1
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Soheili S, Nakhaei Pour A, Mohammadi A, Murzin DY. Effect of CNT over structural properties of SAPO-34 in MTO process: Experimental and molecular simulation studies. J Mol Graph Model 2023; 124:108555. [PMID: 37348451 DOI: 10.1016/j.jmgm.2023.108555] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 05/01/2023] [Accepted: 06/16/2023] [Indexed: 06/24/2023]
Abstract
The hierarchical silicoaluminophosphate (SAPO-34) catalyst was synthesized using the mixtures of diethylamine (D) and butylamine (B) as a structure-directing agent (SDA), and carbon nanotube (CNT) as a secondary template in the hydrothermal method. The catalysts were characterized by Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), N2 physisorption, and temperature-programmed desorption of ammonia (NH3-TPD) techniques and evaluated for the catalytic activity in the Methanol to Olefins (MTO) process. The results showed that the use of CNT as the secondary template improved the hierarchical structure of SAPO-34 due to increasing the external surface area and mesoporosity and decreasing the particle size and as a result, made better the performance of the prepared SAPO-34 zeolite in the MTO process. Among all the prepared samples, the CNT-B-D catalyst synthesized by mixing three templates displayed the highest ethylene and propylene selectivity of 49% and 34%, respectively. Also, using CNT in the synthesis of samples increased the catalytic stability. In addition, pure, binary, and ternary adsorption isotherms and diffusivities of the main products and reactants over the SAPO-34 were investigated by theoretical measurements, because sorption and diffusion affect the catalyst stability and C2-C3 selectivity in the MTO reaction. The higher diffusion rate of ethylene leads to following the aromatic-based cycle in the MTO process.
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Affiliation(s)
- Saeedeh Soheili
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, 9177948974, Iran
| | - Ali Nakhaei Pour
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, 9177948974, Iran.
| | - Ali Mohammadi
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, 9177948974, Iran
| | - Dmitry Yu Murzin
- Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre (PCC), Åbo Akademi University, 20500, Turku/Åbo, Finland
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2
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Pan Z, Puente-Urbina A, Batool SR, Bodi A, Wu X, Zhang Z, van Bokhoven JA, Hemberger P. Tuning the zeolite acidity enables selectivity control by suppressing ketene formation in lignin catalytic pyrolysis. Nat Commun 2023; 14:4512. [PMID: 37500623 PMCID: PMC10374901 DOI: 10.1038/s41467-023-40179-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 07/12/2023] [Indexed: 07/29/2023] Open
Abstract
Unveiling catalytic mechanisms at a molecular level aids rational catalyst design and selectivity control for process optimization. In this study, we find that the Brønsted acid site density of the zeolite catalyst efficiently controls the guaiacol catalytic pyrolysis mechanism. Guaiacol demethylation to catechol initiates the reaction, as evidenced by the detected methyl radicals. The mechanism branches to form either fulvenone (c-C5H4 = C = O), a reactive ketene intermediate, by catechol dehydration, or phenol by acid-catalyzed dehydroxylation. At high Brønsted acid site density, fulvenone formation is inhibited due to surface coordination configuration of its precursor, catechol. By quantifying reactive intermediates and products utilizing operando photoelectron photoion coincidence spectroscopy, we find evidence that ketene suppression is responsible for the fivefold phenol selectivity increase. Complementary fulvenone reaction pathway calculations, along with 29Si NMR-MAS spectroscopy results corroborate the mechanism. The proposed, flexible operando approach is applicable to a broad variety of heterogeneous catalytic reactions.
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Affiliation(s)
- Zeyou Pan
- Paul Scherrer Institute, Forschungsstrasse 111, CH-5232, Villigen PSI, Switzerland
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Allen Puente-Urbina
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
- Renewable Resources and Enabling Sciences Center, National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - Syeda Rabia Batool
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Andras Bodi
- Paul Scherrer Institute, Forschungsstrasse 111, CH-5232, Villigen PSI, Switzerland
| | - Xiangkun Wu
- Paul Scherrer Institute, Forschungsstrasse 111, CH-5232, Villigen PSI, Switzerland
| | - Zihao Zhang
- Paul Scherrer Institute, Forschungsstrasse 111, CH-5232, Villigen PSI, Switzerland
| | - Jeroen A van Bokhoven
- Paul Scherrer Institute, Forschungsstrasse 111, CH-5232, Villigen PSI, Switzerland.
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland.
| | - Patrick Hemberger
- Paul Scherrer Institute, Forschungsstrasse 111, CH-5232, Villigen PSI, Switzerland.
