System and methods for CO2 separation

A method of separating carbon dioxide (CO2) from a gas stream, comprising:

• contacting a liquid sorbent stream with the gas stream in a reaction chamber;
• reacting at least a portion of CO2 in the gas stream with the liquid sorbent stream to form an adduct stream comprising a solid CO2 adduct;
• contacting the adduct stream with a pressurized CO2 stream, thereby liquefying at least a portion of the solid CO2 adduct and forming a pressurized adduct stream comprising a liquid CO2 adduct;
• pre-heating the pressurized adduct stream via heat exchange with a regenerated liquid sorbent stream to form a pre-heated pressurized adduct stream and a cooled regenerated liquid sorbent stream;
• heating the pre-heated pressurized adduct stream to decompose at least a portion of the liquid CO2 adduct to form a CO2 stream and the regenerated liquid sorbent stream;
• pressurizing at least a portion of the CO2 stream to form the pressurized CO2 stream and recirculating the pressurized CO2 stream for contacting with the adduct stream;
• and
• recirculating at least a portion of the cooled regenerated liquid sorbent stream to the reaction chamber.