CATALYTIC FILTER CONTAINING SOOT OXIDATION CATALYST AND SCR-CATALYST Russian patent published in 2020 - IPC B01D53/94 

FIELD: water and air purification technology.

SUBSTANCE: group of inventions relates to catalysts, systems and methods, which are used for cleaning exhaust gas, which is formed during combustion of hydrocarbon fuel, in particular, exhaust gas obtained on a lean mixture containing soot and nitrogen oxides formed by a diesel engine. Disclosed is a catalytic filter containing a mixture of a SCR catalyst and a soot oxidation catalyst, wherein the soot oxidation catalyst is a copper-doped cerium oxide, iron-doped oxide or manganese-doped cerium oxide. Mixture of SCR-catalyst and soot oxidation catalyst provides reduction of maximum oxidation temperature for removal of soot from filter.

EFFECT: disclosed group of inventions, particularly use of disclosed filter, enables to improve combustion of soot and reduce sensitivity of SCR-catalyst contained on filter, to degradation, as well as a soot oxidation catalyst also increases stability of SCR-catalyst to poisoning and subsequent deterioration of SCR performance.

28 cl, 4 tbl, 4 dwg