Co2 separation & liquefaction system and method

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.

Description

[0001] Cross References to Related Applications [0002] This application is a non-provisional application of, and claims priority to, U.S. Provisional Patent Application No. 62 / 825,947, filed March 29, 2019, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] Embodiments of the present invention relate to CO 2 separation and liquefaction, and more particularly to CO 2 capture technology using exhaust gas as a refrigerant to liquefy CO 2 and separate CO 2 from exhaust gas. Background technique [0004] The scientific community generally agrees that global climate change, or global warming, is the result of CO2 emissions from human activities. The main source of CO2 emissions is the burning of fossil fuels for energy production. To slow the rise in global temperatures, society must reduce the amount of CO2 emitted into the atmosphere as our demand for energy increases. One way to reduce CO2 emissions is to capture the CO2 th...

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Problems solved by technology

This means that very small leaks in the R-14 refrigerant circuit can significantly reduce the effectiveness of the system in capturing CO2

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