Catalysts for neutralization of waste gases of the vehicles and industry

Abstract

The article is about synthesis of catalysts on block metal carriers for neutralization of waste gases of the vehicles and the industry. Alumina or alumina with the addition of a zeolite or Ce⁴⁺, Ti⁴⁺, Zr⁴⁺, La³⁺, Fe³⁺ were used for preparation of the washcoats. The compounds of Mn, Ni, Co, Fe and the platinum group
metals were applied as the active phase. The synthesized catalysts were tested in the process of complete oxidation of NO_x, CO, C₃H₈ and NO_x+C₃H₆+O₂ reaction. It was revealed that activity of Pd-Mo of catalysts increased at addition in composition of the carrier of cations Ce⁴⁺ и Zr⁴⁺. The activity of palladium catalyst in oxidation reactions CO was equal to 90-100% and was independent of the concentration of metal, in complete oxidation of C₃H₈ at 473-623 K it was 78-90%, for Pt -containing catalyst – 95-100%. It was revealed that in case of the catalysts with base metals introducing of Ti4+ significantly increased the degree of reduction of nitrogen oxides with propylene.