Catalyst for CO shift reaction

摘要

A practical catalyst exhibiting especially high CO shift reaction activity in a low temperature region where CO is favorably converted to H2 in equilibrium includes a carrier which is composed of titania as a main component, a noble metal which is supported on the carrier, and a sulfur-containing material which adheres to the carrier. The titania carrier to which the sulfur-containing material adheres exhibits high solid acid strength, and accordingly acts to absorb electrons from noble metal so that noble metal becomes partially oxidized. This results in the CO adsorbing ability decreasing to restrain poisoning of noble metal due to CO, whereby the CO shift reaction activity in a low temperature region is improved.