicio-Gaxiola RI, Petranovskii V. Nanoconfined Water in Pillared Zeolites Probed by 1H Nuclear Magnetic Resonance. Int J Mol Sci 2023; 24:15898. [PMID: 37958879 PMCID: PMC10648503 DOI: 10.3390/ijms242115898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 10/26/2023] [Accepted: 10/31/2023] [Indexed: 11/15/2023] Open
Abstract
Here, we report the results of our 1H nuclear magnetic resonance study of the dynamics of water molecules confined in zeolites (mordenite and ZSM-5 structures) with hierarchical porosity (micropores in zeolite lamella and mesopores formed by amorphous SiO2 in the inter-lamellar space). 1H nuclear magnetic resonance (NMR) spectra show that water experiences complex behavior within the temperature range from 173 to 298 K. The temperature dependence of 1H spin-lattice relaxation evidences the presence of three processes with different activation energies: freezing (about 30 kJ/mol), fast rotation (about 10 kJ/mol), and translational motion of water molecules (23.6 and 26.0 kJ/mol for pillared mordenite and ZSM-5, respectively). For translational motion, the activation energy is markedly lower than for water in mesoporous silica or zeolites with similar mesopore size but with disordered secondary porosity. This indicates that the process of water diffusion in zeolites with hierarchical porosity is governed not only by the presence of mesopores, but also by the mutual arrangement of meso- and micropores. The translational motion of water molecules is determined mainly by zeolite micropores.
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Affiliation(s)
- Marina G. Shelyapina
- Faculty of Physics, Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russia; (D.Y.N.); (A.O.A.); (G.A.V.)
| | - Denis Y. Nefedov
- Faculty of Physics, Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russia; (D.Y.N.); (A.O.A.); (G.A.V.)
| | - Anastasiia O. Antonenko
- Faculty of Physics, Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russia; (D.Y.N.); (A.O.A.); (G.A.V.)
| | - Gleb A. Valkovskiy
- Faculty of Physics, Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russia; (D.Y.N.); (A.O.A.); (G.A.V.)
| | - Rosario I. Yocupicio-Gaxiola
- Tecnológico Nacional de México, Instituto Tecnológico Superior de Guasave, Carretera a La Brecha Sin Número, Ejido Burrioncito, Guasave 81149, Sinaloa, Mexico;
| | - Vitalii Petranovskii
- Center for Nanoscience and Nanotechnology, National Autonomous University of Mexico (CNyN, UNAM), Ensenada 22860, Baja California, Mexico;
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8
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Zhang D, Huang K, Xia Y, Cao H, Dai L, Qu K, Xiao L, Fan Y, Xu Z. Two-Dimensional MFI-Type Zeolite Flow Battery Membranes. Angew Chem Int Ed Engl 2023; 62:e202310945. [PMID: 37670427 DOI: 10.1002/anie.202310945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 08/24/2023] [Accepted: 09/04/2023] [Indexed: 09/07/2023]
Abstract
Vanadium flow battery (VFB) is one of the most reliable stationary electrochemical energy-storage technologies, and a membrane with high vanadium resistance and proton conductivity is essential for manufacturing high-performance VFBs. In this study, a two-dimensional (2D) MFI-type zeolite membrane was fabricated from zeolite nanosheet modules, which displayed excellent vanadium resistance (0.07 mmol L-1 h-1 ) and proton conductivity (0.16 S cm-1 ), yielding a coulombic efficiency of 93.9 %, a voltage efficiency of 87.6 %, and an energy efficiency of 82.3 % at 40 mA cm-2 . The self-discharge period of a VFB equipped with 2D MFI-type zeolite membrane increased up to 116.2 h, which was significantly longer than that of the commercial perfluorinated sulfonate membrane (45.9 h). Furthermore, the corresponding battery performance remained stable over 1000 cycles (>1500 h) at 80 mA cm-2 . These findings demonstrate that 2D MFI-type membranes are promising ion-conductive membranes applicable for stationary electrochemical energy-storage devices.
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Affiliation(s)
- Dezhu Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
- Suzhou Laboratory, No. 388 Ruoshui Road, Suzhou, 215123, China
| | - Kang Huang
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
- Suzhou Laboratory, No. 388 Ruoshui Road, Suzhou, 215123, China
| | - Yongsheng Xia
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Hongyan Cao
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Liheng Dai
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, No. 130 Meilong Road, Shanghai, 200237, China
| | - Kai Qu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, No. 130 Meilong Road, Shanghai, 200237, China
| | - Lan Xiao
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Yiqun Fan
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
- Suzhou Laboratory, No. 388 Ruoshui Road, Suzhou, 215123, China
| | - Zhi Xu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, No. 130 Meilong Road, Shanghai, 200237, China
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9
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Cueto J, Pérez-Martin G, Amodio L, Paniagua M, Morales G, Melero JA, Serrano DP. Upgrading of solid recovered fuel (SRF) by dechlorination and catalytic pyrolysis over nanocrystalline ZSM-5 zeolite. Chemosphere 2023; 339:139784. [PMID: 37567278 DOI: 10.1016/j.chemosphere.2023.139784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/20/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023]
Abstract
Globally increasing concern related to municipal solid waste generation is encouraging research efforts on developing alternative routes to valorize mixed refused wastes. In this way, catalytic pyrolysis is emerging as an interesting and efficient technology due to its great flexibility in terms of feedstock. In the current work, upgrading of a Solid Recovered Fuel (SRF) has been investigated by catalytic pyrolysis over nanocrystalline ZSM-5 zeolite (n-ZSM-5), paying special attention to dechlorination effects due to the high Cl content of the raw waste. Thus, pretreatment of the SRF by water washing and mild thermal processing allows for a significant reduction of the Cl concentration. Regarding the catalytic pyrolysis step, the best conditions correspond with a temperature of 400 °C in the catalyst bed and 0.50 catalyst/SRF mass ratio, which lead to ca. 30 wt% oil yield (rich in aromatic hydrocarbons) together with about 40 wt% gas yield (rich in C3-C4 olefins). Accordingly, these products could find use as raw chemicals or for the production of advanced fuels. In addition, zeolite reutilization has been tested for several cycles, denoting a progressive modification of the products distribution because of coke deposition. However, an almost total recovery of the n-ZSM-5 zeolite catalytic performance is achieved after regeneration by air calcination, affording the production of an oil fraction with a Cl content as low as 40 ppm.
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Affiliation(s)
- J Cueto
- Thermochemical Processes Unit, IMDEA Energy Institute, Avda. Ramón de La Sagra, 3, 28935, Móstoles, Madrid, Spain
| | - G Pérez-Martin
- Thermochemical Processes Unit, IMDEA Energy Institute, Avda. Ramón de La Sagra, 3, 28935, Móstoles, Madrid, Spain
| | - L Amodio
- Thermochemical Processes Unit, IMDEA Energy Institute, Avda. Ramón de La Sagra, 3, 28935, Móstoles, Madrid, Spain; Chemical and Environmental Engineering Group, Universidad Rey Juan Carlos, Tulipán s/n, 28933, Móstoles, Madrid, Spain
| | - M Paniagua
- Chemical and Environmental Engineering Group, Universidad Rey Juan Carlos, Tulipán s/n, 28933, Móstoles, Madrid, Spain
| | - G Morales
- Chemical and Environmental Engineering Group, Universidad Rey Juan Carlos, Tulipán s/n, 28933, Móstoles, Madrid, Spain
| | - J A Melero
- Chemical and Environmental Engineering Group, Universidad Rey Juan Carlos, Tulipán s/n, 28933, Móstoles, Madrid, Spain
| | - D P Serrano
- Thermochemical Processes Unit, IMDEA Energy Institute, Avda. Ramón de La Sagra, 3, 28935, Móstoles, Madrid, Spain; Chemical and Environmental Engineering Group, Universidad Rey Juan Carlos, Tulipán s/n, 28933, Móstoles, Madrid, Spain.
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10
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Barzallo D, Lazo R, Medina C, Guashpa C, Tacuri C, Palmay P. Synthesis and Application of ZSM-5 Catalyst Supported with Zinc and/or Nickel in the Conversion of Pyrolytic Gases from Recycled Polypropylene and Polystyrene Mixtures under Hydrogen Atmosphere. Polymers (Basel) 2023; 15:3329. [PMID: 37631387 PMCID: PMC10459782 DOI: 10.3390/polym15163329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 07/13/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
Currently, catalytic pyrolysis has become a versatile and highly useful technology in the treatment of different plastic wastes. Thus, the development of selective catalysts to carry out cracking reactions and obtain a greater fraction of the desired products is essential. This study focuses on the synthesis of monometallic (Ni) and bimetallic (Ni-Zn) catalysts supported on ZSM-5 zeolite using an impregnation and co-impregnation method, respectively. The obtained catalysts were characterized by FTIR spectroscopy, N2 adsorption/desorption measurements, scanning electron microscopy (SEM) and energy dispersive X-Ray spectroscopy (EDS), temperature programmed NH3 desorption (TPD-NH3) and thermogravimetric analysis (TGA). In this way, a mixture of polystyrene and polypropylene recycled with a catalyst/plastic waste ratio of 1:500 was used for pyrolysis tests. The best results were obtained using the Ni-Zn/ZSM-5 catalyst, which included better impregnation, increased surface acidity, decreased dispersion and a shorter reaction time in the catalytic pyrolysis process. Under the optimized conditions, catalytic pyrolysis showed an excellent performance to generate hydrocarbons of greater industrial interest.
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Affiliation(s)
- Diego Barzallo
- Facultad Ciencias e Ingeniería, Universidad Estatal de Milagro, Milagro 091050, Ecuador;
- Department of Chemistry, University of Balearic Islands, Cra. Valldemossa 7.5 km, 07122 Palma de Mallorca, Spain
| | - Rafael Lazo
- Facultad Ciencias e Ingeniería, Universidad Estatal de Milagro, Milagro 091050, Ecuador;
| | - Carlos Medina
- Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo ESPOCH, Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador; (C.M.); (C.G.); (C.T.)
| | - Carlos Guashpa
- Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo ESPOCH, Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador; (C.M.); (C.G.); (C.T.)
| | - Carla Tacuri
- Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo ESPOCH, Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador; (C.M.); (C.G.); (C.T.)
| | - Paúl Palmay
- Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo ESPOCH, Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador; (C.M.); (C.G.); (C.T.)
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11
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Luong T, Wang Y, Parmar K, Jiang C, Wang Q, Hu J. Exploring Synergistic Interactions between Polystyrene and Polyethylene. Chempluschem 2023:e202300210. [PMID: 37302980 DOI: 10.1002/cplu.202300210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/02/2023] [Accepted: 06/05/2023] [Indexed: 06/13/2023]
Abstract
An attempt was undertaken to elevate production of aromatic compounds through co-upcycling of polystyrene (PS) and low-density polyethylene (LDPE). The plastics samples were upcycled at 400°C with catalyst H-ZSM-5. Compared to single plastic upcycling, co-upcycling PS and LDPE demonstrated high advantages: lowered reaction temperature (390°C), medium reaction rate (-1.35%/°C), low yield to coke (1.62% or less) and enhanced aromatics yield (42.9-43.5%). In-situ FTIR results demonstrated a constant production of aromatics in the 1:1 mixed plastic while in pure plastics, aromatic production quickly dropped. Compared to single PS upcycling, co-upcycling PS with PE produced more monocyclic aromatic hydrocarbons (MAHs) at close to 43.0% versus 32.5% and less polycyclic aromatic hydrocarbons (PAHs) at 16.8-34.6% versus 49.5%. From these data, the synergy between PS and LDPE were confirmed and the mechanism in which they increased MAHs production was proposed.
