Narrow pore size distribution cordierite filters with...

Details Narrow pore size distribution cordierite filters with... Narrow pore size distribution cordierite filters with...

2007-12-18

2007-12-18

Greene, Jason M. (Department: 1797)

Gas separation

Specific media material

Ceramic or sintered

C055S282200, C055S282300, C055S385300, C055SDIG010, C055SDIG030, C060S311000

Reexamination Certificate

active

11651685

ABSTRACT:
A diesel particulate filter having a honeycomb body composed of cordierite and exhibiting a CTE (25-800° C.) of less than 13×10−7/° C.; a median pore diameter, d50, of less than 25 μm; % porosity not less than 53%; and a narrow pore size distribution wherein a value of d50−d10)/d50is not greater than 0.6; and a value of d90less than 40 μm wherein d10, and d90are pore diameters at 10% and 90% of the pore size distribution on a volumetric basis, and d10<d50<d90. The particulate filter preferably exhibits a plugged, wall-flow honeycomb filter body composed of cordierite and having a plurality of parallel end-plugged cell channels traversing the body from a frontal inlet end to an outlet end thereof.

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Hashimoto et al., , “SiC and Cordierite Diesel Particulate Filters Designed for Low Pressure Drop and Catalyzed, Uncatalyzed Systems,” SAE Technical Paper 2002-01-0322, p. 1-14.
Nakatani et al., ,“Simultaneous PM and NOx Reduction System for Diesel Engines”, SAE Technical Paper 2002-01-0957, p. 1-10.

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