METHOD OF LOW TEMPERATURE SELECTIVE CATALYTIC REDUCTION OF NO BY MEANS OF HYDROCARBONS, THE EXHAUST SYSTEM FOR NO PROCESSING AND ITS ARRANGEMENT Russian patent published in 2012 - IPC B01D53/94 B01D53/56 F01N3/10 

FIELD: chemical industry.

SUBSTANCE: group of inventions relates to selective catalytic reduction of nitrogen oxides in exhaust gases resulting in production of nitrogen and can be applied to the chemical industry and engines construction industry; the method includes oxidizing of nitrogen monoxide into nitrogen dioxide by means of the catalyst (a transition metal/zeolite) with the temperature of the catalyst layer lower than 50°C and reduction of nitrogen oxides on the catalyst by means of hydrocarbonic reducing agents with the temperature of the catalyst layer lower that 150°C; herewith it is offered the exhaust system for processing of nitrogen oxides contained in exhaust gases for implementation of this method along with the device including the internal combustion engine operating on the lean mixture furnished with the above exhaust system.

EFFECT: method allows to reduce nitrogen oxides in cool exhaust gases right after the start-up thereby significantly contributing to reduction of nitrogen oxides emission during the driving cycle.

30 cl, 2 tbl, 7 dwg, 7 exl