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Affiliation(s)
- Thang Luong
- West Virginia University, Department of Chemical and Biomedical Engineering, 26506, Morgantown, UNITED STATES
| | - Yuxin Wang
- West Virginia University, Department of Chemical and Biomedical Engineering, 26506, UNITED STATES
| | - Kaushal Parmar
- West Virginia University, Department of Chemical and Biomedical Engineering, 26506, UNITED STATES
| | - Changle Jiang
- West Virginia University, Department of Chemical and Biomedical Engineering, 26506, UNITED STATES
| | - Qiang Wang
- West Virginia University, Shared Research Facilities, 26506, UNITED STATES
| | - Jianli Hu
- West Virginia University, Chemical & Biomedical Engineering, 395 Evansdale Drive, 26506, Morgnatown, UNITED STATES
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12
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Pirvu F, Covaliu-Mierlă CI, Catrina GA. Removal of Acetaminophen Drug from Wastewater by Fe 3O 4 and ZSM-5 Materials. Nanomaterials (Basel) 2023; 13:nano13111745. [PMID: 37299648 DOI: 10.3390/nano13111745] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/03/2023] [Accepted: 05/10/2023] [Indexed: 06/12/2023]
Abstract
Adsorption of toxic compounds from water using zeolites and magnetite was developed due to the various advantages of their applicability. In the last twenty years, the use of zeolite-based compositions in the form of zeolite/inorganic or zeolite/polymer and magnetite has been accelerated for the adsorption of emergent compounds from water sources. The main adsorption mechanisms using zeolite and magnetite nanomaterials are high surface adsorption, ion exchange capacity and electrostatic interaction. This paper shows the capacity of Fe3O4 and ZSM-5 nanomaterials of adsorbing the emerging pollutant acetaminophen (paracetamol) during the treatment of wastewater. The efficiencies of the Fe3O4 and ZSM-5 in the wastewater process were systematically investigated using adsorption kinetics. During the study, the concentration of acetaminophen in the wastewater was varied from 50 to 280 mg/L, and the maximum Fe3O4 adsorption capacity increased from 25.3 to 68.9 mg/g. The adsorption capacity of each studied material was performed for three pH values (4, 6, 8) of the wastewater. Langmuir and Freundlich isotherm models were used to characterize acetaminophen adsorption on Fe3O4 and ZSM-5 materials. The highest efficiencies in the treatment of wastewater were obtained at a pH value of 6. Fe3O4 nanomaterial presented a higher removal efficiency (84.6%) compared to ZSM-5 nanomaterial (75.4%). The results of the experiments show that both materials have a potential to be used as an effective adsorbents for the removal of acetaminophen from wastewater.
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Affiliation(s)
- Florinela Pirvu
- Faculty of Biotechnical Systems Engineering, Politehnica University of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
- National Research and Development Institute for Industrial Ecology ECOIND, 71-73, Drumul Podu Dambovitei Street, 060652 Bucharest, Romania
| | - Cristina Ileana Covaliu-Mierlă
- Faculty of Biotechnical Systems Engineering, Politehnica University of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Gina Alina Catrina
- National Research and Development Institute for Industrial Ecology ECOIND, 71-73, Drumul Podu Dambovitei Street, 060652 Bucharest, Romania
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13
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Huang L, Wang B, Liu L, Borgna A. Liquid-Phase Dehydration of Glycerol to Acrolein with ZSM-5-Based Catalysts in the Presence of a Dispersing Agent. Molecules 2023; 28:molecules28083316. [PMID: 37110548 PMCID: PMC10143559 DOI: 10.3390/molecules28083316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 04/02/2023] [Accepted: 04/05/2023] [Indexed: 04/29/2023] Open
Abstract
Liquid-phase dehydration of glycerol to acrolein was investigated with solid acid catalysts, including H-ZSM-5, H3PO4-modified H-ZSM-5, H3PW12O40·14H2O and Cs2.5H0.5PW12O40, in the presence of sulfolane ((CH2)4SO2) as a dispersing agent under atmospheric pressure N2 in a batch reactor. High weak-acidity H-ZSM-5, high temperatures and high-boiling-point sulfolane improved the activity and selectivity for the production of acrolein through suppressing the formation of polymers and coke and promoting the diffusion of glycerol and products. Brønsted acid sites were soundly demonstrated to be responsible for dehydration of glycerol to acrolein by infrared spectroscopy of pyridine adsorption. Brønsted weak acid sites favored the selectivity to acrolein. Combined catalytic and temperature-programmed desorption of ammonia studies revealed that the selectivity to acrolein increased as the weak-acidity increased over the ZSM-5-based catalysts. The ZSM-5-based catalysts produced a higher selectivity to acrolein, while the heteropolyacids resulted in a higher selectivity to polymers and coke.
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Affiliation(s)
- Lin Huang
- Institute of Sustainability for Chemicals, Energy and Environment, Agency for Science, Technology and Research, 1 Pesek Road, Jurong Island, Singapore 627833, Singapore
| | - Bo Wang
- Institute of Sustainability for Chemicals, Energy and Environment, Agency for Science, Technology and Research, 1 Pesek Road, Jurong Island, Singapore 627833, Singapore
| | - Licheng Liu
- Institute of Sustainability for Chemicals, Energy and Environment, Agency for Science, Technology and Research, 1 Pesek Road, Jurong Island, Singapore 627833, Singapore
| | - Armando Borgna
- Institute of Sustainability for Chemicals, Energy and Environment, Agency for Science, Technology and Research, 1 Pesek Road, Jurong Island, Singapore 627833, Singapore
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14
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Zhou Z, Wang X, Li J, Gao Y, Yu R, Jiang R. One-pot Synthesis of Phosphorus-modified ZSM-5 Zeolite by Solid-state Method and its MTO Catalytic Performance. Chemistry 2023; 29:e202203095. [PMID: 36478597 DOI: 10.1002/chem.202203095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 12/02/2022] [Accepted: 12/06/2022] [Indexed: 12/12/2022]
Abstract
The traditional hydrothermal synthesis strategy of ZSM-5 zeolite is energy-consumption accompanying by pollution issues. Herein, phosphorus-modified layered ZSM-5 zeolites (PZ) were obtained by one-pot synthesis under solvent-free conditions. The synthesized samples were fully characterized by XRD, SEM, BET, NH3 -TPD and FTIR. The effect of phosphorus addition on the morphology and catalytic activity of ZSM-5 was investigated. The results showed that phosphorus-modified ZSM-5 zeolites exhibited higher light olefin (ethylene and propylene) selectivity (above 50 %) and longer catalytic lifetime (33 h) in methanol to olefin (MTO) reaction when the weight hourly space velocity was 4 h-1 . Phosphorus-modified ZSM-5 zeolite synthesized by in situ solvent-free method, which not only reduced the discharge of sewage but also showed a simple method to realize the introduction of phosphorous species, which provided a new idea for phosphorus modification of ZSM-5 zeolite.
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Affiliation(s)
- Zihan Zhou
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116 (P. R., China
| | - Xingwen Wang
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116 (P. R., China
| | - Junjie Li
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116 (P. R., China
| | - Yu Gao
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116 (P. R., China
| | - Rui Yu
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116 (P. R., China
| | - Rongli Jiang
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116 (P. R., China
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15
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Cheng S, Lu S, Liu X, Li G, Wang F. Enhanced Activity of Alkali-Treated ZSM-5 Zeolite-Supported Pt-Co Catalyst for Selective Hydrogenation of Cinnamaldehyde. Molecules 2023; 28:molecules28041730. [PMID: 36838718 PMCID: PMC9965589 DOI: 10.3390/molecules28041730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/09/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023] Open
Abstract
A bimetallic Pt8Co1 supported on alkali-treated ZSM-5 zeolite (ZSM-5-AT) was prepared through the impregnation method. The structure and surface properties of the catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N2-sorption and X-ray photoelectron spectroscopy (XPS) as well as temperature-programmed desorption of NH3 (NH3-TPD) and temperature-programmed reduction of H2 (H2-TPR). The TEM images present that the bimetallic Pt8Co1 nanoparticles with a mean particle size of 4-6 nm were uniformly dispersed on the alkali-treated ZSM-5 zeolite. The bimetallic Pt8Co1/ZSM-5-AT catalyst exhibited an extraordinary COL selectivity of 65% at a >99% CAL conversion efficiency, which showed a much higher catalytic performance (including the activity and selectivity) than the monometallic Pt/ZSM-5-AT and Co/ZSM-5-AT catalysts in the selective hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL) using hydrogen as reducing agent. The high catalytic activity of the bimetallic catalyst was attributed to the higher electron density of Pt species and more acidic sites of the alkali-treated ZSM-5 zeolite support. The recovery test showed no obvious loss of its initial activity of the Pt8Co1/ZSM-5-AT catalyst for five times.
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Affiliation(s)
- Shibo Cheng
- Pittsburgh Institute (SCUPI), Sichuan University, Chengdu 610065, China
| | - Shan Lu
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou 213164, China
| | - Xiang Liu
- Hunan Drug Inspection Center, Hunan Institute for Drug Control, Changsha 410013, China
| | - Gao Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Correspondence: (G.L.); (F.W.)
| | - Fei Wang
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical and Engineering, Changzhou University, Changzhou 213164, China
- Correspondence: (G.L.); (F.W.)
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16
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Hahm YE, Kweon S, Park MB, Park YD. Highly Sensitive and Selective Organic Gas Sensors Based on Nitrided ZSM-5 Zeolite. ACS Appl Mater Interfaces 2023; 15:7196-7203. [PMID: 36695727 DOI: 10.1021/acsami.2c18498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
For next-generation gas sensors, conductive polymers have strong potential for overcoming the existing deficiencies of conventional inorganic sensors based on metallic oxides. However, the signal of organic gas sensors is inferior to that of inorganic metal oxide gas sensors because of organic gas sensors' poor charge carrier transport. Herein, the combination of an organic transistor-type gas sensor and a zeolite with strong gas-adsorbing properties is proposed and experimentally demonstrated. Among the various investigated zeolites, ZSM-5 with ∼5.5 Å pore openings enhanced the adsorption for small gas molecules when combined with a polymer active layer, where it provided a pathway for gas molecules to penetrate the zeolite channels. Moreover, nitrided ZSM-5 (N-ZSM-5) enhanced the sensing performance of NO2 molecules selectively because N in the N-ZSM-5 framework strongly interacted with NO2 molecules. These results open the possibility for zeolite-modified organic gas sensors that selectively adsorb target gas molecules via heteroatoms substituted into the zeolite framework.
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Affiliation(s)
- Yea Eun Hahm
- Department of Energy and Chemical Engineering, Incheon National University, Incheon 22012, Republic of Korea
| | - Sungjoon Kweon
- Department of Energy and Chemical Engineering, Incheon National University, Incheon 22012, Republic of Korea
| | - Min Bum Park
- Department of Energy and Chemical Engineering, Incheon National University, Incheon 22012, Republic of Korea
| | - Yeong Don Park
- Department of Energy and Chemical Engineering, Incheon National University, Incheon 22012, Republic of Korea
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17
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Kurzydym I, Garbujo A, Biasi P, Czekaj I. Change in the Nature of ZSM-5 Zeolite Depending on the Type of Metal Adsorbent-The Analysis of DOS and Orbitals for Iron Species. Int J Mol Sci 2023; 24. [PMID: 36834785 DOI: 10.3390/ijms24043374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 02/10/2023] Open
Abstract
Transition-metal-modified zeolites have recently gained the greatest interest among scientists. Ab initio calculations within the density functional theory were used. The exchange and correlation functional was approximated with the Perdew-Burke-Ernzerhof (PBE) functional. Cluster models of ZSM-5 (Al2Si18O53H26) zeolites were used with Fe particles adsorbed above aluminum. The adsorption of three iron adsorbates inside the pores of the ZSM-5 zeolite-Fe, FeO and FeOH-was carried out with different arrangements of aluminum atoms in the zeolite structure. The DOS diagram and the HOMO, SOMO and LUMO molecular orbitals for these systems were analyzed. It has been shown that depending on the adsorbate and the position of aluminum atoms in the pore structure of the zeolite, the systems can be described as insulators or conductors, which significantly affects their activity. The main aim of the research was to understand the behavior of these types of systems in order to select the most efficient one for a catalytic reaction.
