CATALYSTS FOR EXHAUST GAS TREATMENT Russian patent published in 2020 - IPC B01J29/64 B01J29/72 B01J23/74 B01J23/34 B01J29/85 F01N3/20 

FIELD: chemistry.

SUBSTANCE: invention relates to a catalyst effective for reducing NO_x, hydrocarbons and carbon monoxide from exhaust gas of a gasoline engine. At that, the catalyst contains: a substrate having the first and second material located on it, where the first material is effective for catalysis of selective catalytic reduction of nitrogen oxides in the presence of ammonia, and second material is effective for reducing hydrocarbons and carbon monoxide; where a) first material comprises a molecular sieve promoted by copper or iron, in amount of 0.01 wt % to approximately 2 wt % based on oxide based on molecular sieve weight; and b) the second material comprises at least one oxide of a metal selected from Ni, Fe and Cu, on a substrate, selected from Ce, Ce-Zr, Mn, Zr, Pr and their combinations; where the first material and the second material are free of platinum group metal. Invention also relates to a system for treating exhaust gas and a method of treating exhaust gas from a gasoline engine.

EFFECT: technical result consists in reduction of NO_x during processing of exhaust gas from gasoline engine.

38 cl, 10 dwg, 3 tbl, 15 ex