Photoassisted heterogeneous catalysis: Rate equations for oxidation of 2-methyl-2-butyl-alcohol and isobutane

Rate equations are presented for the photoassisted catalytic oxidation to acetone of 2-methyl-2-butyl-alcohol and isobutane over titanium dioxide catalysts. The alcohol oxidation rate can be described by an expression reflecting a single rate-determining step: the two-site dehydration of adsorbed al...

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Bibliographic Details
Published in:Journal of catalysis 1981, Vol.67 (1), p.35-48
Main Authors: Childs, Lorette Pruden, Ollis, David F.
Format: Article
Language:English
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Summary:Rate equations are presented for the photoassisted catalytic oxidation to acetone of 2-methyl-2-butyl-alcohol and isobutane over titanium dioxide catalysts. The alcohol oxidation rate can be described by an expression reflecting a single rate-determining step: the two-site dehydration of adsorbed alcohol. The rate of isobutane oxidation is presumed to be controlled by two surface steps in series: (i) formation of and (ii) subsequent dehydration of an alcohol intermediate. The rate equation derived from these assumptions represents the data satisfactorily when all sites are taken as identical. These model results indicate that dissociated oxygen participates in the photocatalytic alkane oxidation.
ISSN:0021-9517
1090-2694
DOI:10.1016/0021-9517(81)90259-1