Magnesium aluminum silicate structures for DPF applications

Details Magnesium aluminum silicate structures for DPF applications Magnesium aluminum silicate structures for DPF applications

2006-11-28

2006-11-28

Greene, Jason M. (Department: 1724)

Gas separation

Specific media material

Ceramic or sintered

C055S282200, C055S282300, C055S385300, C055SDIG007, C055SDIG010, C055SDIG030, C060S311000, C264S628000, C264S631000, C264S638000, C264S044000, C264S653000, C264SDIG048

Reexamination Certificate

active

07141089

ABSTRACT:
A ceramic filter for trapping and combusting diesel exhaust particulates composed of an end-plugged cordierite honeycomb structure exhibiting a pore size distribution as determined by mercury porosimetry in which the quantity d50/(d50+d90) as related to pore size distribution is less than 0.70, a soot loaded permeability factor Sf, as defined by the equation [d50/(d50+d90)]/[% porosity/100], of less than 1.55, and, a coefficient of thermal expansion (25–800° C.) of no greater than 17×10−7/° C. The ceramic filter further exhibits a median pore diameter, d50, of at least 4 micrometers and up to 40 micrometers. A method of making the filter is provided.

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