CATALYTIC PRODUCT FOR EXHAUST GASES TREATMENT Russian patent published in 2019 - IPC B01J29/72 B01D53/86 F01N3/10 B60K13/04 

FIELD: chemistry.

SUBSTANCE: disclosed is a catalytic article consisting of (a) a flow-through honeycomb substrate with channel walls; (b) first catalyst composition NH₃-SCR applied on and/or inside walls of channels in first zone; and (c) a second catalyst composition NH₃-SCR applied on and/or inside walls of channels in second zone, provided that first zone is located upstream of second zone, and the first and second zones are located next to each other or at least partially overlapping; and where first composition of catalyst NH₃-SCR comprises first molecular sieve containing copper, with atomic ratio of copper to aluminium from about 0.1 to 0.375, and second catalyst composition NH₃-SCR contains second molecular sieve containing copper, with atomic ratio of copper to aluminium from approximately 0.3 to approximately 0.6.

EFFECT: disclosed is a catalytic product for treating exhaust gases.

3 cl, 16 dwg