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18
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Li Q, Yang H, Chen P, Jiang W, Chen F, Yu X, Su G. Investigation of Catalytic Co-Pyrolysis Characteristics and Synergistic Effect of Oily Sludge and Walnut Shell. Int J Environ Res Public Health 2023; 20:2841. [PMID: 36833538 PMCID: PMC9956203 DOI: 10.3390/ijerph20042841] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/31/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
The co-pyrolysis of oily sludge and walnut shell is a reliable method for solid waste treatment and waste recycling. In this paper, a thermogravimetric analysis was used to study the thermodynamics and synergy effect of oily sludge (OS) and walnut shell (WS) at four heating rates (10, 20, 30, and 40 °C/min) in the temperature range from 50-850 °C. Two model-free methods (FWO and KAS) were used to calculate the activation energy. The results showed that the heating rate had no significant effect on the pyrolysis process. The addition of walnut shell improved the pyrolysis process of the samples. Mixture 1OS3WS had a synergy effect, while other blends showed an inhibitory effect. The synergy effect of co-pyrolysis was strongest when the mass ratio of oily sludge was 25%. The activation energy of the Zn-ZSM-5/25 catalyst was the lowest, and the residual substances were the least, indicating that the Zn-ZSM-5/25 was beneficial to the co-pyrolysis of oily sludge and walnut shell. The analysis of catalytic pyrolysis products by Py-GC/MS found that co-pyrolysis was beneficial to the generation of aromatic hydrocarbons. This study provided a method for the resource utilization of hazardous waste and biomass waste, which was conducive to the production of aromatic chemicals with added value while reducing environmental pollution.
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Affiliation(s)
- Qinghong Li
- School of Chemical and Environmental Engineering, Yangtze University, Jingzhou 434023, China
| | - Huan Yang
- School of Chemical and Environmental Engineering, Yangtze University, Jingzhou 434023, China
| | - Ping Chen
- Drilling and Production Engineering Technology Research Institute of CNPC Chuanqing Drilling Engineering Co., Ltd., Chengdu 710018, China
- National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi’an 710018, China
| | - Wenxue Jiang
- Drilling and Production Engineering Technology Research Institute of CNPC Chuanqing Drilling Engineering Co., Ltd., Chengdu 710018, China
- National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi’an 710018, China
| | - Fei Chen
- CCDC Chuangqing Downhole Technology Company, Xi’an 710018, China
| | - Xiaorong Yu
- CCDC Chuangqing Downhole Technology Company, Xi’an 710018, China
| | - Gaoshen Su
- School of Chemical and Environmental Engineering, Yangtze University, Jingzhou 434023, China
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19
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Yuan N, Tan K, Zhang X, Zhao A, Guo R. Synthesis and adsorption performance of ultra-low silica-to-alumina ratio and hierarchical porous ZSM-5 zeolites prepared from coal gasification fine slag. Chemosphere 2022; 303:134839. [PMID: 35537628 DOI: 10.1016/j.chemosphere.2022.134839] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 04/04/2022] [Accepted: 05/01/2022] [Indexed: 06/14/2023]
Abstract
Since the human consumption of coal is increasingly growing and coal-based solid wastes are discharged in large quantities, the resource utilization of coal-based solid wastes has been paid more attention. In the present work, for the first time, the coal gasification fine slag is subjected to prepare ZSM-5 zeolites with ultra-low n(SiO2)/n(Al2O3) ratios (less than 20) and hierarchical pore structures. The increase in the concentration of the alkaline extract leads to the decrease of the crystallinity, the irregularity of the microscopic morphology, and the decrease of the specific surface area, resulting in the in-situ generation of mesopores within ZSM-5. Moreover, adsorption experiments demonstrate that ZSM-5-2M exhibits the best methylene blue adsorption performance at the pH of 9 with a removal rate of up to 82.07%, and it also has good adsorption performance in simulated real water samples. Furthermore, the adsorption performance of ZSM-5-2M on the malachite green, Rhodamine B, Congo red, and methyl orange has been investigated and it is found to be very effective for the adsorption of cationic dyes, and its adsorption performance for methylene blue and malachite green is reduced in the presence of anions.
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Affiliation(s)
- Ning Yuan
- School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China.
| | - Kaiqi Tan
- School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China
| | - Xinling Zhang
- School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China
| | - Aijing Zhao
- School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China
| | - Rui Guo
- School of Economics and Management, Qilu Normal University, Jinan, 250013, China
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20
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Xia W, Ma C, Huang Y, Li S, Wang X, Chen K, Liu D. Bioethanol Conversion into Propylene over Various Zeolite Catalysts: Reaction Optimization and Catalyst Deactivation. Nanomaterials (Basel) 2022; 12:2746. [PMID: 36014611 PMCID: PMC9414363 DOI: 10.3390/nano12162746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 08/03/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
Catalytic conversions of bioethanol to propylene were investigated over different zeolite catalysts. H-ZSM-5 (SiO2/Al2O3 = 80) was found to be the most effective for propylene production. Furthermore, H-ZSM-5 (SiO2/Al2O3 = 80) was investigated under different variables of catalytic reaction (calcination temperature, feed composition, reaction temperature, and time on stream) for the conversion of ethanol to propylene. The H-ZSM-5(80) catalysts calcined at 600 °C showed the highest propylene yield. The moderate acidic site on ZSM-5 is required for the production of propylene. The activity on ZSM-5 is independent of the ethanol feed composition. H-ZSM-5 catalyst deactivation was observed, owing to dealumination. The highest propylene yield was 23.4% obtained over HZSM-5(80). Propylene, butene, and ≥C5 olefins were formed by parallel reaction from ethylene. Olefins were converted to each paraffin by sequential hydrogenation reaction. HZSM-5(80) catalyst is a promising catalyst not only for ethanol but also for the conversion of bioethanol to light olefins.
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Affiliation(s)
- Wei Xia
- Correspondence: ; Tel.: +86-532-86984615
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21
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Chen G, Li J, Wang S, Han J, Wang X, She P, Fan W, Guan B, Tian P, Yu J. Construction of Single-Crystalline Hierarchical ZSM-5 with Open Nanoarchitectures via Anisotropic-Kinetics Transformation for the Methanol-to-Hydrocarbons Reaction. Angew Chem Int Ed Engl 2022; 61:e202200677. [PMID: 35199436 DOI: 10.1002/anie.202200677] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Indexed: 12/25/2022]
Abstract
We report an anisotropic-kinetics transformation strategy to prepare single-crystalline aluminosilicate MFI zeolites (ZSM-5) with highly open nanoarchitectures and hierarchical porosities. The methodology relies on the cooperative effect of in situ etching and recrystallization on the evolution of pure-silica MFI zeolite (silicalite-1) nanotemplates under hydrothermal conditions. The strategy enables a controllable preparation of ZSM-5 nanostructures with diverse open geometries by tuning the relative rate difference between etching and recrystallization processes. Meanwhile, it can also be extended to synthesize other heteroatom-substituted MFI zeolite nanocages. Compared with conventional ZSM-5 microcrystals, nanocrystals, and nanoboxes, the ZSM-5 nanocages with single-crystalline nature, highly open nanoarchitectures, and hierarchical porosities exhibit remarkably enhanced catalytic lifetime and low coking rate in the methanol-to-hydrocarbons (MTH) reaction.
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Affiliation(s)
- Guangrui Chen
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, 130012, P. R. China
| | - Junyan Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, 130012, P. R. China.,Center for High-resolution Electron Microscopy (CħEM), School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, P.R. China
| | - Sen Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan, 030001, P.R. China
| | - Ji Han
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, 130012, P. R. China
| | - Xingxing Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, 130012, P. R. China
| | - Peihong She
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, 130012, P. R. China.,International Center of Future Science, Jilin University, Qianjin Street 2699, Changchun, 130012, P. R. China
| | - Weibin Fan
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan, 030001, P.R. China
| | - Buyuan Guan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, 130012, P. R. China.,International Center of Future Science, Jilin University, Qianjin Street 2699, Changchun, 130012, P. R. China
| | - Peng Tian
- National Engineering Laboratory for Methanol to Olefins, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Jihong Yu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun, 130012, P. R. China.,International Center of Future Science, Jilin University, Qianjin Street 2699, Changchun, 130012, P. R. China
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22
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Luo W, Wang T, Zhang S, Zhang D, Dong H, Song M, Zhou Z. Catalytic co-pyrolysis of herb residue and polypropylene for pyrolysis products upgrading and diversification using nickel-X/biochar and ZSM-5 (X = iron, cobalt, copper). Bioresour Technol 2022; 349:126845. [PMID: 35158035 DOI: 10.1016/j.biortech.2022.126845] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 06/14/2023]
Abstract
It is very important to find cheap and efficient catalysts for catalytic co-pyrolysis. Catalytic co-pyrolysis of herb residue (HR) and reused polypropylene (PP) using Ni-X/biochar and ZSM-5 (X = Fe, Co, Cu) was performed to produce pyrolysis oil, pyrolysis gas and carbon nanotubes (CNTs) in a two-stage fixed bed reactor. Bimetallic biochar catalysts exhibited higher catalytic activity due to their higher specific surface area (SBET) and more strong acid sites. NiCu/biochar significantly increased the yield of pyrolysis oil by enhancing Fischer-Tropsch synthesis. In addition, the stronger secondary cracking capacity of NiCu/biochar resulted in the highest content of hydrocarbons (80.47%) and C6-C11(61.10%), while the availability of higher content of carbon source gas also facilitated the formation of CNTs and H2 at back-end. The cheap and efficient NiCu/biochar catalyst has great potential in the application of catalytic pyrolysis, which is conducive to the large-scale promotion of biomass pyrolysis technology.
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Affiliation(s)
- Wei Luo
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, PR China; School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China
| | - Tao Wang
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China
| | - Siyan Zhang
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China
| | - Dongyu Zhang
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China
| | - Hang Dong
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China
| | - Min Song
- Powder Metallurgy Research Institute, Central South University, Changsha 410083, PR China
| | - Zhi Zhou
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China.
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Gao J, Zhou H, Zhang F, Ji K, Liu P, Liu Z, Zhang K. Effect of Preparation Method on the Catalytic Performance of H ZSM-5 Zeolite Catalysts in the MTH Reaction. Materials (Basel) 2022; 15:2206. [PMID: 35329658 DOI: 10.3390/ma15062206] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/31/2022] [Accepted: 02/15/2022] [Indexed: 12/04/2022]
Abstract
A kind of nano-ZSM-5 zeolite crystal was synthesized by the hydrothermal method, and HZSM-5 zeolite powder was obtained via acid exchange. By using pseudoboehmite as a binder, a series of HZSM-5 zeolite catalysts for methanol-to-hydrocarbons (MTH) were prepared through adjusting the binder content between 20 and 50% in addition to the molding method of wet extrusion and mechanical mixing. XRD, 27Al NMR, SEM-EDS, ICP, low-temperature N2 adsorption and desorption, NH3-TPD, Py-FTIR, FT-IR, TG and elemental analyses were used to characterize the properties of fresh catalysts and coke-deposited catalysts. Then, MTH catalytic performance was evaluated in a continuous-flow fixed-bed reactor. The characterization and evaluation results showed that the addition of dilute nitric acid during the molding process increased the amount of moderate-strength acid and formed a hierarchical pore distribution, which helped to reduce the reaction ability of cracking, aromatization and hydrogen transfer, improve the diffusion properties of the catalyst and slow down the coke deposition rate. The catalyst with a binder content of 30% made by wet extrusion with dilute nitric acid had the best performance, whose activity stability of MTH increased by 96 h, higher than other catalysts, and the coke deposition rate was slower, which was due to the most suitable distribution of acid strength and B/L ratio as well as the most obvious hierarchical pore structure.
