| abstract |
Compositions for reduction of NO x generated during a catalytic cracking process, preferably, a fluid catalytic cracking process, are disclosed. The compositions comprise a fluid catalytic cracking catalyst composition, preferably containing a Y-type zeolite, and a particulate NO x composition containing particles of a zeolite having a pore size ranging from about 3 to about 7.2 Angstroms and a SiO 2 to Al 2 O 3 molar ratio of less than about 500. Preferably, the NO x reduction composition contains NO x reduction zeolite particles bound with an inorganic binder. In the alternative, the NO x reduction zeolite particles are incorporated into the cracking catalyst as an integral component of the catalyst. Compositions in accordance with the invention are very effective for the reduction of NO x emissions released from the regenerator of a fluid catalytic cracking unit operating under FCC process conditions without a substantial change in conversion or yield of cracked products. Processes for the use of the compositions are also disclosed. |