FCC NO.sub.x reduction by turbulent/laminar thermal conversion

Details FCC NO.sub.x reduction by turbulent/laminar thermal conversion FCC NO.sub.x reduction by turbulent/laminar thermal conversion

1995-08-30

1998-02-10

Caldarola, Glenn

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208120, 423235, 502 34, 502 38, 502 49, C10G 1100, C01B 2100, B01J 3814

Patent

active

057165149

ABSTRACT:
Oxides of nitrogen (NO.sub.x) emissions from an FCC regenerator are reduced by operating the regenerator in partial CO burn mode and controlled turbulent/laminar flow processing of the flue gas. Partial CO burn FCC catalyst regeneration produces flue gas with CO and NO.sub.x precursors. Air is added to a turbulent flow reactor such as a flue gas transfer line where most NO.sub.x precursors are homogeneously converted while leaving some CO unconverted. A downstream CO boiler thermally converts this unconverted CO. NO.sub.x emissions are less than would be experienced using a like amount of air injection to a conventional CO boiler.

REFERENCES:
patent: 4405587 (1983-09-01), McGill et al.
patent: 4519993 (1985-05-01), McGill et al.
patent: 5021144 (1991-06-01), Altrichter
patent: 5240690 (1993-08-01), Tang et al.
patent: 5268089 (1993-12-01), Avidan et al.
patent: 5372706 (1994-12-01), Buchanan et al.

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