Carbon capture system and method with exhaust gas recirculation

A system for separating carbon dioxide from an exhaust gas of a heat engine comprising:

• a. the heat engine configured to receive and consume a fuel stream so that the heat engine exhaust stream is produced;
• b. a cryogenic carbon capture system including:
• i) a flue gas cooling device in fluid communication with the heat engine and having a flue gas cooling device outlet, said flue gas cooling device configured to receive a fluid stream that is downstream from the heat engine and a cooled liquid coolant stream so that the fluid stream is cooled by the cooled liquid coolant stream and a cooled flue gas stream is formed, said cooled flue gas stream exiting the flue gas cooling device through the flue gas cooling device outlet;
• ii) a cryogenic carbon capture unit in fluid communication with the flue gas cooling device outlet and configured to receive at least a portion of the cooled flue gas stream and to separate carbon dioxide from the first portion of the cooled flue gas stream so that a clean flue gas stream and a carbon dioxide stream are formed;
• iii) a liquid coolant cooling device configured to receive the clean flue gas stream from the cryogenic carbon capture unit and a liquid coolant stream and to cool the liquid coolant stream using the clean flue gas stream so that the cooled liquid coolant stream is formed and provided to the flue gas cooling device;
• c. said heat engine in fluid communication with the cryogenic carbon capture system and configured to receive:
• i) a portion of a split stream that is downstream from the flue gas cooling device as an exhaust gas recirculation stream;
• and
• ii) an air stream.