Co2 separation & liquefaction system and method
AssigneeCarbon Capture America, Inc.
InventorsMiles L. Abarr, Scott Raymond Frazier
Life of this patent
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Abstract
A CO2 separation and liquefaction system such as might be used in a carbon capture and sequestration system for a fossil fuel burning power plant is disclosed. The CO2 separation and liquefaction system includes a first cooling stage to cool flue gas with liquid CO2, a compression stage coupled to the first cooling stage to compress the cooled flue gas, a second cooling stage coupled to the compression stage and the first cooling stage to cool the compressed flue gas with a CO2 melt and provide the liquid CO2 to the first cooling stage, and an expansion stage coupled to the second cooling stage to extract solid CO2 from the flue gas that melts in the second cooling stage to provide the liquid CO2.
Claims23
A CO2 separation and liquefaction system comprising:
- a first cooling stage to cool flue gas with liquid CO2;
- a compression stage coupled to the first cooling stage to compress the cooled flue gas;
- a second cooling stage coupled to the compression stage and the first cooling stage to cool the compressed flue gas with a CO2 melt and provide the liquid CO2 to the first cooling stage;
- and
- an expansion stage coupled to the second cooling stage to extract solid CO2 from the flue gas that melts in the second cooling stage to provide the liquid CO2.
A carbon capture and sequestration (CCS) system comprising:
- a first cooling stage to cool a flue gas with CO2 to be sequestered;
- a compression stage coupled to the first cooling stage to compress the cooled flue gas;
- a second cooling stage coupled to the compression stage to cool the compressed flue gas with solid CO2;
- and
- an expander coupled to the second cooling stage to extract solid CO2 from the flue gas, the expander coupled to the first cooling stage and the second cooling stage to provide the solid CO2 and the CO2 to be sequestered.
A method of operating a CO2 liquefaction system comprising the steps of:
- extracting flue gas from a flue gas producer;
- compressing the flue gas in a first compressor;
- cooling the flue gas in a heat exchanger cooled by the ambient environment;
- cooling a first stream of the flue gas from the heat exchanger using liquid CO2;
- compressing the flue gas in a second compressor;
- cooling the flue gas by melting solid CO2 and producing the liquid CO2;
- and
- expanding the flue gas in an expansion stage to extract the solid CO2.
A carbon capture and sequestration (CCS) system for a power plant comprising:
- a first compressor to compress air;
- a first heat exchanger coupled to the first compressor to cool the compressed air, the first heat exchanger cooled by an ambient environment;
- a first cooling stage coupled to the power plant to receive flue gas and coupled to the first heat exchanger to receive the air, the first cooling stage cooling the flue gas and the air with liquid CO2;
- a second compressor coupled to the first cooling stage to receive and compress the air;
- a second cooling stage coupled to the second compressor to receive and cool the air, the second cooling stage coupled to the first cooling stage to cool and extract CO2 from the flue gas and provide the liquid CO2;
- and
- an expansion stage coupled to the second cooling stage to expand the air and provide the expanded air to the second cooling stage to cool the flue gas.
Dependencies are inferred from the claim text.