SCR CATALYST Russian patent published in 2019 - IPC B01J29/76 B01D53/34 B01D53/94 B60K13/04 F01N3/10 

FIELD: chemistry.

SUBSTANCE: disclosed is a catalyst composition for reducing NO_x and/or NH₃ oxidation, including a copper-containing zeolite having a CHA structure, with a molar ratio of silicon dioxid to aluminum oxide (SAR) equal to 40, and an atomic ratio of copper to aluminum of 1.25, wherein said zeolite is free from exchanged copper ions and is free of transition metals in its structure. Proposed is a catalytic product for cleaning exhaust gases; catalytic composition for NO_x reduction and/or NH₃ oxidation (versions); method of purifying exhaust gases; system for purifying exhaust gases containing NO_x.

EFFECT: technical result is obtaining zeolites as a catalyst, which is less susceptible to high-temperature hydrothermal degradation thereby reducing loss of activity.

18 cl, 1 tbl