SELECTIVE CATALYTIC REDUCTION CATALYST Russian patent published in 2022 - IPC B01J23/22 B01J23/30 B01J29/18 B01J29/70 B01J29/80 B01D53/94 

FIELD: chemistry.

SUBSTANCE: present invention relates to a composition of a selective catalytic reduction catalyst for conversion of nitrogen oxides (NO_x) in exhaust gases, using a nitrogen reducing agent. The catalytic composition contains a mixture of the first component and the second component, while the mass ratio of the first component to the second component is from 10:90 to 25:75. The first component is H form of aluminosilicate chabazite zeolite (CHA); or a mixture of H form of aluminosilicate mordenite zeolite (MOR) and H form of aluminosilicate chabazite zeolite (CHA). The second component is vanadium oxide applied to a metal-oxide carrier. The metal-oxide carrier is titanium dioxide, titanium dioxide stabilized with silicon dioxide, or a mixture of titanium dioxide and titanium dioxide stabilized with silicon dioxide. The invention also relates to catalytic coating of porous oxide, a catalytic product coated with catalytic coating, a catalytic product containing a catalytic composition, an exhaust system containing a catalytic composition, an internal combustion engine of a motor vehicle, containing an exhaust system, a motor vehicle containing an engine.

EFFECT: improved activity of NO_x conversion, and decreased formation of N₂O.

20 cl, 4 tbl, 3 ex