INFLUENCE OF H2O AND SO2 ON THE ACTIVITY OF DEPOSITED COBALT OXIDE CATALYSTS IN THE PROCESSES OFREDUCTION OF NITROGEN(I),(II) OXIDES WITH CARBON MONOXIDE AND C3-C4 ALKANES

摘要

It is shown that palladium-cobalt oxide-cerium catalyst deposited on cordierite catalyzes the reduction of nitrogen(II) oxide with carbon monoxide, and cobalt-iron catalysts in simultaneous reduction of NO + N2O with C3-C4 alkanes retained high activity in the presence of water vapor and sulfur dioxide. The Pd-Co3O4/cordierite catalyst exceeds the Pt-Co3O4/codierite catalyst in the conversion of NO and CO in the reaction mixture CO + NO + O2 + H2O + SO2. Modification of the Pd-Co3O4/cordierite with cerium oxide considerably increases its sulfur resistance.