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Kinetics and Mechanism of the Water–Gas Shift Reaction Over Platinum Supported Catalysts |
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| Authors: | Olivier Thinon Karim Rachedi Fabrice Diehl Priscilla Avenier Yves Schuurman |
| Affiliation: | 1. Institut de Recherches sur la Catalyse et l’Environnement de Lyon, UMR 5256 CNRS-Université de Lyon 1, 2 Avenue Albert Einstein, 69626, Villeurbanne Cedex, France 2. IFP-Lyon, Autoroute A7 rond point de l’échangeur de Solaize, 69360, Solaize, France |
| Abstract: | 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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