Systems and methods for regenerating a spent catalyst
AssigneeKellogg Brown & Root LLC
InventorsPhillip K. Niccum, Alan M. Claude, Robert B. Peterson
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Abstract
Systems and methods for regenerating a spent catalyst are provided. The method can include mixing a spent catalyst with a carrier fluid to provide a mixture. The spent catalyst can include carbon deposited on at least a portion thereof. The carrier fluid can include an oxygen containing gas. The mixture can be introduced to or above an upper surface of a dense phase catalyst zone disposed within a regenerator. A gas can be introduced to a lower zone of the dense phase catalyst zone. At least a portion of the carbon deposited on the catalyst can be combusted to provide a flue gas, heat, and a regenerated catalyst.
Claims34
A method for regenerating a spent catalyst, comprising:
- mixing a spent catalyst with a carrier fluid to provide a mixture, wherein the spent catalyst includes carbon deposited on at least a portion thereof, and wherein the carrier fluid comprises an oxygen containing gas;
- introducing the mixture to a dilute phase catalyst zone disposed within a regenerator;
- distributing the mixture of the dilute phase catalyst zone onto an upper surface of a dense phase catalyst zone disposed within the regenerator;
- introducing a gas to a lower zone of the dense phase catalyst zone;
- and
- combusting at least a portion of the carbon deposited on the catalyst to provide a flue gas, heat, and a regenerated catalyst.
A method for regenerating a spent catalyst, comprising:
- mixing a spent catalyst with a carrier fluid to provide a mixture, wherein the spent catalyst includes carbon deposited on at least a portion thereof;
- introducing the mixture to a dilute phase catalyst zone disposed above a dense phase catalyst zone in a regenerator;
- distributing the mixture of the dilute phase catalyst zone onto an upper surface of the dense phase catalyst zone;
- introducing a gas to a lower portion of the dense phase catalyst zone;
- combusting at least a portion of the carbon deposited on the spent catalyst to provide a flue gas, heat, and a regenerated catalyst;
- introducing at least a portion of the regenerated catalyst to a fluidized catalytic cracker;
- and
- recovering the flue gas from the regenerator, wherein the flue gas comprises less than about 150 ppm nitrogen oxides.
A method for regenerating a spent catalyst, comprising:
- mixing a spent catalyst with a carrier fluid to provide a dilute phase mixture, wherein the spent catalyst includes carbon deposited on at least a portion thereof;
- introducing the dilute phase mixture to a dilute phase catalyst zone disposed above a dense phase catalyst zone in a regenerator;
- distributing the dilute phase mixture of the dilute phase catalyst zone onto an upper surface of the dense phase catalyst zone;
- introducing a gas to the lower zone;
- introducing an oxygen containing gas to the dilute phase catalyst zone;
- and
- combusting at least a portion of the carbon deposited on the catalyst to provide a flue gas, heat, and a regenerated catalyst.
Dependencies are inferred from the claim text.