Title: Influence of the zeolite composition on the hydro-isomerisation and hydrocracking of alkanes on Pt/USY zeolites: modelling of the reaction kinetics using an adsorption-reaction approach
Authors: Denayer, JFM ×
Martens, Johan
Jacobs, Pierre
Thybaut, JW
Marin, GB
Baron, GV #
Issue Date: 2003
Series Title: Applied catalysis. A: General vol:246 issue:1 pages:17-28
Conference: date:Free Univ Brussels, B-1050 Brussels, Belgium; Katholieke Univ Leuven, Ctr Oppervlaktechem & Katalyse, B-3001 Louvain, Belgium; State Univ Ghent, Petrochem Tech Lab, B-9000 Ghent, Belgium
Abstract: The influence of the zeolite acidity on the kinetics of the hydro-isomerisation and hydrocracking of n-octane was studied using a refined lumped adsorption-reaction model. Catalytic experiments were performed with two Pt/USY catalysts with different composition at several temperatures and hydrogen to hydrocarbon ratios. Although pronounced differences in activity between both catalysts were observed, the selectivity for isomerisation and cracked product formation was identical. The catalytic. data were modelled using a reaction model which accounts for the different types of beta-scission. The physisorbed concentrations were related to the gas phase concentrations using independently determined adsorption parameters. Kinetic parameters and activation energies were obtained by fitting of the model equations to the experimental data. Use of the concept of standard alkene protonation enthalpy [J. Catal. 202 (2001) 324] allows to explain the activity/selectivity/acidity relationship. (C) 2002 Elsevier Science B.V. All rights reserved.
ISSN: 0926-860X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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