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Tan R, Ji Q, Ling Y, Li L. Advances in liquid organic hydrogen carriers: developing efficient dehydrogenation strategies. Chem Commun (Camb) 2024; 60:8186-8203. [PMID: 38994588 DOI: 10.1039/d4cc02057j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2024]
Abstract
In pursuit of global carbon neutrality, countries are intensifying their efforts to harness clean energy sources. Hydrogen emerges as a superior alternative to traditional fossil fuels and plays a crucial role in the global energy shift. Liquid Organic Hydrogen Carrier (LOHC) systems are lauded for their high hydrogen storage capacity, ease of handling, and safe and efficient transportation, positioning them as effective solutions for extensive hydrogen storage and international distribution. Nevertheless, the dehydrogenation of hydrogen-rich LOHCs is slow, requiring high temperatures and substantial energy inputs. Addressing these challenges by reducing energy demands and improving dehydrogenation rates is essential for advancing LOHC technology. This paper comprehensively examines various LOHC systems, focusing on the selection of carriers and dehydrogenation catalysts, and their dehydrogenation efficacy. It also highlights our recent contributions in photocatalytic LOHC and outlines future research directions to enhance LOHC technology.
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Affiliation(s)
- Ruike Tan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.
- College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
| | - Qing Ji
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.
- College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
| | - Yanni Ling
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.
- College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, People's Republic of China
| | - Lu Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.
- College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
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Zhang J, Yang F, Wang B, Li D, Wei M, Fang T, Zhang Z. Heterogeneous Catalysts in N-Heterocycles and Aromatics as Liquid Organic Hydrogen Carriers (LOHCs): History, Present Status and Future. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16103735. [PMID: 37241361 DOI: 10.3390/ma16103735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/04/2023] [Accepted: 04/13/2023] [Indexed: 05/28/2023]
Abstract
The continuous decline of traditional fossil energy has cast the shadow of an energy crisis on human society. Hydrogen generated from renewable energy sources is considered as a promising energy carrier, which can effectively promote the energy transformation of traditional high-carbon fossil energy to low-carbon clean energy. Hydrogen storage technology plays a key role in realizing the application of hydrogen energy and liquid organic hydrogen carrier technology, with many advantages such as storing hydrogen efficiently and reversibly. High-performance and low-cost catalysts are the key to the large-scale application of liquid organic hydrogen carrier technology. In the past few decades, the catalyst field of organic liquid hydrogen carriers has continued to develop and has achieved some breakthroughs. In this review, we summarized recent significant progress in this field and discussed the optimization strategies of catalyst performance, including the properties of support and active metals, metal-support interaction and the combination and proportion of multi-metals. Moreover, the catalytic mechanism and future development direction were also discussed.
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Affiliation(s)
- Jinxu Zhang
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Fusheng Yang
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China
- Shaanxi Hydrotransformer Energy Technologies Co., Ltd., Xi'an 712000, China
| | - Bin Wang
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China
- Shaanxi Hydrotransformer Energy Technologies Co., Ltd., Xi'an 712000, China
| | - Dong Li
- SPIC Guangzhou Branch, Guangzhou 511458, China
| | - Min Wei
- SPIC Guangzhou Branch, Guangzhou 511458, China
| | - Tao Fang
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China
- Shaanxi Hydrotransformer Energy Technologies Co., Ltd., Xi'an 712000, China
| | - Zaoxiao Zhang
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China
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3
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Li Y, Ma Y, Zhang Q, Kondratenko VA, Jiang G, Sun H, Han S, Wang Y, Cui G, Zhou M, Huan Q, Zhao Z, Xu C, Jiang G, Kondratenko EV. Molecularly Defined Approach for Preparation of Ultrasmall Pt-Sn Species for Efficient Dehydrogenation of Propane to Propene. J Catal 2023. [DOI: 10.1016/j.jcat.2023.01.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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4
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Feng F, Zhang H, Chu S, Zhang Q, Wang C, Wang G, Wang F, Bing L, Han D. Recent progress on the traditional and emerging catalysts for propane dehydrogenation. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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5
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Chen Q, Deng L, Wu Z, Wang F, Jiang X. Mesoporous Silica SBA-15 Supported Pt–Ga Nanoalloys as an Active and Stable Catalyst for Propane Dehydrogenation. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qiao Chen
- Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Lab of Novel Reaction & Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
| | - Lidan Deng
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zewei Wu
- Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Lab of Novel Reaction & Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
| | - Fang Wang
- Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Lab of Novel Reaction & Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
| | - Xingmao Jiang
- Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Lab of Novel Reaction & Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
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6
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Ye HL, Liu SX, Zhang C, Cai YQ, Shi YF. Dehydrogenation of methylcyclohexane over Pt-based catalysts supported on functional granular activated carbon. RSC Adv 2021; 11:29287-29297. [PMID: 35479578 PMCID: PMC9040619 DOI: 10.1039/d1ra05480e] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 08/20/2021] [Indexed: 11/21/2022] Open
Abstract
Herein, we developed the dehydrogenation of methylcyclohexane over Pt-based catalysts supported on functional granular activated carbon. Sulphuric acid, hydrogen peroxide, nitric acid and aminopropyl triethoxy silane were adopted to modify the granular activated carbon. The structural characterizations suggested that the carbon materials had a large surface area, abundant pore structure, and a high number of oxygen-containing functional groups, which influenced the Pt-based catalysts on the particle size, dispersion and dehydrogenation activity. The hydrogen temperature-programmed reduction technique was utilized to investigate the interaction between the active component Pt and the various functionalized granular activated carbon materials. The CO pulse technique revealed the particle sizes and dispersion of the as-prepared Pt-based catalysts. Finally, the Pt-based catalysts were successfully applied to study their catalytic activity in the dehydrogenation reaction of methylcyclohexane. The results showed that the Pt-based catalyst over granular activated carbon functionalized with sulphuric acid groups had a higher conversion of methylcyclohexane (63%) and a larger hydrogen evolution rate (741.1 mmol gPt -1 min-1) than the other resulting Pt-based catalysts at 300 °C.
