CATALYZED FILTER FOR TREATING EXHAUST GAS

摘要

Provided is a wall-flow filter coated with an SCR catalyst composition, wherein the catalyst composition contains transition metal promoted molecular sieve crystals, and wherein (i) the crystals have a mean crystalline size of about 0.5 pm to about 15 pm, (ii) the crystals are present in said composition as individual crystals, agglomerations having a mean particle size of less than about 15 pm, or a combination of said individual crystals and said agglomerations; and (iii) said molecular sieve is an aluminosilicate or a silico-aluminophosphate of a Framework Type having a maximum ring size of eight tetrahedral atoms.