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Modeling the simultaneous oxidation of CO and H2 on Pt – Promoting effect of H2 on the CO-light-off

Paper ID Volume ID Publish Year Pages File Format Full-Text
41719 45897 2011 9 PDF Available
Title
Modeling the simultaneous oxidation of CO and H2 on Pt – Promoting effect of H2 on the CO-light-off
Abstract

A microkinetic model is developed to simulate the promoting effect of H2 on the light-off of CO oxidation on platinum. It is shown that the coupling of the CO and the H2 oxidation sub-mechanisms, via the hydroxyl intermediate and its reaction with CO to carboxyl, is crucial to describe the process. This carboxyl-path was not considered in previous modeling studies.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (125 K)Download as PowerPoint slideHighlights► Microkinetic model to simulate the promoting effect of H2 on the CO oxidation on Pt. ► Coupling of the CO and the H2 oxidation sub-mechanisms. ► Carboxyl path is crucial to describe the process. ► Estimated parameters are in accordance with experimental values. ► Developed mechanism is thermodynamically consistent.

Keywords
CO oxidation; H2 oxidation; Promotion; Pt; Microkinetic model; Light-off; Carboxyl-path
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Modeling the simultaneous oxidation of CO and H2 on Pt – Promoting effect of H2 on the CO-light-off
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 397, Issues 1–2, 30 April 2011, Pages 174–182
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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