OXIDATION CATALYST FOR INTERNAL COMBUSTION ENGINE EXHAUST GAS TREATMENT Russian patent published in 2017 - IPC B01J23/42 B01J23/44 B01J29/68 B01J37/02 B01D53/94 

FIELD: chemistry.

SUBSTANCE: invention relates to an oxidation catalyst for the oxidation treatment of hydrocarbons (HC) and carbon monoxide (CO) in exhaust gases in which the oxidation catalyst comprises a support base and catalyst layers is fixed on a support base, wherein each catalyst layer comprises a porous oxide coating material, An active metal and an adsorbent of hydrocarbons, and wherein the second catalyst layer is located on the side of the surface catalyst bed and the first catalyst layer is located on the side below the second A catalyst bed; and where: a) the amount of the hydrocarbon adsorbent in the second catalyst layer is greater than the amount of the hydrocarbon adsorbent in the first catalyst bed, and the concentration of the active metal in the second catalyst layer is the same or less than the concentration of the active metal in the first catalyst layer; Or (b) the amount of the hydrocarbon adsorbent in the second catalyst layer is the same as the amount of hydrocarbon adsorbent in the first catalyst bed and the concentration of the active metal in the second catalyst layer is less than the concentration of the active metal in the first catalyst layer, and each coating material Is selected from SiO₂, Al₂O₃, CeO₂ and TiO₂, and each active metal is a noble metal and, optionally, a non-noble metal, where each noble metal is platinum, palladium, or gold, or a mixture of two or more thereof, and wherein each base metal is nickel, copper, manganese, iron, Cobalt or zinc, and each hydrocarbon adsorbent is a zeolite. The invention also relates to a vehicle comprising an internal combustion engine running at lean fuel mixtures, wherein the exhaust system comprises the aforementioned oxidation catalyst.

EFFECT: preparation of an improved activity catalyst for the oxidative treatment of hydrocarbons and carbon monoxide in the exhaust gases by reducing the possibility of preventing poisoning of the selective catalytic reduction catalyst.

8 cl, 3 tbl, 7 dwg, 10 ex