| 摘要 |
PURPOSE:To obtain catalyst carrier having stability at high temp. by crushing a mixture consisting of activated alumina with previously supported Ce, Ce oxide, and boehmite alumina sol acidified with HNO3 to form a slurry, and coating the slurry on the surface of the carrier and calcining. CONSTITUTION:The slurry described in the purpose is coated on the surface of a base material of a monolithic carrier plural times while the direction of coating is inversed several times, and the coated material is calcined. Preferred solid content of the slurry to be used is 36-50wt%, and preferred content of alumina in the solid component is 66-88wt% and the preferred content of ceria is 12- 34wt%. All of the catalyst carrier obtd. by this method has high heat stability, and has very high specific surface area because a large amt. of coated material is secured by the multiple repetition of coating operation. |
