Patent ID: 6099695
Filing Date: 2000-08-08
Classification: B01D,B01J

Abstract:
A process for purifying air containing CO and gaseous sulfur compounds comprising:providing a composite catalyst comprising Pd, ZnO and TiO.sub.2 as catalytically active components, said ZnO being in the form of a particulate carrier supporting said Pd on its surface, said Pd and being dispersed on the surface of particles of the ZnO so as to leave surface areas of the ZnO particles exposed to the air;contacting the air with the composite catalyst to oxidize the CO to CO.sub.2 and to adsorb the gaseous sulfur compounds onto the exposed surface area of the ZnO particles; andirradiating said catalyst with light such that said TiO.sub.2 oxidizes said gaseous sulfur compounds to sulfate ions which are not poisonous to said Pd.