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3
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Brooks A, Jenkins SJ, Wrabetz S, McGregor J, Sacchi M. The dehydrogenation of butane on metal-free graphene. J Colloid Interface Sci 2022; 619:377-387. [DOI: 10.1016/j.jcis.2022.03.128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 03/21/2022] [Accepted: 03/27/2022] [Indexed: 10/18/2022]
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4
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Matveenko ES, Grigoriev MV, Kremleva TA, Andrusenko EV, Kosinov NA. Methods for Studies of Reactions on Zeolite Catalysts Occurring by the Hydrocarbon Pool Mechanism. KINETICS AND CATALYSIS 2022. [DOI: 10.1134/s0023158422040061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Gashoul Daresibi F, Khodadadi AA, Mortazavi Y, Huotari S, Ritala M. Highly dispersed atomic layer deposited CrOx on SiO2 catalyst with enhanced yield of propylene for CO2 –mediated oxidative dehydrogenation of propane. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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6
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Zhang X, Chen Z, Cheng L, Xu L, Bi X, Liu Q. Valorization of fluid petroleum coke for efficient catalytic destruction of biomass gasification tar. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127297. [PMID: 34601413 DOI: 10.1016/j.jhazmat.2021.127297] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 09/05/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
Large volumes of waste petroleum coke stockpiled in open yard not only represent a huge loss of valuable material but also pose a significant risk to the environment. This work proposed an innovative strategy for waste petroleum coke valorization by exploring its catalytic performance of biomass gasification tar destruction. Waste petroleum coke was firstly activated by potassium hydroxide (KOH) to obtain high specific surface area as well as low sulfur and ash contents. Petroleum coke derived catalyst showed superior performance than a commercial activated carbon derived catalyst for destruction of naphthalene as the tar model compound. The petroleum coke derived catalyst exhibited 99.1% naphthalene destruction efficiency at 800 °C but deactivated quickly under N2 atmosphere. Under H2 and steam atmospheres, the catalytic activities were 98.6% and 96.5% for 8 h, respectively. To study the correlation between catalytic performance and the structure of carbon catalyst, elemental analysis, scanning electron microscope (SEM) analysis, transmission electron microscope (TEM) analysis, X-ray powder diffraction (XRD) analysis, Brunauer-Emmett-Teller method (BET) analysis, Fourier transform infrared (FTIR) spectroscopy, temperature programmed oxidation (TPO) analysis and Raman spectroscopy were performed on both fresh and spent catalysts. Results demonstrated that the hydrogen-rich groups (small rings and amorphous carbon) and oxygen-containing groups may account for the good resistance to coke deposition under H2 and steam atmospheres.
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Affiliation(s)
- Xurui Zhang
- Clean Energy Research Center, Department of Chemical and Biological Engineering, The University of British Columbia, BC V6T 1Z3, Canada; State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zezhou Chen
- College of Engineering, Huzhou University, Huzhou 313000, China
| | - Long Cheng
- Clean Energy Research Center, Department of Chemical and Biological Engineering, The University of British Columbia, BC V6T 1Z3, Canada
| | - Linlin Xu
- Department of Chemical Engineering, University College London, London WC1E 7JE, UK
| | - Xiaotao Bi
- Clean Energy Research Center, Department of Chemical and Biological Engineering, The University of British Columbia, BC V6T 1Z3, Canada.
| | - Qingya Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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7
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Beale AM, Lezcano-González I, Cong P, Campbell E, Panchal M, Agote-Arán M, Celorrio V, He Q, Oord R, Weckhuysen BM. Structure‐Activity Relationships in Highly Active Platinum‐Tin MFI‐type Zeolite Catalysts for Propane Dehydrogenation. ChemCatChem 2022. [DOI: 10.1002/cctc.202101828] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andrew M. Beale
- University College London Chemistry 20 Gordon Street WC1H 0AJ London UNITED KINGDOM
| | | | - Peixi Cong
- UCL: University College London Chemistry UNITED KINGDOM
| | - Emma Campbell
- UCL: University College London Chemistry UNITED KINGDOM
| | - Monik Panchal
- UCL: University College London Chemistry UNITED KINGDOM
| | | | | | - Qian He
- NUS: National University of Singapore Chemical and Biomolecular Engineering SINGAPORE
| | - Ramon Oord
- Utrecht University Faculty of Science: Universiteit Utrecht Faculteit Betawetenschappen Scheikunde NETHERLANDS
| | - Bert M. Weckhuysen
- Utrecht University Faculty of Science: Universiteit Utrecht Faculteit Betawetenschappen Scheikunde NETHERLANDS
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8
