CATALYSTS FOR REDUCING EMISSION OF AMMONIA WITH EXHAUST GASES FROM COMBUSTION OF RICH FUEL MIXTURE Russian patent published in 2016 - IPC B01D53/94 B01J29/72 B01J29/76 B01J29/85 B01J37/02 F01N3/10 

FIELD: chemistry.

SUBSTANCE: invention relates to catalysts used to reduce amount of ammonia in exhaust gases generated during combustion of rich fuel mixtures. System for reducing emission of ammonia contains first component containing a first substrate having a triple catalyst, where first component is located before second component containing a second substrate containing ammonia oxidation catalyst and oxygen-containing gas inlet arranged between components. Ammonia oxidation catalyst contains a first catalytic layer containing fine-pore molecular sieve containing a transition metal. First catalytic layer does not contain ruthenium, rhodium, palladium, rhenium, iridium, platinum.

EFFECT: providing high-selective conversion of NH₃ to N₂, which reduces amount of ammonia in exhaust flow.

32 cl, 7 dwg, 2 tbl, 3 ex