IMPROVED SOOT CATALYTIC FILTER Russian patent published in 2019 - IPC F01N3/00 

FIELD: machine building.

SUBSTANCE: present disclosure relates to a soot catalytic filter, particularly for treating a diesel engine exhaust with a coating structure. Catalytic soot filter, the substrate of which with flow walls contains at least one layer containing at least one oxidation catalyst, and, at least, one layer containing at least one suppressing H₂S material. At least one oxidation catalyst and mentioned at least one suppressing H₂S material is separated by inner walls of filter substrate with flow walls. Total length of the coating is x+y, and x+y≥150 (as a percentage of the axial length of the substrate). Inlet coating contains said at least one suppressing H₂S material, and the output coating contains said at least one oxidation catalyst.

EFFECT: invention provides filtration of soot particles, promotes oxidation of carbon monoxide (CO) and produces low emissions of H₂S during engine normal operation and regeneration events.

15 cl, 7 dwg, 3 tbl