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Pavesi D, Dattila F, Van de Poll RC, Anastasiadou D, García-Muelas R, Figueiredo M, Gruter GJM, López N, Koper MT, Schouten KJP. Modulation of the selectivity of CO2 to CO electroreduction in palladium rich Palladium-Indium nanoparticles. J Catal 2021. [DOI: 10.1016/j.jcat.2021.08.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Wang P, Senftle TP. Modeling phase formation on catalyst surfaces: Coke formation and suppression in hydrocarbon environments. AIChE J 2021. [DOI: 10.1002/aic.17454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Peng Wang
- Department of Chemical and Biomolecular Engineering Rice University Houston Texas USA
| | - Thomas P. Senftle
- Department of Chemical and Biomolecular Engineering Rice University Houston Texas USA
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10
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Dehydroaromatization of methane over noble metal loaded Mo/H-ZSM-5 zeolite catalysts. APPLIED PETROCHEMICAL RESEARCH 2021. [DOI: 10.1007/s13203-021-00274-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
AbstractDehydroaromatization of methane (MDA) reaction was investigated over platinum modified Mo/H-ZSM-5 catalysts which were pre-carbided at 750 °C. The influence of platinum on the catalytic performance and product selectivity of Mo/H-ZSM-5 catalysts for the MDA reaction at 700 °C were studied. The presence of platinum led to a slight decrease in methane conversion from 7.5 to 4.2%. Aromatic selectivities above 90% were obtained with catalysts containing low platinum loadings (0.5 and 1.0 wt.%), with benzene being the most prominent product. A decrease in coke selectivity and coke deposits was noted with the platinum modified Mo/H-ZSM-5 zeolite catalysts. A comparative study was performed to compare platinum, palladium and ruthenium promoted Mo/H-ZSM-5 zeolite catalysts with un-promoted Mo/H-ZSM-5. The ruthenium promoted catalyst proved to be superior in catalytic performance, with a higher methane conversion obtained than that found for platinum promoted and palladium promoted Mo/H-ZSM-5 catalysts. Benzene selectivity of about 60% was obtained for ruthenium and palladium promoted Mo/H- ZSM-5 catalysts and the total aromatic selectivity was maintained at 90%. TGA results showed a total reduction of 50% by weight of carbon deposited on the promoted Mo/H-ZSM-5 catalyst.
Graphic abstract
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11
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A Comprehensive Study of Coke Deposits on a Pt-Sn/SBA-16 Catalyst during the Dehydrogenation of Propane. Catalysts 2021. [DOI: 10.3390/catal11010128] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Catalytic propane dehydrogenation is an attractive method to produce propylene while avoiding the issues of its traditional synthesis via naphtha steam cracking of naphtha. In this contribution, a series of Pt-Sn/SBA-16 catalysts were synthesized and evaluated for this purpose. Bimetallic Pt-Sn catalysts were more active than catalysts containing only Pt. The catalyst with the best performance was assessed at different reaction times of 0, 60, 180, and 300 min. The evolution of coke deposits was also studied. Thermogravimetric analysis demonstrated the presence of two types of coke on the catalyst surface at low and high temperature, respectively. Raman results showed an increased coke’s crystal size from 60 to 180 min on stream, and from 180 to 300 min under reaction, Raman suggested a reduction in the crystal size of coke. Also transmission electron microscopy confirmed a more evident agglomeration of metallic particles with reaction times higher than 180 min. These results are consistent with the phenomena called “coke migration” and the cause is often explained by coke movement near the particle to the support; it can also be explained due to sintering of the metallic particle, which we propose as a more suitable explanation.
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12
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Influence of Biochar Composition and Source Material on Catalytic Performance: The Carboxylation of Glycerol with CO2 as a Case Study. Catalysts 2020. [DOI: 10.3390/catal10091067] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The impact of the chemical and physical composition of biochar catalysts is demonstrated in the carboxylation of glycerol with carbon dioxide for the first time, using acetonitrile as a dehydrating agent. Biochars are an important emerging class of catalytic material that can readily be produced from low-value biomass residues; however, the impact of feedstock choice is often overlooked. The ash content of biochar from three different feedstocks is shown to be catalytically active for the production of glycerol carbonate and triacetin, whilst low-ash catalysts such as soft wood biochar and commercial activated charcoal are inactive. Following treatment with hydrochloric acid, yields of glycerol carbonate over ash were reduced by over 94%, and triacetin was no longer produced. This has been attributed to the loss of potassium content. Carbon content was shown to be catalytically active for the synthesis of diacetin, and graphitic carbon may be beneficial. Through the development of structure–performance relationships, biomass feedstocks with the most suitable properties can therefore be selected to produce biochars for specific catalytic applications. This would expand the range of reactions which can be effectively catalysed by these materials and enhance the development of a more circular and sustainable chemicals industry.
