MOLECULAR SIEVE CATALYST COMPOSITIONS, CATALYTIC COMPOSITES, SYSTEMS AND METHODS Russian patent published in 2020 - IPC B01J29/06 B01J29/16 B01J29/20 

FIELD: chemistry.

SUBSTANCE: invention describes a SCR catalyst for selective reduction of nitrogen oxides (NO_x), which includes a zeolite frame material of silicon and aluminum, in which part of silicon atoms is isomorphically substituted with Ti and catalyst is promoted with Cu, wherein zeolite frame material has silicon dioxide to tetravalent metal ratio in range from 1 to 25; and where zeolite frame material is selected from AEI, AFX, SNA. Also disclosed is a method of selective reduction of nitrogen oxides and a system for purifying exhaust gases. Invention also describes a catalyst composite (versions) for selective reduction of nitrogen oxides and accumulation of ammonia based on a SCR catalyst and a method for simultaneous selective reduction of nitrogen oxides and accumulation of ammonia.

EFFECT: technical result consists in providing selective reduction of nitrogen oxides with simultaneous accumulation of ammonia when treating exhaust gases.

25 cl, 26 dwg, 46 ex