OXIDATION OF CARBON-MONOXIDE ON CU-CR-MN GAMMA-AL2O3 CATALYSTS FROM VARIOUS SOURCES/

X-ray diffraction analysis, electron diffuse-reflectance spectroscopy, and kinetic measurements, conducted in a gradientless reactor, were u sed to study the effect of the introduction of active ingredients on t he composition and performance of the Cu-Cr-Mn/gamma-Al2O3 catalyst fo r CO oxidation. It was found that for the preparation of a highly effi cient catalyst, it is important to eliminate possible contacts between manganese and chromium ions in the bulk of the catalyst grain; this c an be accomplished by using an appropriate order of the introduction o f active ingredients into a ternary system when two of three component s are supported simultaneously (''binary-section'' method).