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Affiliation(s)
- Hong-Li Ye
- Laboratory of Aquatic Product Quality, Safety and Processing, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences Shanghai 200090 China .,Institute of New Catalytic Materials Science, MOE Key Laboratory of Advanced Energy Materials Chemistry, School of Materials Science and Engineering, National Institute of Advanced Materials, Nankai University Tianjin 300350 China
| | - Shuang-Xi Liu
- Institute of New Catalytic Materials Science, MOE Key Laboratory of Advanced Energy Materials Chemistry, School of Materials Science and Engineering, National Institute of Advanced Materials, Nankai University Tianjin 300350 China .,Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
| | - Cui Zhang
- Institute of New Catalytic Materials Science, MOE Key Laboratory of Advanced Energy Materials Chemistry, School of Materials Science and Engineering, National Institute of Advanced Materials, Nankai University Tianjin 300350 China .,Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
| | - You-Qiong Cai
- Laboratory of Aquatic Product Quality, Safety and Processing, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences Shanghai 200090 China
| | - Yong-Fu Shi
- Laboratory of Aquatic Product Quality, Safety and Processing, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences Shanghai 200090 China
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Huang H, Nassr ABAA, Celorrio V, Gianolio D, Hardacre C, Brett DJL, Russell AE. Contrasting the EXAFS obtained under air and H 2 environments to reveal details of the surface structure of Pt-Sn nanoparticles. Phys Chem Chem Phys 2021; 23:11738-11745. [PMID: 33982041 DOI: 10.1039/d1cp00979f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Understanding the surface structure of bimetallic nanoparticles is crucial for heterogeneous catalysis. Although surface contraction has been established in monometallic systems, less is known for bimetallic systems, especially of nanoparticles. In this work, the bond length contraction on the surface of bimetallic nanoparticles is revealed by XAS in H2 at room temperature on dealloyed Pt-Sn nanoparticles, where most Sn atoms were oxidized and segregated to the surface when measured in air. The average Sn-Pt bond length is found to be ∼0.09 Å shorter than observed in the bulk. To ascertain the effect of the Sn location on the decrease of the average bond length, Pt-Sn samples with lower surface-to-bulk Sn ratios than the dealloyed Pt-Sn were studied. The structural information specifically from the surface was extracted from the averaged XAS results using an improved fitting model combining the data measured in H2 and in air. Two samples prepared so as to ensure the absence of Sn in the bulk were also studied in the same fashion. The bond length of surface Sn-Pt and the corresponding coordination number obtained in this study show a nearly linear correlation, the origin of which is discussed and attributed to the poor overlap between the Sn 5p orbitals and the available orbitals of the Pt surface atoms.
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Affiliation(s)
- Haoliang Huang
- School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, UK.
| | - Abu Bakr Ahmed Amine Nassr
- School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, UK. and Fraunhofer Institute for Microstructure of Materials and System, Walter-Hülse-Straße 1, 06120 Halle (Saale), Germany
| | - Verónica Celorrio
- Diamond Light Source Ltd. Diamond House, Harwell Campus, Didcot, OX11 0DE, UK
| | - Diego Gianolio
- Diamond Light Source Ltd. Diamond House, Harwell Campus, Didcot, OX11 0DE, UK
| | - Christopher Hardacre
- School of Natural Sciences, The University of Manchester, The Mill, Manchester, M13 9PL, UK
| | - Dan J L Brett
- Department of Chemical Engineering, University College London (UCL), London, WC1E 7JE, UK
| | - Andrea E Russell
- School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, UK.
