| 摘要 |
A minor portion of the regeneration gas used to regenerate spent fluid catalytic cracking catalyst is passed into a distribution means located at the interface between the dense phase catalyst bed and the dilute catalyst phase in the regeneration zone of a fluid catalytic cracking process to combust, at said interface, the carbon monoxide formed in said bed to carbon dioxide. In a preferred embodiment, the level of the dense phase bed can be adjusted to vary the amount of catalyst entrained in the dilute catalyst phase such that the distribution means will be partially submerged. This serves to provide a simple and convenient method to absorb the heat released by the oxidation of carbon monoxide, thereby minimizing or eliminating excessive or undesirable afterburning in the dilute catalyst phase and in equipment downstream thereof.
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