CPC C04B 38/0009 (2013.01) [B01D 46/247 (2013.01); B01D 46/249 (2021.08); B01D 46/2429 (2013.01); B01D 46/2455 (2013.01); B01D 46/2474 (2013.01); B01D 46/2484 (2021.08); B01D 46/2488 (2021.08); B01D 46/2494 (2021.08); B01D 46/24491 (2021.08); B01D 46/24492 (2021.08); B01D 53/9431 (2013.01); B01J 35/04 (2013.01); B01J 35/1076 (2013.01); B01J 37/0228 (2013.01); B01D 46/2498 (2021.08); C04B 2111/0081 (2013.01); C04B 2111/00793 (2013.01)] | 23 Claims |
1. A coated honeycomb body, comprising:
a honeycomb structure comprising a matrix of intersecting porous walls forming a plurality of axially-extending channels, at least some of the plurality of axially-extending channels being plugged to form inlet channels and outlet channels, wherein a total surface area of the outlet channels is greater than a total surface area of the inlet channels, and
wherein some of the porous walls are filtration walls that separate inlet channels from outlet channels and some of the porous walls are non-filtration walls,
wherein the honeycomb structure comprises a pattern of a plurality of central outlet cells surrounded by a plurality of surrounding outlet cells and a plurality of inlet cells,
wherein the central outlet cells are larger in cross-sectional area than the surrounding outlet cells,
wherein the central outlet cells comprise non-filtration walls and the surrounding outlet cells are devoid of non-filtration walls, and
wherein a catalyst is preferentially disposed on the non-filtration walls.
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