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Jiang H, Li G, Wang J, Wang S. Preparation of highly dispersed Pt–Sn/Al2O3 catalysts via supercritical fluid deposition and their catalytic performance. NEW J CHEM 2021. [DOI: 10.1039/d1nj00108f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Highly dispersed Pt–Sn/Al2O3, which shows excellent catalytic performance was produced by SFD and their particle size effect was studied.
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Affiliation(s)
- Haoxi Jiang
- Key Laboratory for Green Chemical Technology of Ministry of Education
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Guangshen Li
- Key Laboratory for Green Chemical Technology of Ministry of Education
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Jing Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Sheng Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
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Natarajan P, Khan HA, Jaleel A, Park DS, Kang DC, Yoon S, Jung KD. The pronounced effect of Sn on RhSn catalysts for propane dehydrogenation. J Catal 2020. [DOI: 10.1016/j.jcat.2020.09.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Miao L, Yan J, Wang W, Huang Y, Li W, Yang Y. Dehydrogenation of methylcyclohexane over Pt supported on Mg–Al mixed oxides catalyst: The effect of promoter Ir. Chin J Chem Eng 2020. [DOI: 10.1016/j.cjche.2020.05.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Zhang W, Qian J, Lei Y, Zhang C, Ma J. Simple synthesis of hierarchically porous Sn/TiO 2/graphitic carbon microspheres for CO 2 reduction with H 2O under simulated solar irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:22631-22638. [PMID: 32319059 DOI: 10.1007/s11356-020-08732-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 04/02/2020] [Indexed: 06/11/2023]
Abstract
A simple colloidal crystal template method was used to prepare Sn/TiO2/graphite carbon microsphere composites (xSn/TiO2/GCM, x = 2.0, 1.0, 0.2, 0.5) with porous layers. Then, the composites were represented using X-ray diffraction, energy dispersive spectrometry, scanning electron microscopy, transmission electron microscopy, and nitrogen physical adsorption/desorption. Meanwhile, the photocatalytic activities in CO2 reduction were studied under simulation of visible light exposure. It was confirmed that the Sn/TiO2/GCM composites had layered porosity, graphitized carbon matrix, and high metal compound content, and their morphology was greatly affected by the acetone amount. The outputs of CO and CH4 coming into the photocatalytic CO2 reduction reaction of Sn/TiO2/GCM were 619.46 and 14.46 μmol g-1, respectively. Among the two products, the highest production rate observed in 0.5Sn/TiO2/GCM. Because of these factors, the layered porous Sn/TiO2/GCM composites have good photocatalytic performance under simulated visible light irradiation and have unique composition and structure characteristics, which give broad application prospects in electrode materials, catalysts, and adsorbents. Graphical abstract.
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Affiliation(s)
- Weiping Zhang
- College of Environment and Planning, Henan University, Kaifeng, 475001, China
| | - Jing Qian
- College of Environment and Planning, Henan University, Kaifeng, 475001, China
| | - Yuchen Lei
- College of Environment and Planning, Henan University, Kaifeng, 475001, China
| | - Chengli Zhang
- College of Environment and Planning, Henan University, Kaifeng, 475001, China.
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, Henan University, Kaifeng, 475001, China.
- National Demonstration Center for Environmental and Planning, Henan University, Kaifeng, 475001, China.
- Henan Engineering Research Center for Control & Remediation of Soil Heavy Metal Pollution, Kaifeng, 475001, China.
