NO ADSORBER-CATALYST Russian patent published in 2021 - IPC B01J37/02 B01J23/63 B01J35/04 B01D53/94 B01J29/74 

FIELD: exhaust gas processing.

SUBSTANCE: invention relates to a trap catalyst of depleted NO_x containing: i) the first layer, wherein the specified first layer contains a mixture or a platinum and palladium alloy, the first inorganic oxide that is selected from a group consisting of aluminum oxide and silicon dioxide-aluminum oxide, an activator, where this activator contains barium, and hydrocarbon-absorbing material, wherein hydrocarbon-absorbing material is beta-zeolite; and ii) the second layer, wherein the specified second layer contains one or several platinum group metals, oxygen storage-capable (hereinafter – OSC) material, where the specified OSC is selected from a group consisting of cerium oxide and mixed cerium oxide-zirconium dioxide, and the second inorganic oxide, wherein the specified second inorganic oxide is selected from a group consisting of aluminum oxide and complex lanthanum oxide/aluminum oxide; where the first layer does not essentially contain oxygen storage-capable (OSC) material, and where the second layer is applied to the first layer. The invention also relates to a device for processing gas emissions for processing a flow of exhaust gases and to a method for processing exhaust gases.

EFFECT: obtaining improved characteristics of NO_x, CO and/or HC storage and conversion.

13 cl, 1 tbl, 4 dwg, 4 ex