TY - JOUR
T1 - Carbon/H-ZSM-5 composites as supports for bi-functional Fischer-Tropsch synthesis catalysts
AU - Valero-Romero, M. J.
AU - Sartipi, S.
AU - Sun, X.
AU - Rodríguez-Mirasol, J.
AU - Cordero, T.
AU - Kapteijn, F.
AU - Gascon, J.
N1 - Publisher Copyright:
© The Royal Society of Chemistry 2016.
PY - 2016/4/21
Y1 - 2016/4/21
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84966318549&partnerID=8YFLogxK
U2 - 10.1039/c5cy01942g
DO - 10.1039/c5cy01942g
M3 - Article
AN - SCOPUS:84966318549
SN - 2044-4753
VL - 6
SP - 2633
EP - 2646
JO - Catalysis Science and Technology
JF - Catalysis Science and Technology
IS - 8
ER -