| | - Jianhua Ma
- College of Environment and Planning, Henan University, Kaifeng, 475001, China
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, Henan University, Kaifeng, 475001, China
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12
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Feng S, Yi J, Miura H, Nakatani N, Hada M, Shishido T. Experimental and Theoretical Investigation of the Role of Bismuth in Promoting the Selective Oxidation of Glycerol over Supported Pt–Bi Catalyst under Mild Conditions. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00974] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Shixiang Feng
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Jun Yi
- Department of Chemistry, Graduate School of Sciences, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Hiroki Miura
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan
- Research Center for Hydrogen Energy-Based Society, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan
- Elements Strategy Initiative for Catalysts & Batteries, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8520, Japan
| | - Naoki Nakatani
- Department of Chemistry, Graduate School of Sciences, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Masahiko Hada
- Department of Chemistry, Graduate School of Sciences, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Tetsuya Shishido
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan
- Research Center for Hydrogen Energy-Based Society, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan
- Elements Strategy Initiative for Catalysts & Batteries, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8520, Japan
- Research Center for Gold Chemistry, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan
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Li X, Yin H, Zhang J, Liu J, Chen G. Effect of organic template removal approaches on physiochemical characterization of Ni/Al-SBA-15 and eugenol hydrodeoxygenation. J SOLID STATE CHEM 2020. [DOI: 10.1016/j.jssc.2019.121063] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
The effect of the Pt–Sn/α-Al2O3 catalyst reduction method on dehydrogenation of mixed-light paraffins to olefins has been studied in this work. Pt–Sn/α-Al2O3 catalysts were prepared by two different methods: (a) liquid phase reduction with NaBH4 and (b) gas phase reduction with hydrogen. The catalytic performance of these two catalysts for dehydrogenation of paraffins was compared. Also, the synergy between the catalyst reduction method and mixed-paraffin feed (against individual paraffin feed) was studied. The catalysts were examined using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and Brunauer–Emmett–Teller (BET) analysis. The individual and mixed-paraffin feed dehydrogenation experiments were carried out in a packed bed reactor fabricated from Inconel 600, operating at 600 °C and 10 psi pressure. The dehydrogenation products were analyzed using an online gas chromatograph (GC) with flame ionization detector (FID). The total paraffin conversion and olefin selectivity for individual paraffin feed (propane only and butane only) and mixed-paraffin feed were compared. The conversion of propane only feed was found to be 10.7% and 9.9%, with olefin selectivity of 499% and 490% for NaBH4 and hydrogen reduced catalysts, respectively. The conversion of butane only feed was found to be 24.4% and 23.3%, with olefin selectivity of 405% and 418% for NaBH4 and hydrogen reduced catalysts, respectively. The conversion of propane and butane during mixed-feed dehydrogenation was measured to be 21.4% and 30.6% for the NaBH4 reduced catalyst, and 17.2%, 22.4% for the hydrogen reduced catalyst, respectively. The olefin selectivity was 422% and 415% for NaBH4 and hydrogen reduced catalysts, respectively. The conversions of propane and butane for mixed-paraffin feed were found to be higher when compared with individual paraffin dehydrogenation. The thermogravimetric studies of used catalysts under oxygen atmosphere showed that the amount of coke deposited during mixed-paraffin feed is less compared with individual paraffin feed for both catalysts. The study showed NaBH4 as a simple and promising alternative reduction method for the synthesis of Pt–Sn/Al2O3 catalyst for paraffin dehydrogenation. Further, the studies revealed that mixed-paraffin feed dehydrogenation gave higher conversions without significantly affecting olefin selectivity.
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Chen S, Xu Z, Tan D, Pan D, Cui X, Qiao Y, Li R. Oxidative dehydrogenation of ethylbenzene to styrene with CO2over Al‐MCM‐41‐supported vanadia catalysts. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5396] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Shuwei Chen
- College of Chemistry and Chemical EngineeringTaiyuan University of Technology Taiyuan 030024 China
| | - Zheqi Xu
- College of Chemistry and Chemical EngineeringTaiyuan University of Technology Taiyuan 030024 China
| | - Dongchen Tan
- College of Chemistry and Chemical EngineeringTaiyuan University of Technology Taiyuan 030024 China
| | - Dahai Pan
- College of Chemistry and Chemical EngineeringTaiyuan University of Technology Taiyuan 030024 China
| | - Xingyu Cui
- College of Chemistry and Chemical EngineeringTaiyuan University of Technology Taiyuan 030024 China
| | - Yan Qiao
- State Key Laboratory of Coal ConversionInstitute of Coal Chemistry, Chinese Academy of Sciences Taiyuan 030001 China
| | - Ruifeng Li
- College of Chemistry and Chemical EngineeringTaiyuan University of Technology Taiyuan 030024 China
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Abstract
Pt–Sn/Al2O3 catalysts were prepared by the direct reduction method at temperatures from 450 to 900 °C, denoted as an SR series (SR450 to SR900 according to reduction temperature). Direct reduction was performed immediately after catalyst drying without a calcination step. The activity of SR catalysts and a conventionally prepared (Cal600) catalyst were compared to evaluate its effect on direct reduction. Among the SR catalysts, SR550 showed overall higher conversion of propane and propylene selectivity than Cal600. The nano-sized dispersion of metals on SR550 was verified by transmission electron microscopy (TEM) observation. The phases of the bimetallic Pt–Sn alloys were examined by X-ray diffraction, TEM, and energy dispersive X-ray spectroscopy (EDS). Two characteristic peaks of Pt3Sn and PtSn alloys were observed in the XRD patterns, and these phases affected the catalytic performance. Moreover, EDS confirmed the formation of Pt3Sn and PtSn alloys on the catalyst surface. In terms of catalytic activity, the Pt3Sn alloy showed better performance than the PtSn alloy. Relationships between the intermetallic interactions and catalytic activity were investigated using X-ray photoelectron spectroscopy. Furthermore, qualitative analysis of coke formation was conducted after propane dehydrogenation using differential thermal analysis.
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