Metal block catalysts for complex cleaning of harmful emissions of transport and the industry

Abstract

The aim of the work is the synthesis and testing of catalysts on metal block carriers in the processes of complex gas cleaning of CO, C3H8, NO and deep oxidation of propane-butane and CO. The active phase of the catalysts was prepared on the basis of the compounds Pt, Pd, Ir, Au, Mn, Fe, Ni. The washcoat composition was based on alumina and zeolites. Catalysts prepared from colloids Pt, Pd, Ir, Au, possess high activity in the oxidation of hydrocarbons (100% in the range 573-773 K) and in the reduction reaction of nitrogen oxides-up to 67.0-69%. Among the catalysts containing manganese in the active phase, the most active was a catalyst prepared by introducing an organometallic compound based on polyethylene glycol into a washcoat suspension: the degree of CO oxidation was 93-100%, hydrocarbons-up to 82-83.2% at 623 K. While studying full-size samples of catalysts based on platinum on the stand on the basis of a diesel generator the degree of conversion of CO-100%, hydrocarbons-above 98-99%, nitrogen oxides-58-63% was achieved.