In order to study control of automobile exhaust gas, copper chromite and lanthanium cobalt oxide catalysts were prepared by impregnation method, and their structure was checked by X-ray diffraction method. γ-Alumina was used as a catalyst support.
The effect of operating conditions and thermal treatments of the catalysts on reaction rate of carbon monoxide in a packed bed reactor was considered. The reaction rate increased with CO partial pressure, but slightly decreased with $O_2$ partial pressure for copper chromite and lanthanium cobalt oxide catalysts. The effects of mass transfer and heat transfer were negligible in the experimental range.
On the copper chromite catalyst, lattice oxygen participated in $Co-O_2$ reaction, but not on the lanthanium cobalt oxide catalyst.
