| abstract |
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 x . The acidic oxide support preferably contains silica alumina. Ceria is the preferred oxygen storage oxide. |