Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 6, Issue 8, Pages 2633-2646Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cy01942g
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Funding
- Spanish Ministry of Economy and Competitiveness (MINECO)
- FEDER [CTQ2012-36408]
- Smart Mix Program of the Netherlands Ministry of Economic Affairs
- Netherlands Ministry of Education, Culture and Science
- Spanish Ministry of Economy and Competitiveness (MINECO) [EEBB-I-14-08633]
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Mesoporous H-ZSM-5-carbon composites, prepared via tetrapropylammonium hydroxide (TPAOH) post treatment of H-ZSM-5 followed by deposition of pyrolytic carbon, have been used as the support for the preparation of Co-based Fischer-Tropsch catalysts. The resulting catalysts display an improved performance during Fischer-Tropsch synthesis (FTS), with higher activity, higher selectivity towards C5-C9 (gasoline range) hydrocarbons and lower selectivity towards C1 (and C2) than Co/mesoH-ZSM5 (without pyrolytic carbon). This is due to the weaker metal-support interaction caused by the deposited carbon (as revealed by XPS) leading to a higher reducibility of the Co species. Further, the partial deactivation of the Bronsted acid sites by pyrolytic carbon deposition, as was observed by NH3-TPD, allows the modification of the zeolite acidity. Both the olefin to paraffin (O/P) and the isoparaffin to normal paraffin (I/N) ratios decrease with the increase in the carbon content, opening the door to further tune the catalytic performance in multifunctional FTS operations.
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