DEVICE FOR AND METHOD OF PROCESSING OF WASTE GASES FORMED WHEN ENGINE OPERATES ON LEAN MIXTURES BY SELECTIVE CATALYTIC REDUCTION OF NITROGEN OXIDES

摘要

FIELD: mechanical engineering; internal combustion engines.;SUBSTANCE: invention can be used in engine exhaust system. Proposed device for processing of exhaust gases by selective catalytic reduction of nitrogen oxides in exhaust gases formed when engine operates on lean mixtures includes at least one catalyst with catalytically active component for selective catalytic reduction (components for scr) and at least one accumulating component for nitrogen oxides (components for NO). Device contains also oxidizing catalyst arranged before selective catalytic reduction catalyst and accumulating component for nitrogen oxides is at least one compound of element chosen from row including alkaline metals, alkaline-earth metals and cerium. Method of removal of nitrogen oxides from exhaust gases is provided.;EFFECT: reduced concentration of nitrogen oxides in exhaust gases formed at operation on lean mixtures.;18 cl, 3 dwg