METHOD FOR PRODUCING CERAMIC CATALYST BODY

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a ceramic catalyst body capable of making a catalyst carried directly on a ceramic carrier without forming a coating layer on the ceramic carrier.

SOLUTION: A catalyst carrying solution containing a catalyst component composed of a negative complex ion produced from a catalyst precursor is prepared. when a surface potential of a parent phase of the ceramic carrier containing a parent phase composed of a cordierite-W complex for the pH of the catalyst carrying solution and hetero-facies composed of a compound except the cordierite-W complex is E1 and a surface potential of hetero-facies of the ceramic carrier is E2, the pH of the catalyst carrying solution is adjusted so as to be E1>E2 and E1>0 to make the ceramic carrier contact with the catalyst carrying solution to be carried. Thereafter, a heat treatment is carried out to carry the catalyst on the ceramic carrier by bonding the parent phase composed of the cordierite-W complex with the catalyst component.

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