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US 10,974,238 B2Granted
Process for combustion coke from coked catalyst
AssigneeUop LLC
InventorsZhihao Fei, Lisa M. Wolschlag, Brian W. Hedrick
Life of this patent
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Abstract
A counter-current catalyst regenerator with at least two stages of counter-current contact is proposed. Each stage may comprise a permeable barrier that allows upward passage of oxygen-containing gas and downward passage of coked catalyst into each stage, but inhibits upward movement of catalyst to mitigate back mixing and approximate true counter-current contact and efficient combustion of coke from catalyst.
Claims15
A process for combusting coke from coked catalyst comprising:
- passing a first stream of coked catalyst downwardly through a first permeable barrier into a first stage;
- propelling a first stream of oxygen-containing gas upwardly through said first stage in counter-current contact with said first stream of coked catalyst to combust coke from said first stream of coked catalyst to provide a second stream of coked catalyst including regenerated catalyst and a stream of flue gas;
- propelling said stream of flue gas upwardly from said first stage;
- inhibiting upward movement of said first stream of coked catalyst in said first stage;
- passing said second stream of coked catalyst downwardly from said first stage to a second stage below said first stage;
- propelling a second stream of oxygen-containing gas upwardly through said second stage in counter-current contact with said second stream of coked catalyst to combust coke from said second stream of coked catalyst to provide a third stream of coked catalyst including regenerated catalyst and said first stream of oxygen-containing gas including flue gas;
- and
- propelling said first stream of oxygen-containing gas from said second stage to said first stage;
- and inhibiting upward movement of said second stream of coked catalyst in said second stage.
6 more elements
A process for combusting coke from coked catalyst comprising:
- passing a first stream of coked catalyst downwardly through a first permeable barrier defining a first stage;
- propelling a first stream of oxygen-containing gas upwardly through said first stage in counter-current contact with said first stream of coked catalyst to combust coke from said first stream of coked catalyst to provide a second stream of coked catalyst including regenerated catalyst and a stream of flue gas;
- propelling said stream of flue gas upwardly from said first stage through said first permeable barrier;
- inhibiting upward movement of said first stream of coked catalyst in said first stage by said first permeable barrier;
- passing said second stream of coked catalyst downwardly from said first stage through a second permeable barrier to a second stage, said second permeable barrier defining said second stage below said first stage;
- propelling a second stream of oxygen-containing gas upwardly through said second stage in counter-current contact with said second stream of coked catalyst to combust coke from said second stream of coked catalyst to provide a third stream of coked catalyst including regenerated catalyst and said first stream of oxygen-containing gas including flue gas;
- propelling said first said stream of oxygen-containing gas through said second permeable barrier from said second stage to said first stage;
- and
- inhibiting upward movement of said second stream of coked catalyst in said second stage by said second permeable barrier.
6 more elements
Dependencies are inferred from the claim text.