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13
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Regeneration of catalysts deactivated by coke deposition: A review. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(20)63552-5] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Gomez LQ, Shehab AK, Al‐Shathr A, Ingram W, Konstantinova M, Cumming D, McGregor J. H 2 -free Synthesis of Aromatic, Cyclic and Linear Oxygenates from CO 2. CHEMSUSCHEM 2020; 13:647-658. [PMID: 31794078 PMCID: PMC7027563 DOI: 10.1002/cssc.201902340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Revised: 11/11/2019] [Indexed: 06/10/2023]
Abstract
The synthesis of oxygenate products, including cyclic ketones and phenol, from carbon dioxide and water in the absence of gas-phase hydrogen has been demonstrated. The reaction takes place in subcritical conditions at 300 °C and pressure at room temperature of 25 barg. This is the first observation of the production of cyclic ketones by this route and represents a step towards the synthesis of valuable intermediates and products, including methanol, without relying on fossil sources or hydrogen, which carries a high carbon footprint in its production by conventional methods. Inspiration for these studies was taken directly from natural processes occurring in hydrothermal environments around ocean vents. Bulk iron and iron oxides were investigated to provide a benchmark for further studies, whereas reactions over alumina and zeolite-based catalysts were employed to demonstrate, for the first time, the ability to use catalyst properties such as acidity and pore size to direct the reaction towards specific products. Bulk iron and iron oxides produced methanol as the major product in concentrations of approximately 2-3 mmol L-1 . By limiting the hydrogen availability through increasing the initial CO2 /H2 O ratio the reaction could be directed to yield phenol. Alumina and zeolites were both observed to enhance the production of longer-chained species (up to C8 ), likely owing to the role of acid sites in catalysing rapid oligomerisation reactions. Notably, zeolite-based catalysts promoted the formation of cyclic ketones. These proof-of-concept studies show the potential of this process to contribute to sustainable development through either targeting methanol production as part of a "methanol economy" or longer-chained species including phenol and cyclic ketones.
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Affiliation(s)
- Laura Quintana Gomez
- University of SheffieldDepartment of Chemical and Biological EngineeringMappin StreetSheffieldS1 3JDUK
- BioEcoUVa Bioeconomy InstituteDepartment of Chemical Engineering and Environmental TechnologyUniversity of Valladolid47011ValladolidSpain
| | - Amal K. Shehab
- University of SheffieldDepartment of Chemical and Biological EngineeringMappin StreetSheffieldS1 3JDUK
| | - Ali Al‐Shathr
- University of SheffieldDepartment of Chemical and Biological EngineeringMappin StreetSheffieldS1 3JDUK
| | - William Ingram
- University of SheffieldDepartment of Chemical and Biological EngineeringMappin StreetSheffieldS1 3JDUK
| | - Mariia Konstantinova
- University of SheffieldDepartment of Chemical and Biological EngineeringMappin StreetSheffieldS1 3JDUK
| | - Denis Cumming
- University of SheffieldDepartment of Chemical and Biological EngineeringMappin StreetSheffieldS1 3JDUK
| | - James McGregor
- University of SheffieldDepartment of Chemical and Biological EngineeringMappin StreetSheffieldS1 3JDUK
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15
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Ba H, Tuci G, Evangelisti C, Ceppatelli M, Nguyen-Dinh L, Dal Santo V, Bossola F, Nhut JM, Rossin A, Granger P, Giambastiani G, Pham-Huu C. Second Youth of a Metal-Free Dehydrogenation Catalyst: When γ-Al2O3 Meets Coke Under Oxygen- and Steam-Free Conditions. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02555] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Housseinou Ba
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), UMR 7515 CNRS, University of Strasbourg (UdS), 25, rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Giulia Tuci
- Institute of Chemistry of Organometallic Compounds, ICCOM-CNR and Consorzio INSTM, Via Madonna del Piano 10, Sesto
F.no, 50019 Florence, Italy
| | - Claudio Evangelisti
- CNR—Istituto di Scienze e Tecnologie Molecolari, Via C. Golgi 19, 20133 Milano, Italy
| | - Matteo Ceppatelli
- Institute of Chemistry of Organometallic Compounds, ICCOM-CNR and Consorzio INSTM, Via Madonna del Piano 10, Sesto
F.no, 50019 Florence, Italy
- LENS, European Laboratory for Non-Linear Spectroscopy, Via N. Carrara 1, Sesto Fiorentino, I-50019 Firenze, Italy
| | - Lam Nguyen-Dinh
- The University of Da-Nang, University of Science and Technology, 54, Nguyen Luong Bang, 550000 Da-Nang, Vietnam
| | - Vladimiro Dal Santo
- CNR—Istituto di Scienze e Tecnologie Molecolari, Via C. Golgi 19, 20133 Milano, Italy
| | - Filippo Bossola
- CNR—Istituto di Scienze e Tecnologie Molecolari, Via C. Golgi 19, 20133 Milano, Italy
| | - Jean-Mario Nhut
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), UMR 7515 CNRS, University of Strasbourg (UdS), 25, rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Andrea Rossin
- Institute of Chemistry of Organometallic Compounds, ICCOM-CNR and Consorzio INSTM, Via Madonna del Piano 10, Sesto
F.no, 50019 Florence, Italy
| | - Pascal Granger
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181—Unité de Catalyse et Chimie du Solide (UCCS), F-59000 Lille, France
| | - Giuliano Giambastiani
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), UMR 7515 CNRS, University of Strasbourg (UdS), 25, rue Becquerel, 67087 Strasbourg Cedex 02, France
- Institute of Chemistry of Organometallic Compounds, ICCOM-CNR and Consorzio INSTM, Via Madonna del Piano 10, Sesto
F.no, 50019 Florence, Italy
- Kazan Federal University, Kremlyovskaya Street, 18, 420008 Kazan, Russian Federation
| | - Cuong Pham-Huu
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), UMR 7515 CNRS, University of Strasbourg (UdS), 25, rue Becquerel, 67087 Strasbourg Cedex 02, France
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16
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Condensation By-Products in Wet Peroxide Oxidation: Fouling or Catalytic Promotion? Part I. Evidences of an Autocatalytic Process. Catalysts 2019. [DOI: 10.3390/catal9060516] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The present work is aimed at the understanding of the condensation by-products role in wet peroxide oxidation processes. This study has been carried out in absence of catalyst to isolate the (positive or negative) effect of the condensation by-products on the kinetics of the process, and in presence of oxygen, to enhance the oxidation performance. This process was denoted as oxygen-assisted wet peroxide oxidation (WPO-O2) and was applied to the treatment of phenol. First, the influence of the reaction operating conditions (i.e., temperature, pH0, initial phenol concentration, H2O2 dose and O2 pressure) was evaluated. The initial phenol concentration and, overall, the H2O2 dose, were identified as the most critical variables for the formation of condensation by-products and thus, for the oxidation performance. Afterwards, a flow reactor packed with inert quartz beads was used to facilitate the deposition of such species and thus, to evaluate their impact on the kinetics of the process. It was found that as the quartz beads were covered by condensation by-products along reaction, the disappearance rates of phenol, total organic carbon (TOC) and H2O2 were increased. Consequently, an autocatalytic kinetic model, accounting for the catalytic role of the condensation by products, provides a well description of wet peroxide oxidation performance.
