Plugged ceramic honeycomb bodies with preferential catalyst loading and methods of manufacturing thereof

Abstract

A catalyst-coated, plugged honeycomb body having a honeycomb structure with a matrix of porous walls forming a plurality of channels, at least some of the plurality of channels being plugged to form inlet channels and outlet channels. At least some of the porous walls are filtration walls and at least some of the porous walls are non-filtration walls. A catalyst is preferentially disposed on the non-filtration walls, wherein the catalyst being preferentially disposed comprises CR<0.2 wherein CR is a coating ratio defined as an average percent loading of a washcoat containing the catalyst on and within the filtration walls divided by an average percent loading of the washcoat containing the catalyst on and within the non-filtration walls. Methods and apparatus configured to preferentially apply a catalyst-containing slurry to the non-filtration walls are provided, as are other aspects.

Dependencies are inferred from the claim text.