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24
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Nguyen HGT, Tao R, van Zee RD. Porosity, Powder X-Ray Diffraction Patterns, Skeletal Density, and Thermal Stability of NIST Zeolitic Reference Materials RM 8850, RM 8851, and RM 8852. J Res Natl Inst Stand Technol 2022; 126:126047. [PMID: 36475089 PMCID: PMC9707632 DOI: 10.6028/jres.126.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 12/14/2021] [Indexed: 06/17/2023]
Abstract
This paper reports the powder X-ray diffraction patterns, argon isotherms at 87 K, Brunauer-Emmett-Teller surface areas, pore size distributions, pore volumes, skeletal densities, and thermal gravimetric analyses for three National Institute of Standards and Technology zeolitic reference materials, RM 8850 (zeolite Y), RM 8851 (zeolite A), and RM 8852 (ZSM-5).
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Affiliation(s)
- Huong Giang T. Nguyen
- Chemical Sciences Division, National Institute of Standards and
Technology, Gaithersburg, MD 20899, USA
| | - Ran Tao
- Chemical Sciences Division, National Institute of Standards and
Technology, Gaithersburg, MD 20899, USA
| | - Roger D. van Zee
- Chemical Sciences Division, National Institute of Standards and
Technology, Gaithersburg, MD 20899, USA
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25
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Hou J, Zhong D, Liu W. Catalytic co-pyrolysis of oil sludge and biomass over ZSM-5 for production of aromatic platform chemicals. Chemosphere 2022; 291:132912. [PMID: 34785179 DOI: 10.1016/j.chemosphere.2021.132912] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 11/12/2021] [Accepted: 11/12/2021] [Indexed: 06/13/2023]
Abstract
Hazardous oil sludge (OS) poses a great challenge to the environment, whereas conventional treatment methods (i.e., incineration or pyrolysis-incineration) are relatively less value-added and will bring about air pollution problems. To realize the high-value utilization of OS, catalytic co-pyrolysis with waste biomass to produce platform chemicals was studied using TG-FTIR and Py (pyrolyzer)-GC/MS methods. Results showed that for the non-catalytic co-pyrolysis of RH (rice husk) and OS, the main synergy on weight loss was the greatly lowered initial pyrolysis temperature of RH (for ∼55 °C) at the lower temperatures and the reduced weight loss ratio of OS (∼10-18 wt%) within the higher temperature range. ZSM-5 catalyst promoted the degradation of OS and RH mixtures at < 150 °C, yet showed minor effects on their weight loss at higher temperatures. The oxygenated and aliphatic compounds from non-catalytic co-pyrolysis were efficiently converted, resulting in an increased relative yield of aromatics to the highest of 46% and an elevated selectivity to BTX (as high as 60%). Despite the relatively short carbon chain length of OS components, ZSM-5 was proved effective to activate the OS pyrolysis products, thus enhancing the further aromatization reactions with biomass pyrolysis intermediates. This study provides a novel method for value-added co-utilization of hazardous OS waste and abundant biomass waste, and thus is beneficial to producing renewable chemicals while reducing the environment pollutant.
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Affiliation(s)
- Jinyu Hou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Daoxu Zhong
- Jiangsu Provincial Academy of Environmental Science, Nanjing, Jiangsu, 210036, China
| | - Wuxing Liu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
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26
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Fujiwara H, Imai H, Adachi Y, Kimura A. Analysis of NMR Adsorption Isotherms of Zeolite ZSM-5: Adsorption Profiles Derived from the Pressure and Temperature Dependences of 129Xe NMR Chemical Shift and Signal Intensity. ANAL SCI 2021; 37:1803-1810. [PMID: 34897179 DOI: 10.2116/analsci.21p202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
129Xe NMR spectroscopy of nanomaterials, such as zeolites, can provide valuable information on the nanostructure and physicochemical properties of adsorption. In the present study the pressure and temperature dependences of the 129Xe NMR chemical shift and the signal intensity were investigated in detail with a zeolite ZSM-5. The pressure dependence of the signal intensity at constant temperature was analyzed based on the Langmuir and Dubinin-Radushkevich (D-R) models, from which the thermodynamic parameters and energetic profiles of adsorption were obtained together with information concerning the nanospace size. From this isotherm analysis the coverage, θ, was calculated and used for isotherm analysis of the chemical shift. The θ dependence of the chemical shift was successfully fitted by an exponential function, and the results were discussed in relation to the chemical shift at zero coverage, that at full coverage and the curvature of the exponential function. The chemical shift data reported with the zeolites NaA and KA, where separated signals were observed for the different number of encapsulated Xe atoms in the α cage, were analyzed and discussed collectively.
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Affiliation(s)
- Hideaki Fujiwara
- Department of Medical Physics and Engineering, Area of Medical Imaging Technology and Science, Division of Health Sciences, Graduate School of Medicine, Osaka University.,MR MedChem Research, LLC
| | - Hirohiko Imai
- Division of Systems Informatics, Department of Systems Science, Graduate School of Informatics, Kyoto University
| | - Yuko Adachi
- Department of Medical Physics and Engineering, Area of Medical Imaging Technology and Science, Division of Health Sciences, Graduate School of Medicine, Osaka University
| | - Atsuomi Kimura
- Department of Medical Physics and Engineering, Area of Medical Imaging Technology and Science, Division of Health Sciences, Graduate School of Medicine, Osaka University
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27
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Wu Q, Jiang L, Wang Y, Dai L, Liu Y, Zou R, Tian X, Ke L, Yang X, Ruan R. Pyrolysis of soybean soapstock for hydrocarbon bio-oil over a microwave-responsive catalyst in a series microwave system. Bioresour Technol 2021; 341:125800. [PMID: 34438288 DOI: 10.1016/j.biortech.2021.125800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/13/2021] [Accepted: 08/14/2021] [Indexed: 06/13/2023]
Abstract
A novel Silicon carbide (SiC) foam ceramic based ZSM-5/SiC nanowires microwave-responsive catalyst was developed to upgrade the pyrolysis volatiles in a microwave-assisted series system (both the pyrolysis and catalytic systems were heated by microwave). The growth of SiC nanowires was helpful for the ZSM-5 growth on the SiC foam ceramic. Because the specific surface area of SiC foam ceramic was improved. The dielectric properties of the composite catalyst were improved due to the growth of SiC nanowires. Bio-oil composition analysis showed that area percentage of hydrocarbons and aromatic hydrocarbons could reach 80.89% and 40.48% at catalytic temperature of 450 ℃and 500 ℃, respectively. The microwave-responsive composite catalyst had good aromatization performance in microwave-assisted series system due to high dielectric properties and specific surface area. The composite catalyst performed well after five-cycle regeneration, and the hydrocarbon content could still reach 76.40%, which is 80.89% for the original catalyst.
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Affiliation(s)
- Qiuhao Wu
- State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Lin Jiang
- State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Yunpu Wang
- State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China.
| | - Leilei Dai
- State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China; Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul MN 55108, USA
| | - Yuhuan Liu
- State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Rongge Zou
- Department of Biological Systems Engineering, Washington State University, 2710 Crimson Way, Richland, WA 99354-1671, USA
| | - Xiaojie Tian
- State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Linyao Ke
- State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Xiuhua Yang
- State Key Laboratory of Food Science and Technology, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Roger Ruan
- Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul MN 55108, USA
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28
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Fu D, Maris JJE, Stanciakova K, Nikolopoulos N, van der Heijden O, Mandemaker LDB, Siemons ME, Salas Pastene D, Kapitein LC, Rabouw FT, Meirer F, Weckhuysen BM. Unravelling Channel Structure-Diffusivity Relationships in Zeolite ZSM-5 at the Single-Molecule Level. Angew Chem Int Ed Engl 2021; 61:e202114388. [PMID: 34788496 PMCID: PMC9299850 DOI: 10.1002/anie.202114388] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Indexed: 11/06/2022]
Abstract
The development of improved zeolite materials for applications in separation and catalysis requires understanding of mass transport. Herein, diffusion of single molecules is tracked in the straight and sinusoidal channels of the industrially relevant ZSM-5 zeolites using a combination of single-molecule localization microscopy and uniformly oriented zeolite thin films. Distinct motion behaviors are observed in zeolite channels with the same geometry, suggesting heterogeneous guest-host interactions. Quantification of the diffusion heterogeneities in the sinusoidal and straight channels suggests that the geometry of zeolite channels dictates the mobility and motion behavior of the guest molecules, resulting in diffusion anisotropy. The study of hierarchical zeolites shows that the addition of secondary pore networks primarily enhances the diffusivity of sinusoidal zeolite channels, and thus alleviating the diffusion limitations of microporous zeolites.
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Affiliation(s)
- Donglong Fu
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - J J Erik Maris
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - Katarina Stanciakova
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - Nikolaos Nikolopoulos
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - Onno van der Heijden
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - Laurens D B Mandemaker
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - Marijn E Siemons
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - Desiree Salas Pastene
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - Lukas C Kapitein
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - Freddy T Rabouw
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - Florian Meirer
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG, Utrecht, The Netherlands
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29
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Fei X, Ouyang W, Gu Z, Cao S, Wang H, Weng X, Wu Z. Effect of Cr doping in promoting the catalytic oxidation of dichloromethane (CH 2Cl 2) over Cr-Co@Z catalysts. J Hazard Mater 2021; 413:125327. [PMID: 33588329 DOI: 10.1016/j.jhazmat.2021.125327] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 02/01/2021] [Accepted: 02/02/2021] [Indexed: 06/12/2023]
Abstract
A core-shell catalyst which consists of a Co3O4 core and ZSM-5 shell, was prepared by microwave hydrothermal method and subjected for dichloromethane (DCM) oxidation. Chromium, cerium, niobium, and manganese species were separately introduced into the core-shell catalyst using the wet precipitation method and denoted as M-Co@Z (M = Cr, Ce, Nb, Mn). The catalytic activity of the Cr-Co@Z catalyst was significantly increased due to the interaction between Cr2O3 and Co3O4. The results of Raman spectra indicated the incorporation of chromium into the Co3O4 lattice and revealed the existence of the interaction between Cr2O3 and Co3O4. The synergistic effect between Cr2O3 and Co3O4 might be conducive to the generation of highly defective structure and increase the ratio of Co3+/Co2+ of the sample, leading to its better oxygen mobility. The dechlorination ability of Cr-Co@Z was also promoted due to the enhanced mobility of lattice oxygen. Based on in situ DRIFT studies, a possible reaction route of CH2Cl2 oxidation over Cr-Co@Z catalyst was proposed.
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Affiliation(s)
- Xiaoqi Fei
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental Resources Science, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Provincial Engineering Research Center of Industrial Boiler Furnace Flue Gas Pollution Control, Hangzhou 310058, PR China
| | - Weilong Ouyang
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental Resources Science, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Provincial Engineering Research Center of Industrial Boiler Furnace Flue Gas Pollution Control, Hangzhou 310058, PR China
| | - Zhenyu Gu
- Ecological and Environmental Science Design and Research Institute of Zhejiang Province, Hangzhou 310007, PR China
| | - Shuang Cao
- Department of Environmental Engineering, China Jiliang University, Hangzhou 310018, PR China
| | - Haiqiang Wang
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental Resources Science, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Provincial Engineering Research Center of Industrial Boiler Furnace Flue Gas Pollution Control, Hangzhou 310058, PR China.
| | - Xiaole Weng
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental Resources Science, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Provincial Engineering Research Center of Industrial Boiler Furnace Flue Gas Pollution Control, Hangzhou 310058, PR China
| | - Zhongbiao Wu
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental Resources Science, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Provincial Engineering Research Center of Industrial Boiler Furnace Flue Gas Pollution Control, Hangzhou 310058, PR China
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30
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Wotzka A, Jorabchi MN, Wohlrab S. Separation of H 2O/CO 2 Mixtures by MFI Membranes: Experiment and Monte Carlo Study. Membranes (Basel) 2021; 11:439. [PMID: 34200933 DOI: 10.3390/membranes11060439] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/03/2021] [Accepted: 06/07/2021] [Indexed: 12/03/2022]
Abstract
The separation of CO2 from gas streams is a central process to close the carbon cycle. Established amine scrubbing methods often require hot water vapour to desorb the previously stored CO2. In this work, the applicability of MFI membranes for H2O/CO2 separation is principally demonstrated by means of realistic adsorption isotherms computed by configurational-biased Monte Carlo (CBMC) simulations, then parameters such as temperatures, pressures and compositions were identified at which inorganic membranes with high selectivity can separate hot water vapour and thus make it available for recycling. Capillary condensation/adsorption by water in the microporous membranes used drastically reduces the transport and thus the CO2 permeance. Thus, separation factors of αH2O/CO2 = 6970 could be achieved at 70 °C and 1.8 bar feed pressure. Furthermore, the membranes were tested for stability against typical amines used in gas scrubbing processes. The preferred MFI membrane showed particularly high stability under application conditions.