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17
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Condensation By-Products in Wet Peroxide Oxidation: Fouling or Catalytic Promotion? Part II: Activity, Nature and Stability. Catalysts 2019. [DOI: 10.3390/catal9060518] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The deposition of condensation by-products onto the catalyst surface upon wet peroxide and wet air oxidation processes has usually been associated with catalyst deactivation. However, in Part I of this paper, it was demonstrated that these carbonaceous deposits actually act as catalytic promoters in the oxygen-assisted wet peroxide oxidation (WPO-O2) of phenol. Herein, the intrinsic activity, nature and stability of these species have been investigated. To achieve this goal, an up-flow fixed bed reactor packed with porous Al2O3 spheres was used to facilitate the deposition of the condensation by-products formed in the liquid phase. It was demonstrated that the condensation by-products catalyzed the decomposition of H2O2 and a higher amount of these species leads to a higher degree of oxidation degree The reaction rates, conversion values and intermediates’ distribution were analyzed. The characterization of the carbonaceous deposits on the Al2O3 spheres showed a significant amount of condensation by-products (~6 wt.%) after 650 h of time on stream. They are of aromatic nature and present oxygen functional groups consisting of quinones, phenols, aldehydes, carboxylics and ketones. The initial phenol concentration and H2O2 dose were found to be crucial variables for the generation and consumption of such species, respectively.
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18
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Ruelas-Leyva JP, Mata-Martinez A, Talavera-López A, Gómez SA, Jimenez-Lam SA, Fuentes GA. Dehydrogenation of Propane to Propylene with Highly Stable Catalysts of Pt-Sn Supported Over Mesoporous Silica KIT-6. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2018. [DOI: 10.1515/ijcre-2017-0247] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
During several reactions, similar to dehydrogenation of propane to propylene, coke is one of the main reasons for the catalyst deactivation. The coke formation and further deactivation of the catalyst are strongly dependent to the active site in the catalyst and/or the properties of the support. KIT-6 with interconnected porous and high surface area can handle with the coke formation, and can disperse easily the deposited Pt nanoparticles. In this sense, a series of Pt-Sn/KIT-6 catalysts were synthesized with distinct Sn loadings and used in the dehydrogenation of propane. The performance of these catalysts during reaction varied with the Sn loading. The specific activities for propylene formation obtained with the catalysts were comparable to the best result reported in the literature. The nanoparticles present in the catalyst through pretreatment and reaction condition was the Pt-Sn alloy (1:1 atomic ratio), and that alloy is suggested to be the active phase. This Pt-Sn alloy was stable during the entire reaction time, that even in two catalysts containing a considerable amount of coke, deactivation was not observed. Also, the support (KIT-6) with high connectivity helped to avoid deactivation by coke.
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19
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Chen B, Zhang X, Chen W, Wang D, Song N, Qian G, Duan X, Yang J, Chen D, Yuan W, Zhou X. Tailoring of Fe/MnK-CNTs Composite Catalysts for the Fischer–Tropsch Synthesis of Lower Olefins from Syngas. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b01795] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bingxu Chen
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
- Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim 7491, Norway
| | - Xinxin Zhang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Wenyao Chen
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Di Wang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Nan Song
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Gang Qian
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Xuezhi Duan
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Jia Yang
- Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim 7491, Norway
| | - De Chen
- Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim 7491, Norway
| | - Weikang Yuan
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Xinggui Zhou
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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20
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Kosinov N, Liu C, Hensen EJM, Pidko EA. Engineering of Transition Metal Catalysts Confined in Zeolites. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2018; 30:3177-3198. [PMID: 29861546 PMCID: PMC5973782 DOI: 10.1021/acs.chemmater.8b01311] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 04/26/2018] [Indexed: 05/09/2023]
Abstract
Transition metal-zeolite composites are versatile catalytic materials for a wide range of industrial and lab-scale processes. Significant advances in fabrication and characterization of well-defined metal centers confined in zeolite matrixes have greatly expanded the library of available materials and, accordingly, their catalytic utility. In this review, we summarize recent developments in the field from the perspective of materials chemistry, focusing on synthesis, postsynthesis modification, (operando) spectroscopy characterization, and computational modeling of transition metal-zeolite catalysts.
