System and method for introducing an additive into a coking process to improve quality and yields of coker products
First Claim
1. A process comprising introducing by pressurized injection an additive comprising cracking catalyst(s) and quenching agent(s), alone or in combination with seeding agent(s), excess reactant(s), carrier fluid(s), or any combination thereof into vapors in a coking vessel of a delayed coking process during a coking cycle wherein said quenching agent(s) condense a vapor of a highest boiling point compound to facilitate contact with components of said catalyst.
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Abstract
Heavy gas oil components, coking process recycle, and heavier hydrocarbons in the delayed coking process are cracked in the coking vessel by injecting a catalytic additive into the vapors above the gas/liquid-solid interface in the coke drum during the coking cycle. The additive comprises cracking catalyst(s) and quenching agent(s), alone or in combination with seeding agent(s), excess reactant(s), carrier fluid(s), or any combination thereof to modify reaction kinetics to preferentially crack these components. The quenching effect of the additive can be effectively used to condense the highest boiling point compounds of the traditional recycle onto the catalyst(s), thereby focusing the catalyst exposure to these target reactants. Exemplary embodiments of the present invention can also provide methods to (1) reduce coke production, (2) reduce fuel gas production, and (3) increase liquids production.
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Citations
17 Claims
- 1. A process comprising introducing by pressurized injection an additive comprising cracking catalyst(s) and quenching agent(s), alone or in combination with seeding agent(s), excess reactant(s), carrier fluid(s), or any combination thereof into vapors in a coking vessel of a delayed coking process during a coking cycle wherein said quenching agent(s) condense a vapor of a highest boiling point compound to facilitate contact with components of said catalyst.
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17. A process comprising introducing an additive by pressurized injection into vapors in a coking vessel of a delayed coking process during a coking cycle to condense a vapor of a highest boiling point compound to facilitate contact with components of said additive;
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wherein said additive comprises cracking catalyst(s) and quenching agent(s), alone or in combination with seeding agent(s), excess reactant(s), carrier fluid(s), or any combination thereof; and wherein said contact of said highest boiling point compound of said vapors in said coking vessel with said cracking catalyst(s), alone or in combination with said seeding agent(s), said excess reactant(s), or any combination thereof of said additive creates selective conversion of said highest boiling point compound of said vapors in said coking vessel.
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Specification