EMISSIONS TREATMENT ARTICLES WITH INORGANIC FILTRATION DEPOSITS AND CATALYTIC MATERIAL

A filtration article comprises inorganic deposits at inlet sides of porous ceramic base portions of a filter body; and a catalytic material, disposed at outlet sides of porous ceramic base portions of walls. Interposing regions are located between wall inlet sides and outlet sides. A majority or all of the inorganic deposits are spaced away from a majority of the catalytic material by interposing regions. Also a method comprising applying catalytic material at outlet sides such that a desired amount is disposed on, in, or on and in the walls, without catalytic material reaching inlet sides to yield a catalytically dense region, and exposing the filter body to a surface treatment to deposit inorganic deposits at inlet sides to yield an inorganic deposit region, wherein a majority of the catalytic material is spaced away from a majority or all inorganic deposits at a given axial location by interposing regions.