EFFECT OF PREPARATION CONDITIONS ON THE CATALYTIC PERFORMANCE OF COPPER MANGANESE OXIDE CATALYSTS FOR CO OXIDATION

Copper manganese oxides are prepared using a coprecipitation procedure and studied for the oxidation of CO at ambient temperature. In partic ular, the effect of a range of preparation variables are investigated in detail. The variables investigated include the precipitate ageing t ime, pH and temperature of precipitation: the [Cu]/[Mn] ratio of the p recipitation solution and the catalyst calcination temperature. The op timum preparation conditions are identified with respect to the cataly st activity for the oxidation of CO at ambient temperature. The result s are interpreted in terms of the structure of the active catalyst. Ge nerally it has been concluded that catalysts containing copper/mangane se mixed phases are found to be the most active. (C) 1998 Elsevier Sci ence B.V.