Patent ID: 9662636
Date: 2017-05-30
CPC Classifications: B01D,B01J,B05D,Y02T

Claim:
1. A zoned catalyst composite for an exhaust stream of an internal combustion engine comprising: a monolithic carrier comprising a plurality of longitudinal passages; a zone that begins from one end of the carrier and extends axially along the longitudinal passages such that the zone has a flat profile, the zone comprising a catalytic material that is effective to convert and/or trap one or more components in the exhaust stream; wherein at least one of the following conditions is met: (i) the distance of the zone from the one end of the carrier varies in the range of 0 to 15% from passage-to-passage; and (ii) for each passage, the thickness of the zone at the one end of the carrier as compared to the thickness at the end of the zone varies in an amount of not more than 15%.