Kinetics and Mechanism of the Water–Gas Shift Reaction Over Platinum Supported Catalysts

被引：0
|
作者：
Olivier Thinon
Karim Rachedi
Fabrice Diehl
Priscilla Avenier
Yves Schuurman
机构：
[1] UMR 5256 CNRS-Université de Lyon 1,Institut de Recherches sur la Catalyse et l’Environnement de Lyon
[2] IFP-Lyon,undefined
来源：
Topics in Catalysis | 2009年 / 52卷
关键词：
WGS; Temperature-programmed desorption; Dual-site; CeO; TiO; Water adsorption;
D O I：
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学科分类号：
摘要：
A dual-site reaction mechanism is proposed for Pt based water–gas shift catalysts. The sorption equilibrium parameters are evaluated in detail to validate their physical significance. The values of the van ‘t Hoff parameters for CO and H2 correspond to those for chemisorption on platinum. The sorption parameters of H2O and CO2 on the supports have been quantitatively determined from temperature-programmed desorption experiments and have been compared to the values obtained from the kinetic study. Finally the proposed model is able to explain the different activities between the two catalysts.
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