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) a transition metal selected from Groups Ib and/or IIb of the Periodic Table prov

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) a transition metal selected from Groups Ib and/or IIb of the Periodic Table provide NOx control performance in FCC processes. The acidic oxide support preferably contains silica alumina. Ceria is the preferred oxygen storage oxide. Cu and Ag are preferred Group I/IIb transition metals. The compositions are especially useful in the cracking of hydrocarbon feedstocks having above average nitrogen content.

대표청구항 ▼

1. A NOx removal composition suitable for reducing NOx emissions in the presence of a CO oxidation promoter during catalyst regeneration in a fluid catalytic cracking process, said composition comprising particles having a particle size of about 20-200 .mu.m and comprising (i) an acidic oxide suppor

1. A NOx removal composition suitable for reducing NOx emissions in the presence of a CO oxidation promoter during catalyst regeneration in a fluid catalytic cracking process, said composition comprising particles having a particle size of about 20-200 .mu.m and comprising (i) an acidic oxide support containing at least 50 wt % alumina, (ii) about 1-10 parts by weight of magnesium oxide; (iii) at least 1 part by weight of CeO2 and (iv) about 0.01-5.0 parts by weight, measured as metal oxide, of a transition metal selected from Group Ib of the Periodic Table, all of said parts by weight being per 100 parts by weight of said acidic oxide support material.