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US 12,097,464 B2Granted
Amine CO2 separation process integrated with hydrocarbons processing
AssigneeExxonMobil Chemical Patents Inc.
InventorsDavid Spicer, James L. Kendall, Steven M. Slack
Life of this patent
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Abstract
An exhaust steam stream having an absolute pressure from 200 kPa to 1,050 kPa and shaft power are produced from an extraction turbine and/or a back-pressure turbine. The exhaust steam stream can be supplied to an amine regenerator of an amine CO2 separation process. The shaft power can be utilized to drive equipment in a hydrocarbon processing plant such as an olefins production plant.
Claims25
A process comprising:
- (i) obtaining an exhaust steam stream having an absolute pressure from 200 kPa to 1,050 kPa and shaft power from one or more extraction turbine(s) and/or back-pressure turbine(s), wherein the one or more extraction turbine(s) and/or back-pressure turbine(s) is located in an olefins production plant, and the shaft power drives a device located in the olefins production plant;
- (ii) providing a gas mixture stream comprising CO2;
- (iii) feeding the gas mixture stream and a lean-amine stream comprising an amine into an absorption column;
- (iv) obtaining a CO2-rich amine stream and a CO2-depleted residual gas stream from the absorption column;
- (v) feeding at least a portion of the CO2-rich amine stream into a separation column;
- (vi) heating the at least a portion of the CO2-rich amine stream in the separation column using the exhaust steam stream to produce a stream rich in CO2 and a stream rich in the amine;
- and
- (vii) recycling at least a portion of the stream rich in CO2 to the absorption column as at least a portion of the lean-amine stream.
5 more elements
A process comprising:
- (i) obtaining an exhaust steam stream having an absolute pressure from 200 kPa to 1,050 kPa exhausted from one or more extraction turbine(s) and/or back-pressure turbine(s) located in an olefins production plant, wherein the extraction turbine(s) and/or back-pressure turbine(s) drives one or more of the following:
- a process-gas compressor;
- a refrigeration compressor;
- and combinations thereof;
- (ii) providing a gas mixture stream comprising CO2;
- (iii) feeding the gas mixture stream and a lean-amine stream comprising an amine into an absorption column;
- (iv) obtaining a CO2-rich amine stream and a CO2-depleted residual gas stream from the absorption column;
- (v) feeding at least a portion of the CO2-rich amine stream into a separation column;
- (vi) heating the at least a portion of the CO2-rich amine stream in the separation column using the exhaust steam stream to produce an overhead stream rich in CO2 and a bottoms stream rich in the amine;
- and
- (vii) recycling at least a portion of the bottoms stream to the absorption column as at least a portion of the lean-amine stream.
8 more elements
Dependencies are inferred from the claim text.