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31
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Han T, Xu H, Liu J, Zhou L, Li X, Dong J, Ge H. One-Pass Conversion of Benzene and Syngas to Alkylbenzenes by Cu-ZnO-Al 2O 3 and ZSM-5 Relay. Catal Letters 2021; 152:467-479. [PMID: 34002107 PMCID: PMC8116197 DOI: 10.1007/s10562-021-03617-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 03/28/2021] [Indexed: 02/03/2023]
Abstract
Alkylbenzenes have a wide range of uses and are the most demanded aromatic chemicals. The finite petroleum resources compels the development of production of alkylbenzenes by non-petroleum routes. One-pass selective conversion of benzene and syngas to alkylbenzenes is a promising alternative coal chemical engineering route, yet it still faces challenge to industrialized applications owing to low conversion of benzene and syngas. Here we presented a Cu-ZnO-Al2O3/ZSM-5 bifunctional catalyst which realizes one-pass conversion of benzene and syngas to alkylbenzenes with high efficiency. This bifunctional catalyst exhibited high benzene conversion (benzene conversion of 50.7%), CO conversion (CO conversion of 55.0%) and C7&C8 aromatics total yield (C7&C8 total yield of 45.0%). Characterizations and catalytic performance evaluations revealed that ZSM-5 with well-regulated acidity, as a vital part of this Cu-ZnO-Al2O3/ZSM-5 bifunctional catalyst, substantially contributed to its performance for the alkylbenzenes one-pass synthesis from benzene and syngas due to depress methanol-to-olefins (MTO) reaction. Furthermore, matching of the mass ratio of two active components in the dual-function catalyst and the temperature of methanol synthesis with benzene alkylation reactions can effectively depress the formation of unwanted by-products and guarantee the high performance of tandem reactions. GRAPHIC ABSTRACT SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s10562-021-03617-5.
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Affiliation(s)
- Tengfei Han
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, 030024 Shanxi Province China
| | - Hong Xu
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, 030024 Shanxi Province China
| | - Jianchao Liu
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, 030024 Shanxi Province China
| | - Ligong Zhou
- Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001 Shanxi Province China
| | - Xuekuan Li
- Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001 Shanxi Province China
| | - Jinxiang Dong
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, 030024 Shanxi Province China
| | - Hui Ge
- Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001 Shanxi Province China
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Chen WH, Cheng CL, Lee KT, Lam SS, Ong HC, Ok YS, Saeidi S, Sharma AK, Hsieh TH. Catalytic level identification of ZSM-5 on biomass pyrolysis and aromatic hydrocarbon formation. Chemosphere 2021; 271:129510. [PMID: 33434827 DOI: 10.1016/j.chemosphere.2020.129510] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 12/13/2020] [Accepted: 12/28/2020] [Indexed: 06/12/2023]
Abstract
Zeolite socony mobil-5 (ZSM-5) is a common catalyst used for biomass pyrolysis. Nevertheless, the quantitative information on the catalytic behavior of ZSM-5 on biomass pyrolysis is absent so far. This study focuses on the catalytic pyrolysis phenomena and mechanisms of biomass wastes using ZSM-5 via thermogravimetric analyzer and pyrolysis-gas chromatography/mass spectrometry, with particular emphasis on catalytic level identification and aromatic hydrocarbons (AHs) formation. Two biomass wastes of sawdust and sorghum distillery residue (SDR) are investigated, while four biomass-to-catalyst ratios are considered. The analysis suggests that biomass waste pyrolysis processes can be divided into three zones, proceeding from a heat-transfer dominant zone (zone 1) to catalysis dominant zones (zones 2 and 3). The indicators of the intensity of difference (IOD), catalytic effective area, catalytic index (CI), and aromatic enhancement index are conducted to measure the catalytic effect of ZSM-5 on biomass waste pyrolysis and AHs formation. The maximum IOD occurs in zone 2, showing the highest intensity of the catalytic effect. The CI values of the two biomass wastes increase with increasing the biomass-to-catalyst ratio. However, there exists a threshold for sawdust pyrolysis, indicating a limit for the catalytic effect on sawdust. The higher the catalyst addition, the higher the AHs proportion in the vapor stream. When the biomass-to-catalyst ratio is 1/10, AHs formation is intensified significantly, especially for sawdust. Overall, the indexes conducted in the present study can provide useful measures to identify the catalytic pyrolysis dynamics and levels.
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Affiliation(s)
- Wei-Hsin Chen
- Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan, 701, Taiwan, ROC; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung 407, Taiwan; Department of Mechanical Engineering, National Chin-Yi University of Technology, Taichung, 411, Taiwan, ROC.
| | - Ching-Lin Cheng
- Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan, 701, Taiwan, ROC
| | - Kuan-Ting Lee
- Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan, 701, Taiwan, ROC
| | - Su Shiung Lam
- Pyrolysis Technology Research Group, Institute of Tropical Aquaculture and Fisheries Research (Akuatrop) & Institute of Tropical Biodiversity and Sustainable Development (Bio-D Tropika), Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia; Henan Province Engineering Research Center for Biomass Value-added Products, Henan Agricultural University, Zhengzhou, 450002, China
| | - Hwai Chyuan Ong
- School of Information, Systems and Modelling, Faculty of Engineering and Information Technology, University of Technology Sydney, NSW, 2007, Australia
| | - Yong Sik Ok
- Korea Biochar Research Center, APRU Sustainable Waste Management & Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Samrand Saeidi
- Institute of Energy and Process Systems Engineering, Technische Universität Braunschweig, Franz-Liszt-Str. 35, 38106 Braunschweig, Germany
| | - Amit K Sharma
- Department of Chemistry and Centre for Alternate and Renewable Energy Research, R&D, University of Petroleum & Energy Studies (UPES), School of Engineering, Energy Acres, Building, Bidholi, Dehradun, 248007, Uttarakhand, India
| | - Tzu-Hsien Hsieh
- Green Technology Research Institute, CPC Corporation, Kaohsiung, 811, Taiwan, ROC
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Feng Z, Liu X, Wang Y, Meng C. Recent Advances on Gallium-Modified ZSM-5 for Conversion of Light Hydrocarbons. Molecules 2021; 26:molecules26082234. [PMID: 33924390 PMCID: PMC8069487 DOI: 10.3390/molecules26082234] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/05/2021] [Accepted: 04/08/2021] [Indexed: 11/16/2022] Open
Abstract
Light olefins are key components of modern chemical industry and are feedstocks for the production of many commodity chemicals widely used in our daily life. It would be of great economic significance to convert light alkanes, produced during the refining of crude oil or extracted during the processing of natural gas selectively to value-added products, such as light alkenes, aromatic hydrocarbons, etc., through catalytic dehydrogenation. Among various catalysts developed, Ga-modified ZSM-5-based catalysts exhibit superior catalytic performance and stability in dehydrogenation of light alkanes. In this mini review, we summarize the progress on synthesis and application of Ga-modified ZSM-5 as catalysts in dehydrogenation of light alkanes to olefins, and the dehydroaromatization to aromatics in the past two decades, as well as the discussions on in-situ formation and evolution of reactive Ga species as catalytic centers and the reaction mechanisms.
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Affiliation(s)
| | - Xin Liu
- Correspondence: (X.L.); (C.M.)
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Kim S, Gupta NK, Bae J, Kim KS. UV-activated adsorbents as novel materials for enhanced removal of malodorous gases. Chemosphere 2021; 266:128943. [PMID: 33218733 DOI: 10.1016/j.chemosphere.2020.128943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 09/30/2020] [Accepted: 11/08/2020] [Indexed: 06/11/2023]
Abstract
The performance of UV-activated Fe2O3-containing ZSM-5 (UFZ5) and silica (UFS) as adsorbents for the removal of low concentration of volatile organic sulfur compounds (VOSCs) was investigated in ambient conditions. A ∼99.9% and ∼89.2% removal of 10 ppm DMDS was observed for UFZ5 and UFS, respectively, due to a higher proportion of iron in UFZ5. The N2 adsorption isotherm confirmed an unpredictable increase in the surface area and pore volume of adsorbents after the fifth adsorption-oxidation cycle, which made adsorbents highly reusable for multiple cycles. The spectroscopic analysis predicted an increase in the hydroxyl density along with the resistance of catalytic sites against sulfur deactivation, which favored the adsorption-oxidation process. The adsorption capacity of UFZ5 remained in the range of 0.12-0.22, 0.26-0.48, 0.40-0.75 mg g-1 for methyl mercaptan (MM), dimethyl sulfide (DMS), and dimethyl disulfide (DMDS), respectively which were significantly higher than those calculated for UFS. The analysis confirmed SO2, CO, CH3OH, H2O, and elemental S as by-products. The UFZ5 was found competent and robust for the treatment of VOSCs-contaminated indoor air.
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Affiliation(s)
- Suho Kim
- University of Science and Technology (UST), Daejeon, Republic of Korea; Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Republic of Korea
| | - Nishesh Kumar Gupta
- University of Science and Technology (UST), Daejeon, Republic of Korea; Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Republic of Korea
| | - Jiyeol Bae
- Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Republic of Korea
| | - Kwang Soo Kim
- University of Science and Technology (UST), Daejeon, Republic of Korea; Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Republic of Korea.
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Karakaya YalÇin B, İpek B. One-step synthesis of hierarchical [B]- ZSM-5 using cetyltrimethylammonium bromide as mesoporogen. Turk J Chem 2021; 44:841-858. [PMID: 33488198 PMCID: PMC7671202 DOI: 10.3906/kim-2001-42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 05/15/2020] [Indexed: 11/12/2022] Open
Abstract
One-step facile synthesis of boron containing ZSM-5 microspheres is developed using 1,6-diaminohexane as the structure-directing agent and cetyltrimethylammonium bromide as the mesoporogen. High boron incorporation up to Si/B ratio of 38 is achieved and evidenced by the stretching vibrations of B–O–Si at 667 cm-1 and 917 cm-1 using Fourier-transform infrared spectra. The morphology of the crystals resembles berry-like spheres with sizes approximately 15 μm, which is composed of aggregated nanocrystals having sizes around 450 nm, is observed using scanning electron microscopy. The textural properties, i.e. the surface areas and pore volumes are investigated using N2 adsorption at –196 °C. t-plot micropore volume of 0.11 cm3/g and mesopore volume of 0.14 cm3/g are obtained applying this synthesis method for mesopores having pore diameters within the range of 2–10 nm.
