FCC regenerator NO.sub.x reduction by homogeneous and catalytic

Details FCC regenerator NO.sub.x reduction by homogeneous and catalytic FCC regenerator NO.sub.x reduction by homogeneous and catalytic

1995-08-30

1998-01-06

Griffin, Walter D.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208120, 423235, 502 38, C10G 1100, C01B 2102

Patent

active

057050538

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 thermal and catalytic processing of the flue gas. Partial CO burn FCC catalyst regeneration produces flue gas with CO and NO.sub.x precursors. Air is added and most NO.sub.x precursors homogeneously converted while leaving some CO unconverted. Downstream catalytic conversion then reduces produced NO.sub.x with unconverted CO.

REFERENCES:
patent: 4405587 (1983-09-01), McGill et al.
patent: 4519993 (1985-05-01), McGill et al.
patent: 5021144 (1991-06-01), Alrichter
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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