Carbon/H-ZSM-5 composites as supports for bi-functional Fischer-Tropsch synthesis catalysts

Carbon/H-ZSM-5 composites as supports for bi-functional Fischer-Tropsch synthesis catalysts

Valero Romero, M.J. (Universidad de Málaga)
Sartipi, S. (TU Delft ChemE/Catalysis Engineering)
Sun, X (TU Delft ChemE/Catalysis Engineering)
Rodríguez-Mirasol, J. (Universidad de Málaga)
Cordero, T. (Universidad de Málaga)
Kapteijn, F. (TU Delft ChemE/Catalysis Engineering)
Gascon, Jorge (TU Delft ChemE/Catalysis Engineering)

2016-04-21

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 Brønsted 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.

http://resolver.tudelft.nl/uuid:aed4c51f-12a8-45a8-a5ae-3561bf020907

https://doi.org/10.1039/c5cy01942g

2044-4753

Catalysis Science & Technology, 6 (8), 2633-2646

Institutional Repository

journal article

© 2016 M.J. Valero Romero, S. Sartipi, X Sun, J. Rodríguez-Mirasol, T. Cordero, F. Kapteijn, Jorge Gascon