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Sharma V, Agrawal A, Singh O, Goyal R, Sarkar B, Gopinathan N, Gumfekar SP. A Comprehensive Review on the Synthesis Techniques of Porous Materials for Gas Separation and Catalysis. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24507] [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)
- Vikrant Sharma
- Department of Chemical Engineering Indian Institute of Technology Ropar India
| | - Ankit Agrawal
- CSIR‐Indian Institute of Petroleum Dehradun India
- Academy of Scientific and Innovative Research (AcSIR), Gaziabad India
| | - Omvir Singh
- CSIR‐Indian Institute of Petroleum Dehradun India
- Academy of Scientific and Innovative Research (AcSIR), Gaziabad India
| | - Reena Goyal
- CSIR‐Indian Institute of Petroleum Dehradun India
- Department of Chemical Engineering Indian Institute of Technology Roorkee India
| | - Bipul Sarkar
- CSIR‐Indian Institute of Petroleum Dehradun India
| | - Navin Gopinathan
- Department of Chemical Engineering Indian Institute of Technology Ropar India
| | - Sarang P. Gumfekar
- Department of Chemical Engineering Indian Institute of Technology Ropar India
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Recent Advances in the Mitigation of the Catalyst Deactivation of CO2 Hydrogenation to Light Olefins. Catalysts 2021. [DOI: 10.3390/catal11121447] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The catalytic conversion of CO2 to value-added chemicals and fuels has been long regarded as a promising approach to the mitigation of CO2 emissions if green hydrogen is used. Light olefins, particularly ethylene and propylene, as building blocks for polymers and plastics, are currently produced primarily from CO2-generating fossil resources. The identification of highly efficient catalysts with selective pathways for light olefin production from CO2 is a high-reward goal, but it has serious technical challenges, such as low selectivity and catalyst deactivation. In this review, we first provide a brief summary of the two dominant reaction pathways (CO2-Fischer-Tropsch and MeOH-mediated pathways), mechanistic insights, and catalytic materials for CO2 hydrogenation to light olefins. Then, we list the main deactivation mechanisms caused by carbon deposition, water formation, phase transformation and metal sintering/agglomeration. Finally, we detail the recent progress on catalyst development for enhanced olefin yields and catalyst stability by the following catalyst functionalities: (1) the promoter effect, (2) the support effect, (3) the bifunctional composite catalyst effect, and (4) the structure effect. The main focus of this review is to provide a useful resource for researchers to correlate catalyst deactivation and the recent research effort on catalyst development for enhanced olefin yields and catalyst stability.
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Low-Temperature Hydrogenation of Toluene Using an Iron-Promoted Molybdenum Carbide Catalyst. Catalysts 2021. [DOI: 10.3390/catal11091079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
As an alternative to noble metal hydrogenation catalysts, pure molybdenum carbide displays unsatisfactory catalytic activity for arene hydrogenation. Precious metals such as palladium, platinum, and gold are widely used as additives to enhance the catalytic activities of molybdenum carbide, which severely limits its potential applications in industry. In this paper, iron-promoted molybdenum carbide was prepared and characterized by various techniques, including in situ XRD, synchrotron-based XPS and TEM. while the influence of Fe addition on catalytic performance for toluene hydrogenation was also studied. The experimental data disclose that a small amount of Fe doping strongly enhances catalytic stability in toluene hydrogenation, but the catalytic performance drops rapidly with higher loading amounts of Fe.
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