CPC F01N 3/0222 (2013.01) [B01D 46/2429 (2013.01); B01D 46/2474 (2013.01); B01D 46/2482 (2021.08); B01D 46/24491 (2021.08); B01D 46/24492 (2021.08); B01D 46/24494 (2021.08); C04B 38/0006 (2013.01); C04B 2111/00793 (2013.01); F01N 2330/06 (2013.01)] | 27 Claims |
1. A particulate filter comprised of at least one porous ceramic wall, the wall comprising a microstructure comprising:
average bulk porosity >62% as measured by mercury porosimetry,
d10>10 μm,
d50>16 μm,
df<0.40,
d90<37 μm, and
surface porosity at the surface of the wall as measured by x-ray tomography is within 10% of an average mid-web porosity of the middle 30% of the wall, and wherein a minimum porosity measured at any point from the surface of the wall and perpendicularly into the wall to within 15 μm of the surface of the wall is at least 90% of the average porosity of the middle 30%.
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