Methods and systems for CO2 separation

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

• (i) contacting a first liquid sorbent stream comprising a plurality of liquid sorbent particles with the gas stream in a reaction chamber;
• (ii) reacting at least a portion of CO2 in the gas stream with the plurality of liquid sorbent particles to form a plurality of solid adduct particles, wherein the solid adduct particles are entrained in the gas stream to form an entrained gas stream;
• (iii) transferring the entrained gas stream from the reaction chamber to a separation unit via an outlet located in a lower region of the reaction chamber relative to an inlet for the first liquid sorbent stream;
• (iv) contacting the entrained gas stream with a second liquid sorbent stream in the separation unit, thereby separating at least a portion of the plurality of solid adduct particles from the entrained gas stream to form an adduct stream and a CO2-lean gas stream;
• (v) contacting the adduct stream with a third liquid sorbent stream in a suspension unit to form a slurry, and transporting the slurry to a desorption unit;
• (vi) heating at least a portion of the slurry to form a CO2 stream and a regenerated liquid sorbent stream;
• and
• (vii) circulating at least a portion of the regenerated liquid sorbent stream to the separation unit.