| 摘要 |
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 NHto N, which reduces amount of ammonia in exhaust flow.32 cl, 7 dwg, 2 tbl, 3 ex |
