Improved catalyzed soot filter

Details Improved catalyzed soot filter Improved catalyzed soot filter

F - Mech Eng,Light,Heat,Weapons

01

N

F01N 3/035 (2006.01) B01D 39/20 (2006.01) B01D 53/94 (2006.01) B01J 23/04 (2006.01)

Patent

CA 2574680

An improved catalyzed soot filter is comprised of a porous ceramic having, on at least a portion of the porous ceramic, an amorphous catalytic phase comprised of an alkali containing oxide glass having therein Si, Al or combination thereof. The improved catalyzed soot filter may be formed by contacting a porous ceramic such as mullite, silcon carbide or cordierite with an alkali containing compound that is a silicate, aluminate or alumino- siliicate and heating to a temperature sufficient to form an amorphous catalytic phase fused to at least a portion of the porous ceramic.

L~invention porte sur un filtre à suie catalysé amélioré composé d~une céramique poreuse possédant, sur au moins une portion de la céramique poreuse, une phase catalytique amorphe comprenant un alcalin contenant du verre oxydé englobant du Si, Al ou une combinaison de ceux-ci. Le filtre à suie catalysé amélioré peut s~obtenir en mettant en contact une céramique poreuse comme de la mullite, du carbure de silicium ou de la cordiérite avec un alcalin contenant un composé de type silicate, aluminate ou aluminosilicate et en chauffant à une température suffisante pour constituer une phase catalytique amorphe fondue pour donner au moins une portion de la céramique poreuse.

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