Patent ID: 8093173
Filing Date: 2012-01-10
Classification: B01D

Abstract:
1. A honeycomb catalytic article comprising partition walls having: a porous partition wall matrix separating and forming a plurality of cells functioning as fluid passages, and a surface layer provided on only the inflow side or each of the inflow side and the outflow side of the partition wall matrix; with predetermined cells each of which has an open end portion on one side and a plugged end portion on the other side and remaining cells each of which has a plugged end portion on the one side and an open end portion on the other side being alternately disposed, and a catalyst being loaded on surfaces of inner pores of the surface layer and on a surface of the surface layer; wherein a relation between a catalyst area proportion A of the catalyst to a gap area proportion B of a gap in a cross-section of the surface layer on the inlet side is 1%<A/B<90% in a central portion in a thickness direction of the surface layer, and a relation between an average catalyst area proportion Al from the surface to a point having a depth of one third of the thickness of the surface layer including the surface of the surface layer on the inlet side and a catalyst area proportion A