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Ekici C, Ho CR, DeWilde JF, Biegler LT, Witt PM. Optimization Modeling for Advanced Syngas to Olefin Reactive Systems. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c03135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Can Ekici
- Carnegie Mellon University, Pittsburgh, Pennsylvania15213, United States
| | | | | | - Lorenz T. Biegler
- Carnegie Mellon University, Pittsburgh, Pennsylvania15213, United States
| | - Paul M. Witt
- The Dow Chemical Company, Midland, Michigan48667, United States
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Two-Step Conversion of CO2 to Light Olefins: Laboratory-Scale Demonstration and Scale-Up Considerations. CHEMENGINEERING 2022. [DOI: 10.3390/chemengineering6060096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The highly selective production of light olefins from CO2 was demonstrated for the first time with a laboratory-scale process comprising consecutive reverse water gas shift (RWGS) and Fischer–Tropsch (FT) reactors. The RWGS reaction, catalyzed by rhodium washcoated catalyst at 850 °C yielded good quality syngas with conversion values close to the thermodynamic equilibrium and without experiencing catalyst deactivation from carbon formation or sintering. For the FT synthesis, a packed bed Fe-Na-S/α-Al2O3 catalyst was used. The highest light olefin selectivity observed for the FT-synthesis was 52% at 310 °C, GHSV of 2250 h−1 and H2/CO ratio of 1. However, the optimal conditions for the light olefin production were determined to be at 340 °C, a GHSV of 3400 h−1 and a H2/CO ratio of 2, as the CO conversion was markedly higher, while the light olefin selectivity remained at a suitably high level. In addition to the experimental results, considerations for the further optimization and development of the system are presented. The combined RWGS–FT process seems to work reasonably well, and initial data for basic process design and modeling were produced.
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Shi Z, Bhan A. Methanol-to-olefins catalysis on window-cage type zeolites/zeotypes with syngas co-feeds: Understanding syngas-to-olefins chemistry. J Catal 2022. [DOI: 10.1016/j.jcat.2022.07.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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NON-UNIFORM CATALYST DISTRIBUTION IN FIXED-BED REACTORS To Improve DEHYDROGENATION PROCESSES. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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