Screening of bifunctional water-gas shift catalysts

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• 作者：Olivier Thinon ; Fabrice Diehl ; Priscilla Avenier ; Yves Schuurman
• 关键词：WGS ; Oxides ; Methanation ; Parallel reactor ; Hydrogen purification
• 刊名：Catalysis Today
• 出版年：2008
• 出版时间：30 August 2008
• 年：2008
• 卷：137
• 期：1
• 页码：29-35
• 全文大小：662 K

文摘

A large number of different formulations have been recently proposed in the literature as new catalysts for the water-gas shift (WGS) reaction. These formulations typically consist of a metal deposited on a reducible support. As these catalysts have been synthesized and tested by different groups in different operating conditions, a true comparison of their activities is not really possible. The aim of this study is to screen these samples under identical conditions using a model reformate as reaction mixture. A commercial parallel reactor has been used for this task. Comparison of the data obtained for the Pt catalysts from the parallel reactor with those obtained from a single fixed bed reactor showed deviations of 20–30 % in the kinetic parameters. Rh and Ru based catalysts produced significant amounts of methane. Pt/CeO₂/Al₂O₃ and Pt/TiO₂ were found to be the most active catalysts for the high temperature water-gas shift while gold and copper catalysts showed promising results for low temperature applications, but they require testing at lower CO partial pressures.