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Affiliation(s)
- Büşra Karakaya YalÇin
- Department of Chemical Engineering, Faculty of Engineering, Middle East Technical University, Ankara Turkey
| | - Bahar İpek
- Department of Chemical Engineering, Faculty of Engineering, Middle East Technical University, Ankara Turkey
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Wei Q, Zhang P, Liu X, Huang W, Fan X, Yan Y, Zhang R, Wang L, Zhou Y. Synthesis of Ni-Modified ZSM-5 Zeolites and Their Catalytic Performance in n-Octane Hydroconversion. Front Chem 2020; 8:586445. [PMID: 33363107 PMCID: PMC7759625 DOI: 10.3389/fchem.2020.586445] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 11/16/2020] [Indexed: 12/02/2022] Open
Abstract
Ni-modified ZSM-5 zeolites with different nickel contents were successfully prepared by the in situ synthesis method and the impregnation method. The synthesized samples were characterized by XRD, SEM, N2 adsorption–desorption isothermals, and Py-FTIR. The characterization results show that both the textural properties and crystallization of Ni-modified ZSM-5 zeolites were preserved well, and their acidic properties can be modulated after nickel modification. The corresponding NiMo catalysts supported on Ni-modified ZSM-5 zeolites were prepared by the incipient wetness co-impregnation method, and their catalytic performances were evaluated in n-octane hydroconversion. Compared to the those modified by the in situ synthesis method, ZSM-5 zeolite-supported catalysts modified by the impregnation method exhibit higher stability and higher isomerization selectivity. This is due to the synergistic effect between Brønsted acid sites and Lewis acid sites on the Ni-modified ZSM-5 zeolites, especially for the NiMo/1Ni-Z5 catalyst.
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Affiliation(s)
- Qiang Wei
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, China
| | - Pengfei Zhang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, China
| | - Xiaodong Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, China
| | - Wenbin Huang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, China
| | - Xiayun Fan
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, China
| | - Yitong Yan
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, China
| | - Rongxun Zhang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, China
| | - Lin Wang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, China
| | - Yasong Zhou
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, China
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37
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Li Z, Yang J, Zhou Y, Cui J, Ma Y, Geng C, Kang Y, Liu J, Yang C. Influence of different preparation methods on the activity of Ce and Mo co-doped ZSM-5 catalysts for the selective catalytic reduction of NO x by NH 3. Environ Sci Pollut Res Int 2020; 27:40495-40503. [PMID: 32666452 DOI: 10.1007/s11356-020-10052-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 07/07/2020] [Indexed: 06/11/2023]
Abstract
The Ce-doped different MoO3 [conventional molybdenum oxide (con-MoO3) or nano molybdenum oxide (nano-MoO3) and synthetic molybdenum oxide (syn-MoO3)] modification of ZSM-5 catalyst synthesized by different preparation methods (the combination of grinding and ion-exchange method and the combination of impregnation and ion-exchange method) was studied on selective catalytic reduction (SCR) of NOx with NH3. The results demonstrated that the SCR performance of the prepared Ce-doped syn-MoO3 modification of ZSM-5 catalyst [Ce(0.9%)-syn-MoO3(6%)/ZSM-5] by the combination of impregnation and ion-exchange method was better than Ce-doped con-MoO3 modification of ZSM-5 [Ce(0.9%)-con-MoO3(6%)/ZSM-5] and Ce-doped nano-MoO3 modification of ZSM-5 [Ce(0.9%)-nano-MoO3(6%)/ZSM-5] via the combination of grinding and ion-exchange method, especially when the temperature window is 200-350 °C. That is because it is easy to form Mo-O-Al by the smaller sized MoO3 more easily interacting well with Brønsted acid under calcining temperature, which results in the decrease of Brønsted acid sites in the catalyst. Combing with the binding energy of Mo for all the catalysts, the combination of Mo and Al (Mo-O-Al) altered the chemical environment around the Mo species. Furthermore, Ce(0.9%)-syn-MoO3(6%)/ZSM-5 exhibited excellent sulfur resistance.
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Affiliation(s)
- Zhifang Li
- College of Materials Science and Engineering, Heilongjiang Province Key Laboratory of Polymeric Composite Material, Qiqihar University, Qiqihar, 161006, China
| | - Jian Yang
- College of Materials Science and Engineering, Heilongjiang Province Key Laboratory of Polymeric Composite Material, Qiqihar University, Qiqihar, 161006, China
| | - Yadong Zhou
- Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, 500 Dongchuan Road, Minhang District, Shanghai, 200241, China
| | - Jinxing Cui
- College of Materials Science and Engineering, Heilongjiang Province Key Laboratory of Polymeric Composite Material, Qiqihar University, Qiqihar, 161006, China
- College of Materials Science and Engineering, Graphene Functional Materials Research Laboratory, Qiqihar University, Qiqihar, 161006, China
| | - Yuanyuan Ma
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, 161006, China
| | - Cui Geng
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, 161006, China
| | - Yan Kang
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, 161006, China
| | - Jiayin Liu
- College of Science, Northeast Agricultural University, Harbin, 150030, China
| | - Changlong Yang
- College of Materials Science and Engineering, Heilongjiang Province Key Laboratory of Polymeric Composite Material, Qiqihar University, Qiqihar, 161006, China.
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Jiao Y, Forster L, Xu S, Chen H, Han J, Liu X, Zhou Y, Liu J, Zhang J, Yu J, D'Agostino C, Fan X. Creation of Al-Enriched Mesoporous ZSM-5 Nanoboxes with High Catalytic Activity: Converting Tetrahedral Extra-Framework Al into Framework Sites by Post Treatment. Angew Chem Int Ed Engl 2020; 59:19478-19486. [PMID: 32159268 PMCID: PMC7687177 DOI: 10.1002/anie.202002416] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Indexed: 11/15/2022]
Abstract
ZSM‐5 zeolite nanoboxes with accessible meso‐micro‐pore architecture and strong acid sites are important in relevant heterogeneous catalysis suffering from mass transfer limitations and weak acidities. Rational design of parent zeolites with concentrated and non‐protective coordination of Al species can facilitate post‐synthetic treatment to produce mesoporous ZSM‐5 nanoboxes. In this work, a simple and effective method was developed to convert parent MFI zeolites with tetrahedral extra‐framework Al into Al‐enriched mesoporous ZSM‐5 nanoboxes with low silicon‐to‐aluminium ratios of ≈16. The parent MFI zeolite was prepared by rapid ageing of the zeolite sol gel synthesis mixture. The accessibility to the meso‐micro‐porous intra‐crystalline network was probed systematically by comparative pulsed field gradient nuclear magnetic resonance diffusion measurements, which, together with the strong acidity of nanoboxes, provided superb catalytic activity and longevity in hydrocarbon cracking for propylene production.
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Affiliation(s)
- Yilai Jiao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China.,Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Luke Forster
- Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Shaojun Xu
- Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Huanhao Chen
- Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Jingfeng Han
- National Engineering Laboratory for Methanol to Olefins, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Xuqing Liu
- Department of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Yangtao Zhou
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Jinmin Liu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Jinsong Zhang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
| | - Jihong Yu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China.,International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun, 130012, China
| | - Carmine D'Agostino
- Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Xiaolei Fan
- Department of Chemical Engineering and Analytical Science, School of Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
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Shelyapina MG, Yocupicio-Gaxiola RI, Zhelezniak IV, Chislov MV, Antúnez-García J, Murrieta-Rico FN, Galván DH, Petranovskii V, Fuentes-Moyado S. Local Structures of Two-Dimensional Zeolites-Mordenite and ZSM-5-Probed by Multinuclear NMR. Molecules 2020; 25:E4678. [PMID: 33066351 PMCID: PMC7587376 DOI: 10.3390/molecules25204678] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 10/10/2020] [Accepted: 10/13/2020] [Indexed: 11/19/2022] Open
Abstract
Mesostructured pillared zeolite materials in the form of lamellar phases with a crystal structure of mordenite (MOR) and ZSM-5 (MFI) were grown using CTAB as an agent that creates mesopores, in a one-pot synthesis; then into the CTAB layers separating the 2D zeolite plates were introduced by diffusion the TEOS molecules which were further hydrolyzed, and finally the material was annealed to remove the organic phase, leaving the 2D zeolite plates separated by pillars of silicon dioxide. To monitor the successive structural changes and the state of the atoms of the zeolite framework and organic compounds at all the steps of the synthesis of pillared MOR and MFI zeolites, the nuclear magnetic resonance method (NMR) with magic angle spinning (MAS) was applied. The 27Al and 29Si MAS NMR spectra confirm the regularity of the zeolite frameworks of the as synthetized materials. Analysis of the 1H and 13C MAS NMR spectra and an experiment with variable contact time evidence a strong interaction between the charged "heads" -[N(CH3)3]+ of CTAB and the zeolite framework at the place of [AlO4]- location. According to 27Al and 29Si MAS NMR the evacuation of organic cations leads to a partial but not critical collapse of the local zeolite structure.
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Affiliation(s)
- Marina G. Shelyapina
- Department of Nuclear Physics Research Methods, Saint-Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia; (I.V.Z.); (M.V.C.)
| | - Rosario I. Yocupicio-Gaxiola
- Center for Scientific Research and Higher Education at Ensenada (CICESE), Ensenada, Baja California 22860, Mexico;
| | - Iuliia V. Zhelezniak
- Department of Nuclear Physics Research Methods, Saint-Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia; (I.V.Z.); (M.V.C.)
| | - Mikhail V. Chislov
- Department of Nuclear Physics Research Methods, Saint-Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia; (I.V.Z.); (M.V.C.)
| | - Joel Antúnez-García
- Center for Nanoscience and Nanotechnology, National Autonomous University of Mexico (CNyN, UNAM), Ensenada, Baja California 22860, Mexico; (J.A.-G.); (F.N.M.-R.); (D.H.G.); (V.P.); (S.F.-M.)
| | - Fabian N. Murrieta-Rico
- Center for Nanoscience and Nanotechnology, National Autonomous University of Mexico (CNyN, UNAM), Ensenada, Baja California 22860, Mexico; (J.A.-G.); (F.N.M.-R.); (D.H.G.); (V.P.); (S.F.-M.)
| | - Donald Homero Galván
- Center for Nanoscience and Nanotechnology, National Autonomous University of Mexico (CNyN, UNAM), Ensenada, Baja California 22860, Mexico; (J.A.-G.); (F.N.M.-R.); (D.H.G.); (V.P.); (S.F.-M.)
| | - Vitalii Petranovskii
- Center for Nanoscience and Nanotechnology, National Autonomous University of Mexico (CNyN, UNAM), Ensenada, Baja California 22860, Mexico; (J.A.-G.); (F.N.M.-R.); (D.H.G.); (V.P.); (S.F.-M.)
| | - Sergio Fuentes-Moyado
- Center for Nanoscience and Nanotechnology, National Autonomous University of Mexico (CNyN, UNAM), Ensenada, Baja California 22860, Mexico; (J.A.-G.); (F.N.M.-R.); (D.H.G.); (V.P.); (S.F.-M.)
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Zahrani AA, Ayati B. Improving Fe-based heterogeneous Electro-Fenton nano catalyst using transition metals in a novel orbiting electrodes reactor. Chemosphere 2020; 256:127049. [PMID: 32447107 DOI: 10.1016/j.chemosphere.2020.127049] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 04/25/2020] [Accepted: 05/09/2020] [Indexed: 06/11/2023]
Abstract
In recent decades the electro-Fenton process has widely been utilized for removing recalcitrant compounds. However, this process is accompanied by several problems such as limited working pH range, production of significant amount of iron sludge, and incapability in reusing used iron ions. Hence, the heterogeneous electro-Fenton process is a convenient way to address these problems. One of the shortcomings of this method, in comparison with the homogeneous electro-Fenton process, is its lower reaction rate. In the first phase of this study, a heterogeneous Fe-based nanocatalyst was prepared. After optimizing the affecting parameters, three transition metals (M: Cu, Co and, Cr) were used in the second phase of the study to improve the performance of this nanocatalyst in removing the indicator pollutant (acid blue 25). The characteristics of nanocatalysts were determined via FESEM, XRD, FTIR, and N2 adsorption-desorption techniques. The results indicated an enhancement in dye removal efficiency (nearly 8 percent), and the reaction rate (nearly 64 percent) due to the nanocatalysts improved by the presence of transition metals. The reactions with Fe-based nanocatalyst containing copper ions in pH = 3, initial dye concentration = 200 mg L-1, I = 3.57 mA cm-2, nanocatalyst concentration = 100 mg L-1, electrodes angular velocity = 50 rpm, Na2SO4 concentration = 0.01 M were capable of removing 97% of dye, 79% of COD and, 65% of TOC. The nanocatalysts were used in 5 cycles, and the dye removal efficiency did not drop considerably, a feature that adds to their importance from an economic point of view. The concentration of leached transition metals into the solution was measured using the ICP-AES technique, which was less than the allowable Iranian standard concentration of discharge into the surface water bodies, thus no need for secondary treatment of wastewater.
