FCC of nitrogen containing hydrocarbons and catalyst regeneratio

Details FCC of nitrogen containing hydrocarbons and catalyst regeneratio FCC of nitrogen containing hydrocarbons and catalyst regeneratio

1992-06-24

1993-12-07

Konopka, Paul E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208120, 208164, 502 41, 502 42, 502 43, C10G 1118, C10G 1105, B01J 3836, B01J 2938

Patent

active

052680894

ABSTRACT:
Oxides of nitrogen (NO.sub.x) emissions from an FCC regenerator are reduced by forcing the regenerator to operate between full and partial CO burn mode. Operating with less than 1 mole % O2 and up to 1 or 2% CO in the flue gas creates conditions which oxidize nitrogen compounds in coke on spent catalyst to NOx, and simultaneously convert NOx in the regenerator to nitrogen. A downstream CO boiler can burn this low CO flue gas without producing large amounts of NOx. Most NOx emissions can be eliminated. An apparatus, with the regenerator air:coke ratio controlled by both CO and O2 analyzers monitoring regenerator flue gas, is also disclosed.

REFERENCES:
patent: 4180454 (1979-12-01), Luckenbach
patent: 4198287 (1980-04-01), Hemler, Jr. et al.
patent: 4812430 (1989-03-01), Child
patent: 5002654 (1991-03-01), Chin
patent: 5077251 (1991-12-01), Owen et al.
patent: 5077252 (1991-12-01), Owen et al.

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