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The promotion of carbon monoxide oxidation by hydrogen on supported platinum catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
43150 45957 2009 8 PDF Available
Title
The promotion of carbon monoxide oxidation by hydrogen on supported platinum catalyst
Abstract

This paper reports the results of a study of the combined oxidation of hydrogen and carbon monoxide on a platinum diesel oxidation catalyst. Experimental results for the light-off curves obtained in a monolith supported catalyst are shown for different concentrations. The presence of hydrogen is shown to promote the oxidation of CO, with the largest effect shown for the first small addition of hydrogen, then a progressively decreasing effect as the hydrogen concentration is increased. The enhancement effect can be successfully simulated using a kinetic model in which the activation energy for the desorption of CO is decreased as a function of hydrogen adsorption. Hydrogen is allowed to adsorb on sites only accessible to hydrogen and not CO or oxygen.

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Keywords
Platinum catalyst; Monolith; Carbon monoxide; Oxidation; Hydrogen promotion; Simulation
First Page Preview
The promotion of carbon monoxide oxidation by hydrogen on supported platinum catalyst
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 352, Issues 1–2, 15 January 2009, Pages 27–34
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis