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Mente P, Mashindi V, Magubane A, Phaahlamohlaka TN, Gangatharan PM, Forbes RP, Coville NJ. Vapour phase hydrogenation of cinnamaldehyde using cobalt supported inside and outside hollow carbon spheres. CAN J CHEM 2022. [DOI: 10.1139/cjc-2021-0097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The hydrogenation of cinnamaldehyde is usually performed in the liquid phase in batch mode. In this study, a vapour phase flow system has been used to evaluate the use of cobalt catalysts supported inside and outside hollow carbon spheres (HCSs). The influence of temperature, hydrogen flow rate, and catalyst mass on the hydrogenation reaction was investigated. The catalysts generally showed modest conversion to the required products, hydrocinnamaldehyde, 3-phenyl propanol, cinnamyl alcohol, together with formation of various decomposition products. The data revealed that the Co@HCS showed better conversion and product selectivity compared with the Co/HCS. The catalysts with smaller particle sizes (ca. 6 nm) were more efficient than those with larger particles (30–40 nm). An increase in reaction temperature (200–300 °C) resulted in a lower cinnamaldehyde conversion and a poor product selectivity. TPR studies revealed that the Co@HCSs had a stronger metal-support interaction than the Co/HCSs catalysts. Catalyst recycling studies revealed that only the Co/HCSs could be regenerated (four cycles) and post reaction analysis of the catalysts revealed that this was due to HCS pore blockage and not Co sintering.
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Affiliation(s)
- Pumza Mente
- DSI-NRF Centre of Excellence in Strong Materials, Johannesburg 2000, South Africa
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Victor Mashindi
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Alice Magubane
- DSI-NRF Centre of Excellence in Strong Materials, Johannesburg 2000, South Africa
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Tumelo N. Phaahlamohlaka
- DSI-NRF Centre of Excellence in Catalysis, Pretoria 0001, South Africa
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Prakash M. Gangatharan
- DSI-NRF Centre of Excellence in Strong Materials, Johannesburg 2000, South Africa
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Roy P. Forbes
- DSI-NRF Centre of Excellence in Catalysis, Pretoria 0001, South Africa
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Neil J. Coville
- DSI-NRF Centre of Excellence in Strong Materials, Johannesburg 2000, South Africa
- DSI-NRF Centre of Excellence in Catalysis, Pretoria 0001, South Africa
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg 2050, South Africa
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Abstract
The term LOHC stands for Liquid Organic Hydrogen Carriers. The term has been so well accepted by the scientific community that the studies published before the existence of this name are not very visible. In this mini-review, we have tried to rehabilitate various studies that deserve to be put back in the spotlight in the present context. Studies indeed began in the early 1980s and many publications have compared the use of various organic carriers, various catalysts and reactors. Recent reviews also include the economic aspects of this concept.
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Yang J, Fan Y, Li ZL, Peng Z, Yang JH, Liu B, Liu Z. Bimetallic Pd-M (M = Pt, Ni, Cu, Co) nanoparticles catalysts with strong electrostatic metal-support interaction for hydrogenation of toluene and benzene. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110992] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Lozano L, Marin GB, Thybaut JW. Analytical Rate Expressions Accounting for the Elementary Steps in Benzene Hydrogenation on Pt. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b00742] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luis Lozano
- Laboratory for Chemical Technology, Ghent University, Technologiepark 914, Ghent B-9052, Belgium
| | - Guy B. Marin
- Laboratory for Chemical Technology, Ghent University, Technologiepark 914, Ghent B-9052, Belgium
| | - Joris W. Thybaut
- Laboratory for Chemical Technology, Ghent University, Technologiepark 914, Ghent B-9052, Belgium
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Chu H, Li N, Niu L, Liu C, Qiu M, Bai G. Continuous Hydrogenation of Toluene over Sr- and PEG800-Modified Ni/γ-Al2O3Catalysts. Chem Eng Technol 2015. [DOI: 10.1002/ceat.201400543] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Influence of N addition in mesoporous carbons used as supports of Pt, Pd and Ru for toluene hydrogenation and iron oxide for benzene oxidation. REACTION KINETICS MECHANISMS AND CATALYSIS 2015. [DOI: 10.1007/s11144-015-0843-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Effects of the activation method on the performance of base metal catalysts prepared by wet impregnation for toluene hydrogenation in liquid phase. REACTION KINETICS MECHANISMS AND CATALYSIS 2014. [DOI: 10.1007/s11144-014-0790-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Bera T, Thybaut JW, Marin GB. Single-Event MicroKinetics of Aromatics Hydrogenation on Pt/H-ZSM22. Ind Eng Chem Res 2011. [DOI: 10.1021/ie200541q] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tapan Bera
- Laboratory for Chemical Technology, Ghent University, Krijgslaan 281 − S5, B-9000 Ghent, Belgium
| | - Joris W. Thybaut
- Laboratory for Chemical Technology, Ghent University, Krijgslaan 281 − S5, B-9000 Ghent, Belgium
| | - Guy B. Marin
- Laboratory for Chemical Technology, Ghent University, Krijgslaan 281 − S5, B-9000 Ghent, Belgium
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