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Affiliation(s)
- Nikolay Kosinov
- Inorganic
Systems Engineering Group, Department of Chemical Engineering, Faculty
of Applied Sciences, Delft University of
Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
- E-mail: (N.K.)
| | - Chong Liu
- Inorganic
Systems Engineering Group, Department of Chemical Engineering, Faculty
of Applied Sciences, Delft University of
Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Emiel J. M. Hensen
- Schuit
Institute of Catalysis, Laboratory of Inorganic Materials Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- E-mail: (E.J.M.H.)
| | - Evgeny A. Pidko
- Inorganic
Systems Engineering Group, Department of Chemical Engineering, Faculty
of Applied Sciences, Delft University of
Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
- TheoMAT
group, ITMO University, Lomonosova str. 9, St. Petersburg 191002, Russia
- E-mail: (E.A.P.)
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21
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Farahani MD, Dasireddy VDBC, Friedrich HB. Oxidative Dehydrogenation of n
-Octane over Niobium-Doped NiAl2
O4
: An Example of Beneficial Coking in Catalysis over Spinel. ChemCatChem 2018. [DOI: 10.1002/cctc.201701940] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Majid D. Farahani
- School of Chemistry and Physics; University of KwaZulu-Natal; Durban 4000 South Africa
| | | | - Holger B. Friedrich
- School of Chemistry and Physics; University of KwaZulu-Natal; Durban 4000 South Africa
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22
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23
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Xiao Y, Varma A. Highly Selective Nonoxidative Coupling of Methane over Pt-Bi Bimetallic Catalysts. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00156] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yang Xiao
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907-2100, United States
| | - Arvind Varma
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907-2100, United States
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24
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Kosinov N, Wijpkema ASG, Uslamin E, Rohling R, Coumans FJAG, Mezari B, Parastaev A, Poryvaev AS, Fedin MV, Pidko EA, Hensen EJM. Confined Carbon Mediating Dehydroaromatization of Methane over Mo/ZSM-5. Angew Chem Int Ed Engl 2018; 57:1016-1020. [PMID: 29181863 PMCID: PMC5820752 DOI: 10.1002/anie.201711098] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Revised: 11/25/2017] [Indexed: 11/10/2022]
Abstract
Non-oxidative dehydroaromatization of methane (MDA) is a promising catalytic process for direct valorization of natural gas to liquid hydrocarbons. The application of this reaction in practical technology is hindered by a lack of understanding about the mechanism and nature of the active sites in benchmark zeolite-based Mo/ZSM-5 catalysts, which precludes the solution of problems such as rapid catalyst deactivation. By applying spectroscopy and microscopy, it is shown that the active centers in Mo/ZSM-5 are partially reduced single-atom Mo sites stabilized by the zeolite framework. By combining a pulse reaction technique with isotope labeling of methane, MDA is shown to be governed by a hydrocarbon pool mechanism in which benzene is derived from secondary reactions of confined polyaromatic carbon species with the initial products of methane activation.
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Affiliation(s)
- Nikolay Kosinov
- Laboratory of Inorganic Materials ChemistryEindhoven University of TechnologyPO Box 513, 5600MBEindhovenThe Netherlands
| | - Alexandra S. G. Wijpkema
- Laboratory of Inorganic Materials ChemistryEindhoven University of TechnologyPO Box 513, 5600MBEindhovenThe Netherlands
| | - Evgeny Uslamin
- Laboratory of Inorganic Materials ChemistryEindhoven University of TechnologyPO Box 513, 5600MBEindhovenThe Netherlands
| | - Roderigh Rohling
- Laboratory of Inorganic Materials ChemistryEindhoven University of TechnologyPO Box 513, 5600MBEindhovenThe Netherlands
| | - Ferdy J. A. G. Coumans
- Laboratory of Inorganic Materials ChemistryEindhoven University of TechnologyPO Box 513, 5600MBEindhovenThe Netherlands
| | - Brahim Mezari
- Laboratory of Inorganic Materials ChemistryEindhoven University of TechnologyPO Box 513, 5600MBEindhovenThe Netherlands
| | - Alexander Parastaev
- Laboratory of Inorganic Materials ChemistryEindhoven University of TechnologyPO Box 513, 5600MBEindhovenThe Netherlands
| | - Artem S. Poryvaev
- International Tomography Center SB RAS andNovosibirsk State UniversityNovosibirsk630090Russia
| | - Matvey V. Fedin
- International Tomography Center SB RAS andNovosibirsk State UniversityNovosibirsk630090Russia
| | - Evgeny A. Pidko
- Laboratory of Inorganic Materials ChemistryEindhoven University of TechnologyPO Box 513, 5600MBEindhovenThe Netherlands
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials ChemistryEindhoven University of TechnologyPO Box 513, 5600MBEindhovenThe Netherlands
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25
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Xu Y, Jia X, Liu X. Supported Fe/MnOx catalyst with Ag doping for remarkably enhanced catalytic activity in Fischer–Tropsch synthesis. Catal Sci Technol 2018. [DOI: 10.1039/c7cy02643a] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The role of Ag in the promotion of the FTS performance and the evolutions of structure and phase over the Fe/MnOx catalyst has been clearly elucidated.
