CO2 SEPARATION & LIQUEFACTION SYSTEM AND METHOD

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. 本发明公开了诸如可用于化石燃料燃烧发电厂的碳捕捉和封存系统的CO2分离和液化系统。所述CO2分离和液化系统包括：用液态CO2冷却烟道气的第一冷却级；与第一冷却级耦连以压缩冷却的烟道气的压缩级；第二冷却级，其与所述压缩级和所述第一冷却级耦连以用CO2熔化来冷却经压缩的烟道气并将液态CO2提供给第一冷却级；和膨胀级，其与所述第二冷却级耦连以从烟道气提取固态CO2，该固态CO2在第二冷却级熔化以提供液态CO2。