CATALYSED PARTICULATE FILTER FOR USE IN PASSIVE SELECTIVE CATALYTIC REDUCTION Russian patent published in 2019 - IPC B01D53/94 F01N3/22 F01N3/10 F01N3/28 B01J23/42 B01J23/44 B01J35/04 B01J37/02 B01J37/03 

FIELD: machine building.

SUBSTANCE: invention relates to devices for treating exhaust gases. Disclosed is a catalysed particulate filter comprising a porous substrate with flow walls, a catalyst for selective catalytic reduction (SCR), a palladium component and a platinum component. Substrate with flow walls includes inlet end, output end, length along substrate axis, which extends between inlet end and outlet end, and multiple channels defined by inner walls of substrate with flow walls. Plurality of channels includes input channels having an open input end and a closed output end, and output channels having a closed input end and an open output end. SCR catalyst is provided on the entire surface of the walls of the inlet channels and on at least part of the surface of the pores inside the walls of the channels under the surface of the walls of the channels coated with the SCR catalyst. Palladium component is provided on a portion of the surface of the walls of the inlet channels and at least a portion of the surface of the pores inside the walls of the channels under the surface of parts of the walls of the channels coated with a palladium component. Said part of walls of inlet channels coated with palladium component extends from input end to x % of length along substrate axis, where 0 < x <100. Platinum component is provided on a part of the surface of the walls of the outlet channels and on at least part of the surface of the pores inside the walls of the channels inside the surface of parts of the walls of the channels coated with a platinum component. Said part of outlet channels walls covered with platinum component extends from output end to 100−x % of length along substrate axis. Disclosed also is a method of producing a catalysed particulate filter and possibility of use thereof, including a method of processing emissions of an internal combustion engine.

EFFECT: technical result is higher efficiency of exhaust gases treatment.

14 cl, 3 tbl