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Affiliation(s)
- Yuebing Xu
- Department of Chemical Engineering
- School of Chemical and Material Engineering
- Jiangnan University
- 214122 Wuxi
- China
| | - Xinli Jia
- Department of Chemical Engineering
- School of Chemical and Material Engineering
- Jiangnan University
- 214122 Wuxi
- China
| | - Xiaohao Liu
- Department of Chemical Engineering
- School of Chemical and Material Engineering
- Jiangnan University
- 214122 Wuxi
- China
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26
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Kosinov N, Wijpkema ASG, Uslamin E, Rohling R, Coumans FJAG, Mezari B, Parastaev A, Poryvaev AS, Fedin MV, Pidko EA, Hensen EJM. Confined Carbon Mediating Dehydroaromatization of Methane over Mo/ZSM-5. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201711098] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Nikolay Kosinov
- Laboratory of Inorganic Materials Chemistry; Eindhoven University of Technology; PO Box 513, 5600 MB Eindhoven The Netherlands
| | - Alexandra S. G. Wijpkema
- Laboratory of Inorganic Materials Chemistry; Eindhoven University of Technology; PO Box 513, 5600 MB Eindhoven The Netherlands
| | - Evgeny Uslamin
- Laboratory of Inorganic Materials Chemistry; Eindhoven University of Technology; PO Box 513, 5600 MB Eindhoven The Netherlands
| | - Roderigh Rohling
- Laboratory of Inorganic Materials Chemistry; Eindhoven University of Technology; PO Box 513, 5600 MB Eindhoven The Netherlands
| | - Ferdy J. A. G. Coumans
- Laboratory of Inorganic Materials Chemistry; Eindhoven University of Technology; PO Box 513, 5600 MB Eindhoven The Netherlands
| | - Brahim Mezari
- Laboratory of Inorganic Materials Chemistry; Eindhoven University of Technology; PO Box 513, 5600 MB Eindhoven The Netherlands
| | - Alexander Parastaev
- Laboratory of Inorganic Materials Chemistry; Eindhoven University of Technology; PO Box 513, 5600 MB Eindhoven The Netherlands
| | - Artem S. Poryvaev
- International Tomography Center SB RAS and; Novosibirsk State University; Novosibirsk 630090 Russia
| | - Matvey V. Fedin
- International Tomography Center SB RAS and; Novosibirsk State University; Novosibirsk 630090 Russia
| | - Evgeny A. Pidko
- Laboratory of Inorganic Materials Chemistry; Eindhoven University of Technology; PO Box 513, 5600 MB Eindhoven The Netherlands
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials Chemistry; Eindhoven University of Technology; PO Box 513, 5600 MB Eindhoven The Netherlands
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27
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Understanding the mechanism of catalytic fast pyrolysis by unveiling reactive intermediates in heterogeneous catalysis. Nat Commun 2017; 8:15946. [PMID: 28660882 PMCID: PMC5493764 DOI: 10.1038/ncomms15946] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 05/08/2017] [Indexed: 12/27/2022] Open
Abstract
Catalytic fast pyrolysis is a promising way to convert lignin into fine chemicals and fuels, but current approaches lack selectivity and yield unsatisfactory conversion. Understanding the pyrolysis reaction mechanism at the molecular level may help to make this sustainable process more economic. Reactive intermediates are responsible for product branching and hold the key to unveiling these mechanisms, but are notoriously difficult to detect isomer-selectively. Here, we investigate the catalytic pyrolysis of guaiacol, a lignin model compound, using photoelectron photoion coincidence spectroscopy with synchrotron radiation, which allows for isomer-selective detection of reactive intermediates. In combination with ambient pressure pyrolysis, we identify fulvenone as the central reactive intermediate, generated by catalytic demethylation to catechol and subsequent dehydration. The fulvenone ketene is responsible for the phenol formation. This technique may open unique opportunities for isomer-resolved probing in catalysis, and holds the potential for achieving a mechanistic understanding of complex, real-life catalytic processes. The conversion of lignin by catalytic fast pyrolysis into useful fine chemicals is a promising route to fuel production, however selectivity and conversion are still not optimal. Here, the authors investigate the reaction mechanism by detection of reactive intermediates responsible for the formation of key products.
