Patent ID: 6528032
Filing Date: 2003-03-04
Classification: B01D,C01B

Abstract:
A method of selectively removing carbon monoxide, comprising:preparing a catalyst bed capable of selectively oxidizing carbon monoxide and including a plurality of catalyst layers arranged in series and said plurality of catalyst layers differing from each other in the temperature of application and arranged in the order of the application temperature such that the catalyst layer having the lowest application temperature constitutes the upstream side of the catalyst bed; and introducing a gaseous mixture containing H2, CO and an oxidizing agent of O2 into said catalyst bed through the upstream side of the catalyst bed and supplying an additional oxidizing agent to the gaseous mixture when the gaseous mixture is introduced into the catalyst layer having a higher application temperature so as to selectively oxidize and remove CO from the gaseous mixture; wherein said plurality of catalyst layers comprises: a first catalyst layer comprising a carrier and Pt as an active metal and supported on said carrier; and a second catalyst layer comprising a carrier and Ir supported on said carrier.