| abstract |
The invention relates to a catalytic system and its manufacturing method. The catalytic system consists of a support on which the catalytically active product is deposited. The support has advantageous mechanical or physical properties for the required operating conditions, but a poor specific surface. The catalytically active product, a metal carbide, is obtained by embedding the support in a suspension of a reducible compound of the metal in a solution of an organic compound, carbonization of this compound, reduction of the metal compound and carburization of the metal. The carbide thus obtained has a high specific surface. Preferably, the support consists of silicon carbide prepared by carbonization of a paste containing silicon, carbon and an organic resin. The invention applies to any form of catalyst, but in particular to monolithic catalysts intended for the treatment of exhaust gases. |