Conversion of NO.sub.x in FCC bubbling bed regenerator

Details Conversion of NO.sub.x in FCC bubbling bed regenerator Conversion of NO.sub.x in FCC bubbling bed regenerator

1992-10-20

1995-01-17

Sneed, Helen M. S.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208113, 208118, 4232391, 4232392, 502 42, C10G 1100, C01B 2100

Patent

active

053823524

ABSTRACT:
Oxides of nitrogen (NO.sub.x) emissions from FCC regenerators in complete CO combustion mode are reduced by degrading regenerator performance to increase the coke on regenerated catalyst. High zeolite content cracking catalyst, regenerated to contain more coke, gives efficient conversion of feed and reduces NO.sub.x emissions from the regenerator. Operating with less catalyst, e.g., 30-60% of the normal amount of catalyst in the bubbling dense bed, can eliminate most NO.sub.x emissions while increasing slightly plant capacity and reducing catalyst deactivation.

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patent: 4812430 (1989-03-01), Child
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patent: 5015362 (1991-05-01), Chin
patent: 5106799 (1992-04-01), Green et al.

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