Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 284, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119787
Keywords
CO2 hydrogenation; Fischer-Tropsch synthesis; ZSM-5; XAFS; Cobalt
Funding
- University of Rochester start-up funds
- DOE Office of Science by Brookhaven National Laboratory [DE-SC0012704]
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Research on utilizing CO2 as a C-1 feedstock for the synthesis of chemicals and fuels shows that the selectivity of catalysts is strongly linked to the Si/Al ratio and the method of introducing the K promoter.
The utilization of CO2 as a C-1 feedstock for synthesis of value-added chemicals and fuels could both mitigate the negative effects associated with increasing CO2 emissions and decrease dependence on fossil fuels as part of a future circular carbon economy. Co-based catalysts have been well-developed for Fischer-Tropsch synthesis (FTS), but replacing the CO reactant with CO2 (CO2-FTS) typically results in low selectivity toward desirable light olefins. To better understand the structure-property relationships of Co-based catalysts, and extend promising FTS results to CO2-FTS, we have studied the effect of a potassium promoter and acidic properties of ZSM-5 on catalytic performance. The selectivity of FTS and CO2-FTS is shown to be a strong function of Si/Al ratio in co-impregnated catalysts, with findings supported by in situ XAFS and FTIR, demonstrating light olefin selectivity can be tuned by Si/Al ratio and the method of introducing the K promoter.
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