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Affiliation(s)
- Amir Ahmadi Zahrani
- Civil and Environmental Engineering Faculty, Tarbiat Modares University, P.O. Box, 14115-397, Tehran, Iran
| | - Bita Ayati
- Civil and Environmental Engineering Faculty, Tarbiat Modares University, P.O. Box, 14115-397, Tehran, Iran.
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Fu D, van der Heijden O, Stanciakova K, Schmidt JE, Weckhuysen BM. Disentangling Reaction Processes of Zeolites within Single-Oriented Channels. Angew Chem Int Ed Engl 2020; 59:15502-15506. [PMID: 32026555 PMCID: PMC7496746 DOI: 10.1002/anie.201916596] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Indexed: 11/21/2022]
Abstract
Establishing structure-reactivity relationships for specific channel orientations of zeolites is vital to developing new, superior materials for various applications, including oil and gas conversion processes. Herein, a well-defined model system was developed to build structure-reactivity relationships for specific zeolite-channel orientations during various catalytic reaction processes, for example, the methanol- and ethanol-to-hydrocarbons (MTH and ETH) process as well as oligomerization reactions. The entrapped and effluent hydrocarbons from single-oriented zeolite ZSM-5 channels during the MTH process were monitored by using operando UV/Vis diffuse reflectance spectroscopy (DRS) and on-line mass spectrometry (MS), respectively. The results reveal that the straight channels favor the formation of internal coke, promoting the aromatic cycle. Furthermore, the sinusoidal channels produce aromatics, (e.g., toluene) that further grow into larger polyaromatics (e.g., graphitic coke) leading to deactivation of the zeolites. This underscores the importance of careful engineering of materials to suppress coke formation and tune product distribution by rational control of the location of zeolite acid sites and crystallographic orientations.
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Affiliation(s)
- Donglong Fu
- Debye Institute for Nanomaterials ScienceFaculty of ScienceUtrecht UniversityUniversiteitsweg 993584CGUtrechtThe Netherlands
| | - Onno van der Heijden
- Debye Institute for Nanomaterials ScienceFaculty of ScienceUtrecht UniversityUniversiteitsweg 993584CGUtrechtThe Netherlands
| | - Katarina Stanciakova
- Debye Institute for Nanomaterials ScienceFaculty of ScienceUtrecht UniversityUniversiteitsweg 993584CGUtrechtThe Netherlands
| | - Joel E. Schmidt
- Debye Institute for Nanomaterials ScienceFaculty of ScienceUtrecht UniversityUniversiteitsweg 993584CGUtrechtThe Netherlands
| | - Bert M. Weckhuysen
- Debye Institute for Nanomaterials ScienceFaculty of ScienceUtrecht UniversityUniversiteitsweg 993584CGUtrechtThe Netherlands
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Marsiezade N, Javanbakht V. Novel hollow beads of carboxymethyl cellulose/ ZSM-5/ZIF-8 for dye removal from aqueous solution in batch and continuous fixed bed systems. Int J Biol Macromol 2020; 162:1140-1152. [PMID: 32599236 DOI: 10.1016/j.ijbiomac.2020.06.229] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 12/11/2022]
Abstract
Zeolitic imidazolate frameworks are a class of metal-organic frameworks that are topologically isomorphic with zeolites. In this study, bionanocomposites of carboxymethyl cellulose-based ZSM-5/zeolitic imidazolate framework (CMC/ZSM-5/ZIF-8) hollow beads with different compositions were synthesized and employed as an adsorbent for methylene blue removal from aqueous solution in batch and continuous fixed bed systems. FESEM, FTIR, XRD, and BET measurements have been employed for characterizing the synthetic bionanocomposites. The effect of time and concentration on adsorption processes, regeneration, and reuse investigations were performed. The equilibrium batch adsorption capacities for CMC, CMC/ZIF-8, CMC/ZSM-5, and CMC/ZSM-5/ZIF-8 adsorbents were 12.01, 13.06, 11.53, and 10.49 mg/g, respectively. The batch adsorption was investigated using pseudo-first-order, pseudo-second-order, intra-particle diffusion, and Elovich kinetic models and the results showed that all four adsorbents are consistent with all models but the pseudo-first-order model showed more consistency. The equilibrium continuous adsorption capacities for CMC, CMC/ZIF-8, CMC/ZSM-5, and CMC/ZSM-5/ZIF-8 adsorbents were 10.56, 11.87, 9.29, and 8.15 mg/g, respectively. The continuous adsorption was investigated by Thomas, Adam-Bohart, Yoon-Nelson, Wolborska, and Modified Dose Response kinetic models and the results showed that the adsorbents showed more consistency with models of Thomas, Yoon-Nelson, and Modified Dose Response. Besides, the generation process was successfully assessed in five steps.
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Affiliation(s)
- Najme Marsiezade
- ACECR Institute of Higher Education (Isfahan Branch), Isfahan 84175-443, Iran
| | - Vahid Javanbakht
- ACECR Institute of Higher Education (Isfahan Branch), Isfahan 84175-443, Iran.
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Jiang L, Wang Y, Dai L, Yu Z, Wu Q, Zhao Y, Liu Y, Ruan R, Ke L, Peng Y, Xia D, Jiang L. Integrating pyrolysis and ex-situ catalytic reforming by microwave heating to produce hydrocarbon-rich bio-oil from soybean soapstock. Bioresour Technol 2020; 302:122843. [PMID: 32006926 DOI: 10.1016/j.biortech.2020.122843] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 01/15/2020] [Accepted: 01/16/2020] [Indexed: 06/10/2023]
Abstract
The composite catalysts were synthesized with SiC powder and ZSM-5 and were characterized by Brunauer-Emmett-Teller, X-ray diffraction, thermogravimetric analysis, pyridine-infrared spectroscopy, and scanning electron microscopy. The catalysts showed a high heating rate and excellent catalytic performance for pyrolysis vapors, and the product fractional distribution and chemical compositions of bio-oil in a tandem system (microwave pyrolysis and microwave ex-situ catalytic reforming) was examined. Experimental results confirmed the quality of bio-oil produced by the microwave-induced catalytic reforming was better than that product through electric heating. Additionally, 36.94 wt% of bio-oil was obtained using the catalyst with 20%ZSM-5/SiC under the following conditions: feed-to-catalyst ratio, 2:1; pyrolysis temperature, 550 °C; and catalytic temperature, 350 °C. The selectivities of hydrocarbons reached up to 75.88%. After five cycles, the activity of the regenerated composite catalyst was retained at 95% of the original catalyst.
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Affiliation(s)
- Lin Jiang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China; Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Yunpu Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China; Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China.
| | - Leilei Dai
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China; Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Zhenting Yu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China; Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Qiuhao Wu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China; Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Yunfeng Zhao
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China; Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Yuhuan Liu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China; Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Roger Ruan
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China; Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China; Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul, MN 55108, USA
| | - Linyao Ke
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China; Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Yujie Peng
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China; Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Donghua Xia
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China; Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Li Jiang
- Jiangxi University of Traditional Chinese Medicine, Nanchang, Jiangxi 330047, China
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Peng C, Yan R, Peng H, Mi Y, Liang J, Liu W, Wang X, Song G, Wu P, Liu F. One-pot synthesis of layered mesoporous ZSM-5 plus Cu ion-exchange: Enhanced NH 3-SCR performance on Cu-ZSM-5 with hierarchical pore structures. J Hazard Mater 2020; 385:121593. [PMID: 31744726 DOI: 10.1016/j.jhazmat.2019.121593] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 10/15/2019] [Accepted: 11/01/2019] [Indexed: 06/10/2023]
Abstract
Hierarchical ZSM-5 zeolite with meso- and micro-pore structures was successfully prepared through a facile one-pot hydrothermal synthesis method using bifunctional template. After copper ion-exchange, it was applied for the selective catalytic reduction of NO with NH3 (NH3-SCR). Compared with conventional Cu-ZSM-5 catalyst containing only micropores, the hierarchical catalyst with ca. 2 wt.% Cu loading displayed significantly improved catalytic performance. Particularly, the hierarchical zeolite catalyst also displayed excellent hydrothermal stability and sulfur resistance that exhibited great potential in practical application. Characterization techniques such as XRD, N2 physisorption, temperature programmed desorption/reduction (TPD/TPR) and in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) were comprehensively used to reveal the relationship between zeolite structure and catalytic properties. It was concluded that the hierarchically porous structure could not only improve the mass transfer of reactant/product but also provide larger specific surface area, higher surface acidity, larger NO adsorption capacity. And we found that bidentate nitrate species was more active in Cu-ZSM-5-meso than Cu-ZSM-5-C, which were all beneficial to the NH3-SCR reaction. This work can provide a guideline to design other high performance hierarchical zeolites with different crystalline structures (such as CHA, LTA) for efficient catalytic NOx removal processes.
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Affiliation(s)
- Cheng Peng
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi 330031, China
| | - Ran Yan
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi 330031, China
| | - Honggen Peng
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi 330031, China.
| | - Yangyang Mi
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi 330031, China
| | - Jian Liang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi 330031, China
| | - Wenming Liu
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi 330031, China
| | - Xiang Wang
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, 999 Xuefu Road, Nanchang, Jiangxi 330031, China
| | - Ge Song
- Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), NanoScience Technology Center (NSTC), University of Central Florida, Orlando, FL 32816, United States
| | - Peng Wu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry and Molecular Engineering, East China Normal University, North Zhongshan Road 3663, Shanghai 200062, China
| | - Fudong Liu
- Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), NanoScience Technology Center (NSTC), University of Central Florida, Orlando, FL 32816, United States.
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Wojciechowska KM, Król M, Bajda T, Mozgawa W. Sorption of Heavy Metal Cations on Mesoporous ZSM-5 and Mordenite Zeolites. Materials (Basel) 2019; 12:E3271. [PMID: 31597331 DOI: 10.3390/ma12193271] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 10/02/2019] [Accepted: 10/04/2019] [Indexed: 11/16/2022]
Abstract
Desilication and dealumination techniques were used to obtain mesoporous ZSM-5 and mordenite zeolites. The study provides insight into specific structural, textural, and sorption properties of obtained materials with different Si/Al ratios. Subsequent dealumination and desilication procedures were found to be efficient methods of generating a secondary system of mesopores in mordenite and ZSM-5 crystals while preserving their microporous character. The investigated materials were evaluated in terms of their sorption properties of selected heavy metal cations (Cd2+, Cr3+, and Pb2+). Particular emphasis was placed on the structural examination of the materials via infrared spectroscopy (FT-IR). Other research methods included X-ray diffraction (XRD), X-ray fluorescence (XRF), nuclear magnetic resonance (NMR) and atomic absorption spectrometry (AAS).
