NO X reduction compositions for use in partial burn FCC...

Details NO X reduction compositions for use in partial burn FCC... NO X reduction compositions for use in partial burn FCC...

2011-07-12

2011-07-12

Griffin, Walter D (Department: 1774)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

C208S120010, C208S120250, C502S074000, C502S077000, C502S079000

Reexamination Certificate

active

07976697

ABSTRACT:
A NOxreduction composition and process of using the composition to reduce the content of NOxemissions and gas phase reduced nitrogen species released from the regeneration zone during fluid catalytic cracking of a hydrocarbon feedstock into lower molecular weight components is disclosed. The process comprises contacting a hydrocarbon feedstock during a fluid catalytic cracking (FCC) process wherein a regeneration zone of an fluid catalytic cracking unit (FCCU) is operated in a partial or incomplete combustion mode under FCC conditions, with a circulating inventory of an FCC cracking catalyst and a particulate NOxreduction composition. The NOxreduction composition has a mean particle size of greater than 45 μm and comprises (1) a zeolite component having (i) a pore size of form 2-7 A Angstroms and (ii) a SiO2to Al2O3molar ratio of less than 500, and (2) at least one noble metal selected from the group consisting of platinum, palladium, rhodium, iridium, osmium, ruthenium, rhenium and mixtures thereof.

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