FCC regeneration process with low NO.sub.x CO boiler

Details FCC regeneration process with low NO.sub.x CO boiler FCC regeneration process with low NO.sub.x CO boiler

1993-03-01

1994-12-13

Sneed, Helen M. S.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

423235, 423236, 423237, 502 38, 502 41, C10G 1100

Patent

active

053727061

ABSTRACT:
Oxides of nitrogen (NO.sub.x) emissions from an FCC regenerator are reduced by operating the regenerator in partial CO burn mode and adding substoichiometric, or just stoichiometric air to the flue gas. Much CO and most NO.sub.x and NO.sub.x precursors are thermally converted at 2000.degree.-2900.degree. F., then the gas is cooled below about 1800.degree. F. and burning of CO completed.

REFERENCES:
patent: 3867507 (1975-02-01), Myerson
patent: 3873671 (1975-03-01), Reed et al.
patent: 3970743 (1976-07-01), Beavon
patent: 3987154 (1976-10-01), Lagas
patent: 4117075 (1978-09-01), Sano
patent: 4244325 (1981-01-01), Hart et al.
patent: 4405587 (1983-09-01), McGill et al.
patent: 4519993 (1985-05-01), McGill et al.
patent: 5240690 (1993-08-01), Tang et al.
Lyon, R. K., Int. J. Chem. Kinet., 3, 315, 1976.

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