CATALYST COMPOSITIONS, CATALYTIC ARTICLES, SYSTEMS AND PROCESSES USING LARGE PARTICLE MOLECULAR SIEVES

摘要

Described are catalyst compositions, catalytic articles, methods of manufacturing catalytic articles and exhaust gas treatment systems and methods that utilize the catalytic articles. The catalytic articles include a washcoat of platinum group metal on refractory oxide support particles, and further including a molecular sieve wherein greater than 90% of the molecular sieve particles have a particle size greater than &Igr;μι&eegr;.