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Chen J, Ma X, Yu Z, Deng T, Chen X, Chen L, Dai M. A study on catalytic co-pyrolysis of kitchen waste with tire waste over ZSM-5 using TG-FTIR and Py-GC/MS. Bioresour Technol 2019; 289:121585. [PMID: 31207410 DOI: 10.1016/j.biortech.2019.121585] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 05/28/2019] [Accepted: 05/29/2019] [Indexed: 05/28/2023]
Abstract
Co-pyrolysis characteristics of kitchen waste (KW) with tire waste (TW) were studied by TGA-FTIR and Py-GC/MS. The kinetic parameters were calculated by Ozawa-Flynn-Wall (OFW) and the Kissinger-Akahira-Sunose (KAS) methods. TGA-FTIR results indicated that CO2, CO, NO, NH3, SO2, CH and CC groups were the main gases released from the pyrolysis process, finding that a certain coupling synergistic interaction occurred between KW and TW. Co-pyrolysis of KW and TW displayed positive synergy in pyrolysis kinetics, especially at the ratio of 5:5 whose apparent activation energy declined 16.78% (by FWO) and 17.54% (by KAS). The Py-GC/MS results found that co-pyrolysis could increase the total peak area of volatile matters (10.92-15.34%). Moreover, co-pyrolysis could increase hydrocarbons (especially for olefins (13.25-37.42%)) and inhibit non-hydrocarbon compounds (about 63%) of volatile products. In brief, co-pyrolysis of KW and TW could be a potential way for improving quality of pyrolysis oil.
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Affiliation(s)
- Jiawei Chen
- Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, School of Electric Power, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou 510640, China
| | - Xiaoqian Ma
- Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, School of Electric Power, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou 510640, China.
| | - Zhaosheng Yu
- Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, School of Electric Power, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou 510640, China
| | - Tonghui Deng
- Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, School of Electric Power, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou 510640, China
| | - Xinfei Chen
- Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, School of Electric Power, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou 510640, China
| | - Lin Chen
- Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, School of Electric Power, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou 510640, China
| | - Minquan Dai
- Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, School of Electric Power, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou 510640, China
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Meng X, Lin C, Zhang Y, Qin H, Cao S, Duan L. Mass Transfer Behavior of Benzene in Hierarchically Structured ZSM-5. Front Chem 2019; 7:502. [PMID: 31380347 PMCID: PMC6646413 DOI: 10.3389/fchem.2019.00502] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 07/01/2019] [Indexed: 11/13/2022] Open
Abstract
A series of ZSM-5 zeolites with hierarchical porous structure were synthesized using NaOH solutions treatment method. The structural and acidity properties of hierarchical ZSM-5 zeolites as-synthesized were characterized by X-ray diffraction (XRD), N2 adsorption, scanning electron microscope (SEM), NH3-temperature programmed desorption (TPD), and pyridine Fourier transform infrared spectroscopy (Py-FTIR). The adsorption and diffusion performances of benzene in hierarchical ZSM-5 zeolites were studied by an intelligent gravimetric analyzer (IGA). It was found that mass transfer (adsorption and diffusion) performance of benzene was significantly affected by synergetic effect of hierarchical structure, acid amount, acidity, adsorption sites of ZSM-5 zeolites. After suitable alkali treatment, the crystal structure of ZSM-5 was retained and finely tailored. Hierarchical ZSM-5 was obtained with a uniform size of mesoporous and microporous structure. Acidity of hierarchical ZSM-5 zeolites was improved, which produced more adsorption sites and thus increased the adsorption performance of benzene in hierarchical ZSM-5. As a result, connectivity in hierarchical ZSM-5 was improved with increasing of mesopores in hierarchical ZSM-5. Hierarchical ZSM-5 well-contributed to the adsorption performance of benzene on active sites and improved catalytic performance of hierarchical ZSM-5.
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Affiliation(s)
- Xiuhong Meng
- Department of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming, China
| | - Chunhui Lin
- Department of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming, China
| | - Youhua Zhang
- Department of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming, China
| | - Huibo Qin
- Department of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming, China
| | - Shui Cao
- Department of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming, China
| | - Linhai Duan
- Department of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming, China
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Li R, Chong S, Altaf N, Gao Y, Louis B, Wang Q. Synthesis of ZSM-5/Siliceous Zeolite Composites for Improvement of Hydrophobic Adsorption of Volatile Organic Compounds. Front Chem 2019; 7:505. [PMID: 31380349 PMCID: PMC6647869 DOI: 10.3389/fchem.2019.00505] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 07/02/2019] [Indexed: 11/23/2022] Open
Abstract
In this research, we investigated the hydrophobicity and dynamic adsorption-desorption behaviors of volatile organic compounds (VOCs) by applying different optimized coating dosage (25, 50, and 75%) on designed novel ZSM-5/MCM-41 and ZSM-5/Silicalite-1 hierarchical composites. The relatively large specific surface area and pore volume of adsorbents ZSM-5/MCM-41 and ZSM-5/Silicalite-1 composites with excellent stability were affirmed by ex-situ XRD, FTIR, BET, SEM, and water contact angle analyses. Regarding, toluene adsorption-desorption investigation, ZSM-5/MCM-41 composite lead a longer stable toluene breakthrough time no matter under dry or 50% humid conditions. However, under different loading dosage condition, the breakthrough time of 75% coating ratio was the longest, which was 1.6 times as long as that of pure ZSM-5 under wet adsorption. Meanwhile, the complete elimination of toluene for ZSM-5/MCM-41-75% was done by largest desorption peak area and the lowest desorption temperature of 101.9°C, while, the largest contact angle of ZSM-5/MCM-41-75% was 17.0° higher than pure ZSM-5 zeolite. Therefore, we believe that the present hydrophobic sorbent will provide new insight with great research potential for removing low concentration of VOCs at industrial scale.
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Affiliation(s)
- Renna Li
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, China
| | - Shijia Chong
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, China
| | - Naveed Altaf
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, China
| | - Yanshan Gao
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, China
| | - Benoit Louis
- ICPEES - Institut de Chimie et Procédés pour l'Énergie, l'Environnement et la Santé, UMR 7515 CNRS - Université de Strasbourg, Strasbourg, France
| | - Qiang Wang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, China
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Hernando H, Hernández-Giménez AM, Gutiérrez-Rubio S, Fakin T, Horvat A, Danisi RM, Pizarro P, Fermoso J, Heracleous E, Bruijnincx PCA, Lappas AA, Weckhuysen BM, Serrano DP. Scaling-Up of Bio-Oil Upgrading during Biomass Pyrolysis over ZrO 2 / ZSM-5-Attapulgite. ChemSusChem 2019; 12:2428-2438. [PMID: 30912622 DOI: 10.1002/cssc.201900534] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 03/22/2019] [Indexed: 06/09/2023]
Abstract
Ex situ catalytic biomass pyrolysis was investigated at both laboratory and bench scale by using a zeolite ZSM-5-based catalyst for selectively upgrading the bio-oil vapors. The catalyst consisted of nanocrystalline ZSM-5, modified by incorporation of ZrO2 and agglomerated with attapulgite (ZrO2 /n-ZSM-5-ATP). Characterization of this material by means of different techniques, including CO2 and NH3 temperature-programmed desorption (TPD), NMR spectroscopy, UV/Vis microspectroscopy, and fluorescence microscopy, showed that it possessed the right combination of accessibility and acid-base properties for promoting the conversion of the bulky molecules formed by lignocellulose pyrolysis and their subsequent deoxygenation to upgraded liquid organic fractions (bio-oil). The results obtained at the laboratory scale by varying the catalyst-to-biomass ratio (C/B) indicated that the ZrO2 /n-ZSM-5-ATP catalyst was more efficient for bio-oil deoxygenation than the parent zeolite n-ZSM-5, producing upgraded bio-oils with better combinations of mass and energy yields with respect to the oxygen content. The excellent performance of the ZrO2 /n-ZSM-5-ATP system was confirmed by working with a continuous bench-scale plant. The scale-up of the process, even with different raw biomasses as the feedstock, reaction conditions, and operation modes, was in line with the laboratory-scale results, leading to deoxygenation degrees of approximately 60 % with energy yields of approximately 70 % with respect to those of the thermal bio-oil.
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Affiliation(s)
- Héctor Hernando
- Thermochemical Processes Unit, IMDEA Energy Institute, 28935, Móstoles, Madrid, Spain
- Chemical and Environmental Engineering Group, ESCET, Rey Juan Carlos University, 28933, Móstoles, Madrid, Spain
| | - Ana M Hernández-Giménez
- Inorganic Chemistry and Catalysis group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584, CG, Utrecht, The Netherlands
| | | | - Tomaz Fakin
- SILKEM, d.o.o., Tovarniška cesta 10, SI-2325, Kidričevo, Slovenia
| | - Andrej Horvat
- SILKEM, d.o.o., Tovarniška cesta 10, SI-2325, Kidričevo, Slovenia
| | - Rosa M Danisi
- Institute of Applied Geosciences-Technical Petrophysics, Karlsruhe Institute of Technology, Adenauerring 20b, 76131, Karlsruhe, Germany
| | - Patricia Pizarro
- Thermochemical Processes Unit, IMDEA Energy Institute, 28935, Móstoles, Madrid, Spain
- Chemical and Environmental Engineering Group, ESCET, Rey Juan Carlos University, 28933, Móstoles, Madrid, Spain
| | - Javier Fermoso
- Thermochemical Processes Unit, IMDEA Energy Institute, 28935, Móstoles, Madrid, Spain
| | - Eleni Heracleous
- Chemical Process and Energy Resource Institute (CPERI), Centre for Research and Technology Hellas (CERTH), 57001, Thermi, Thessaloniki, Greece
| | - Pieter C A Bruijnincx
- Inorganic Chemistry and Catalysis group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584, CG, Utrecht, The Netherlands
| | - Angelos A Lappas
- Chemical Process and Energy Resource Institute (CPERI), Centre for Research and Technology Hellas (CERTH), 57001, Thermi, Thessaloniki, Greece
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584, CG, Utrecht, The Netherlands
| | - David P Serrano
- Thermochemical Processes Unit, IMDEA Energy Institute, 28935, Móstoles, Madrid, Spain
- Chemical and Environmental Engineering Group, ESCET, Rey Juan Carlos University, 28933, Móstoles, Madrid, Spain
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Shang C, Wu Z, Wu WD, Chen XD. Chemical Crosslinking Assembly of ZSM-5 Nanozeolites into Uniform and Hierarchically Porous Microparticles for High-Performance Acid Catalysis. ACS Appl Mater Interfaces 2019; 11:16693-16703. [PMID: 30983328 DOI: 10.1021/acsami.9b01681] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Hierarchically porous zeolites combining the advantages of desirable mass transport of nanozeolites and easy separation and handling of micro-zeolites are ideal candidates in catalytic applications. Facile routes for the assembly of zeolite microparticles with hierarchical porosity and high mechanical strength are much expected. Herein, based on a microfluidic jet spray drying technology, we report a facile and scalable chemical crosslinking assembly strategy for the synthesis of hierarchical zeolite microparticles by directly using the conventional as-synthesized nanozeolite suspension as a precursor. This route not only avoids the energy-intensive centrifugal separation process of nanozeolites but also significantly increases the uniformity and mechanical strength of the microparticles. The soluble aluminosilicate species act as a stabilizer to improve the droplet stability during the drying process and then as a "cross-linker" to chemically bind and interconnect zeolite nanoparticles to form robust bodies after drying and calcination. Zeolite microparticles with variable morphologies (spherical, bowl-like, and dimpled) and uniform and controllable sizes (from 70 to 108 μm) can be obtained by adjusting the experimental parameters. The particle formation mechanism is discussed based on the zeolite microparticles obtained from the purified nanozeolite suspension as a control. The zeolite microparticles possess emerged uniform mesopores (∼6 nm) and a well-maintained high surface area, large pore volume, high microporosity, and strong acidity of the original nanozeolites. As a result, they exhibit excellent acid catalytic performances in acetolysis of epichlorohydrin and catalytic cracking of low-density polyethylene, far better than those of the commercial ZSM-5.
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Affiliation(s)
- Chao Shang
- School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou , Jiangsu 215123 , P. R. China
| | - Zhangxiong Wu
- School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou , Jiangsu 215123 , P. R. China
| | - Winston Duo Wu
- School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou , Jiangsu 215123 , P. R. China
| | - Xiao Dong Chen
- School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou , Jiangsu 215123 , P. R. China
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