Effect of single-file diffusion on the hydroisomerization of 2,2-dimethylbutane on platinum loaded H-mordenite.

F.J.M.M. Gauw, de, J. Grondelle, van, R.A. Santen, van

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Abstract

The effect of single-file diffusion limitation on the rate of an irreversible first order catalytic reaction was studied both theor. and exptl. A rate equation was derived using a relation between the effective diffusion const. and the concn. of adsorbed mols. under single-file conditions which is valid on the time scale of catalytic reactions. According to this equation there is a max. in the reaction rate as a function of the reactant concn. The hydroisomerization of 2,2-dimethylbutane on platinum loaded large crystallites of H-Mordenite was used as a test reaction to verify the theor. results. The predicted behavior was indeed confirmed exptl. By measuring the rate const. of 2,2-dimethylbutane hydroisomerization on a sample for which the reaction was kinetically controlled and by comparing the activities of the two samples, the effective diffusion const. was detd. at 270 ¿C, resulting in a value of 1.3¿10-12 m2/s. A value of 6.5¿10-8 m2/s was calcd. for the self-diffusion const.
Original languageEnglish
Title of host publicationZeolites and Mesoporous Materials at the Dawn of the 21st Century
EditorsA. Galarneau
Place of PublicationAmsterdam
PublisherElsevier
Pages4524-4532
ISBN (Print)0-444-50238-6
DOIs
Publication statusPublished - 2001
Eventconference; 13th International Zeolite Conference, Montpellier, France, 8 - 13 July 2001; 2001-07-08; 2001-07-13 -
Duration: 8 Jul 200113 Jul 2001

Publication series

NameStudies in Surface Science and Catalysis
Volume135
ISSN (Print)0167-2991

Conference

Conferenceconference; 13th International Zeolite Conference, Montpellier, France, 8 - 13 July 2001; 2001-07-08; 2001-07-13
Period8/07/0113/07/01
Other13th International Zeolite Conference, Montpellier, France, 8 - 13 July 2001

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