Catalytic filter having a short light-off time

Details Catalytic filter having a short light-off time Catalytic filter having a short light-off time

F - Mech Eng,Light,Heat,Weapons

01

N

F01N 3/28 (2006.01)

Patent

CA 2640946

The invention relates to a catalytic filter for the treatment of a gas laden with soot and pollutant particles in a gas phase, comprising a plurality of monolithic honeycomb blocks connected together by a jointing cement, the thermal conductivity of which is greater than 0.3 W/m.K, said filter being characterized in that at least the monolithic blocks placed in the central part of the filter, and preferably all of the monolithic blocks, have, along a radial direction, a peripheral portion whose total filtration area is greater than the total filtration area of the central portion of said blocks.

L'invention se rapporte à un filtre catalytique pour le traitement d'un gaz chargé en particules de suies et de polluants en phase gazeuse,comprenant une pluralité de blocs monolithiques en nid d'abeille reliés entre eux par un ciment de joint dont la conductivité thermique est supérieure à 0,3 W/m.K, ledit filtre se caractérisant en ce qu'au moins les blocs monolithiques placés dans la partie centrale du filtre, de préférence l'ensemble des blocs monolithiques, présentent suivant une direction radiale une portion périphérique dont la surface de filtration totale est supérieure à la surface de filtration totale de la portion centrale desdits blocs.

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