Effect of Slurry Preparation on CuO/CeO2 based Monoliths for CO Preferential Oxidation in H2-rich Streams

Negligible washcoat weight loss on monolithic catalysts is obtained by modifying the preparation of the slurry used for dip-coating, in particular by wet milling of the starting ceria or by colloidal cera addition. The as prepared monoliths showed reduced CO conversion, due to a partial penetration of the washcoat into the cordierite macropores, and improved selectivity to CO2, due to a better copper dispersion. They also showed improved resistance to deactivation in presence of CO2 and H2O.