High specific surface silicon carbide catalytic filter and...

Details High specific surface silicon carbide catalytic filter and... High specific surface silicon carbide catalytic filter and...

C - Chemistry, Metallurgy

04

B

C04B 38/00 (2006.01) B01D 53/94 (2006.01) F01N 3/022 (2006.01)

Patent

CA 2616730

The invention concerns a honeycomb structure, made of porous ceramic material, said structure being characterized in that the porous ceramic material forming it comprises: 50 to 95 wt. % of silicon carbide SiC; 5 to 50 wt. % of at least one oxide ceramic phase; said structure being further characterized by a porosity higher than 10 %, by a specific surface greater than 0.5 m2/g and by a bimodal pore size distribution. The invention also concerns a method for obtaining such a structure as well as a catalytic filter or support obtained from such a structure, after deposition of a catalyst.

L'invention se rapporte à une structure en nid d'abeilles, faite d'un matériau céramique poreux, ladite structure étant caractérisée en ce que le matériau céramique poreux qui la constitue comprend : de 50 à 95 % en masse de carbure de silicium SiC ; de 5 à 50 % en masse d'au moins une phase céramique oxyde ; ladite structure se caractérisant en outre par une porosité supérieure à 10%, par une surface spécifique supérieure à 0,5 m2/g et par une distribution des tailles de pore du type au moins bimodale. L'invention se rapporte également au procédé d'obtention d'une telle structure ainsi qu'au filtre ou support catalytique obtenu à partir d'une telle structure, après dépôt d'un catalyseur.

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