NOADSORBING CATALYST Russian patent published in 2021 - IPC B01J23/63 B01D53/94 F01N3/10 

FIELD: chemistry.

SUBSTANCE: invention relates to NO_x adsorbing catalyst containing a composition comprising a neodymium-containing component, to a method for creating a neodymium-containing component, as well as to exhaust systems for engines running on lean mixtures that contain such NO_x adsorbing catalyst. An exhaust purification system for treating the exhaust gas flow comprises a diesel engine and a NO_x adsorbing catalyst; in which the diesel engine is in fluid communication with NO_x adsorbing catalyst. The specified NO_x adsorbing catalyst comprises a first layer comprising a composition containing: a substrate material; one or more platinum group metals located on this substrate material; and a NO_x accumulating material in which the substrate material contains alumina or a mixed oxide containing alumina; one or more platinum group metals contain a mixture or alloy of platinum and palladium; the NO_x accumulating material contains neodymium-doped cerium oxide.

EFFECT: improvement in the exhaust gas purification system due to the use of a NO_x adsorbing catalyst with improved characteristics of low-temperature NO_x accumulation, improved properties of NO_x release and desulfation.

13 cl, 1 dwg, 13 tbl