COBALT CATALYSTS IN SELECTIVE CATALYTIC REDUCTION OF NO BY METHANE

Impregnated cobalt-containing catalysts are studied in the selective c atalytic reduction of NO by methane. The active component of all the i mpregnated cobalt-containing catalysts is Co3O4. The role of O-2 seems to maintain the surface stoichiometry of Co3O4. The main reason of de crease of catalytic activity of samples based on MgO, SiO2, Al2O3 in s elective catalytic reduction of NO is due to oxide-oxide interaction p romoted by water. Catalysts based on montmorillonite (HMM) are stable in the presence of water. All the carriers can be placed by the capabi lity for oxide-oxide interaction in the following order: SiO2 much gre ater than MgO > Al2O3 much greater than HMM.