β Scribed by Olivier Thinon; Fabrice Diehl; Priscilla Avenier; Yves Schuurman
No coin nor oath required. For personal study only.
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/CeO 2 /Al 2 O 3 and Pt/TiO 2 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.
π SIMILAR VOLUMES
Abstrart-A procedure has been developed for a priori prediction of intraparticle diffusion effects in low temperature water-gas shift reaction. Use is made of transport characteristics of the Cu/ZnO/Al,O, pelleted catalyst determined independently by combination of diffusion and permeation results o