초록 ▼

Compositions comprising a component containing (i) an acidic oxide support, (ii) an alkali metal and/or alkaline earth metal or mixtures thereof, (iii) a transition metal oxide having oxygen storage capability, and (iv) palladium promote CO combustion in FCC processes while minimizing the formation

Compositions comprising a component containing (i) an acidic oxide support, (ii) an alkali metal and/or alkaline earth metal or mixtures thereof, (iii) a transition metal oxide having oxygen storage capability, and (iv) palladium promote CO combustion in FCC processes while minimizing the formation of NO.sub.x. The acidic oxide support preferably contains silica alumina. Ceria is the preferred oxygen storage oxide.

대표청구항 ▼

[ What is claimed is:] [1.] A particulate composition suitable for use in a fluidized catalytic cracking process, said composition having a particle size of about 20-200 .mu.m and consisting essentially of (i) an acidic oxide support containing at least 50 wt. % alumina (ii) an alkali metal or mixtu

[ What is claimed is:] [1.] A particulate composition suitable for use in a fluidized catalytic cracking process, said composition having a particle size of about 20-200 .mu.m and consisting essentially of (i) an acidic oxide support containing at least 50 wt. % alumina (ii) an alkali metal or mixtures thereof, (iii) CeO.sub.2, and (iv) palladium wherein said composition comprises about 1-10 parts by weight of said alkali metal, measured as alkali metal oxide, at least 1 part by weight of CeO.sub.2 and about 0.01-5.0 parts by weight palladium, all parts being 100 parts by weight of said acidic oxide support material, and wherein said composition promotes CO combustion during a FCC catalyst regeneration process step while simultaneously reducing the level of NOx emitted during the regeneration step.