New catalyst for selective oxidation of CO in excess H2 designing of the active catalyst having different optimum temperature

Highly active and highly selective new catalysts for the selective oxidation of CO in excess H-2 were prepared by depositing large amount of FeOx on 2 wt.% Pt/Al2O3, 1 wt.% Pt/CeO2, and 1 wt.% Pt/TiO2 catalysts (100 times in weight of the Pt). Optimum activity of the FeOx/Pt/Al2O3 and FeOx/Pt/CeO2 catalysts was attained at 130-140degreesC while that of the FeOx/Pt/TiO2 catalyst was at 70-100degreesC in the space velocity of 15,000 and 36,000 h(-1). CO conversion of the FeOx/Pt/TiO2 catalyst was ca. 70% at 40degreesC in a flow of 15,000 h(-1). Optimum temperature of the FeOx/Pt/Al2O3, FeOx/Pt/CeO2, and FeOx/Pt/TiO2 catalysts depends on the support oxides, and the feature of the new catalysts is different from that of such metallic catalyst as Pt/Al2O3, Pt/CeO2, and Pt/TiO2. (C) 2004 Elsevier B.V. All rights reserved.