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28
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Chen S, Meng L, Chen B, Chen W, Duan X, Huang X, Zhang B, Fu H, Wan Y. Poison Tolerance to the Selective Hydrogenation of Cinnamaldehyde in Water over an Ordered Mesoporous Carbonaceous Composite Supported Pd Catalyst. ACS Catal 2017. [DOI: 10.1021/acscatal.6b02720] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Shangjun Chen
- Key
Laboratory of Resource Chemistry of Ministry of Education, Shanghai
Key Laboratory of Rare Earth Functional Materials, and Department
of Chemistry, Shanghai Normal University, Shanghai 200234, People’s Republic of China
| | - Li Meng
- Key
Laboratory of Resource Chemistry of Ministry of Education, Shanghai
Key Laboratory of Rare Earth Functional Materials, and Department
of Chemistry, Shanghai Normal University, Shanghai 200234, People’s Republic of China
| | - Bingxu Chen
- State
Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People’s Republic of China
| | - Wenyao Chen
- State
Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People’s Republic of China
| | - Xuezhi Duan
- State
Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People’s Republic of China
| | - Xing Huang
- Department
of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4−6, 14195 Berlin, Germany
| | - Bingsen Zhang
- Shenyang
National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
| | - Haibin Fu
- Key
Laboratory of Resource Chemistry of Ministry of Education, Shanghai
Key Laboratory of Rare Earth Functional Materials, and Department
of Chemistry, Shanghai Normal University, Shanghai 200234, People’s Republic of China
| | - Ying Wan
- Key
Laboratory of Resource Chemistry of Ministry of Education, Shanghai
Key Laboratory of Rare Earth Functional Materials, and Department
of Chemistry, Shanghai Normal University, Shanghai 200234, People’s Republic of China
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29
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Jiang F, Zhang M, Liu B, Xu Y, Liu X. Insights into the influence of support and potassium or sulfur promoter on iron-based Fischer–Tropsch synthesis: understanding the control of catalytic activity, selectivity to lower olefins, and catalyst deactivation. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00048k] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A desired selectivity to lower olefins has been achieved by combination of K and S promoters.
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Affiliation(s)
- Feng Jiang
- Department of Chemical Engineering
- School of Chemical and Material Engineering
- Jiangnan University
- 214122 Wuxi
- China
| | - Min Zhang
- Department of Chemical Engineering
- School of Chemical and Material Engineering
- Jiangnan University
- 214122 Wuxi
- China
| | - Bing Liu
- Department of Chemical Engineering
- School of Chemical and Material Engineering
- Jiangnan University
- 214122 Wuxi
- China
| | - Yuebing Xu
- Department of Chemical Engineering
- School of Chemical and Material Engineering
- Jiangnan University
- 214122 Wuxi
- China
| | - Xiaohao Liu
- Department of Chemical Engineering
- School of Chemical and Material Engineering
- Jiangnan University
- 214122 Wuxi
- China
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30
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Dasireddy VDBC, Huš M, Likozar B. Effect of O2, CO2 and N2O on Ni–Mo/Al2O3 catalyst oxygen mobility in n-butane activation and conversion to 1,3-butadiene. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01033h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A commercial heterogeneous Ni–Mo/Al2O3 catalyst was tested for the oxidative dehydrogenation (ODH) reaction of n-butane with different oxidant species: O2, CO2 and N2O.
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Affiliation(s)
- Venkata D. B. C. Dasireddy
- Department of Catalysis and Chemical Reaction Engineering
- National Institute of Chemistry
- Ljubljana
- Slovenia
| | - Matej Huš
- Department of Catalysis and Chemical Reaction Engineering
- National Institute of Chemistry
- Ljubljana
- Slovenia
| | - Blaž Likozar
- Department of Catalysis and Chemical Reaction Engineering
- National Institute of Chemistry
- Ljubljana
- Slovenia
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31
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Application of Inelastic Neutron Scattering to the Methanol-to-Gasoline Reaction Over a ZSM-5 Catalyst. Catal Letters 2016; 146:1242-1248. [PMID: 32355437 PMCID: PMC7175671 DOI: 10.1007/s10562-016-1742-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 03/29/2016] [Indexed: 11/25/2022]
Abstract
Abstract Inelastic neutron scattering (INS) is used to investigate a ZSM-5 catalyst that has been exposed to methanol vapour at elevated temperature. In-line mass spectrometric analysis of the catalyst exit stream confirms methanol-to-gasoline chemistry, whilst ex situ INS measurements detect hydrocarbon species formed in/on the catalyst during methanol conversion. These preliminary studies demonstrate the capability of INS to complement infrared spectroscopic characterisation of the hydrocarbon pool present in/on ZSM-5 during the MTG reaction. Graphical Abstract ![]()
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