Absorption and stripping of CO₂ with a molten salt slurry in a bubble column at high temperature

A novel slurry bubble column in which a lithium silicate as a CO₂ absorbent is suspended in a molten salt at high temperature was proposed. To confirm the feasibility of the proposed system, the effects of the CO₂ feed rate into the slurry bubble column, the quantity of absorbent, and the suspension concentration on the performance of the CO₂ recovery were investigated. The proposed system could rapidly absorb and strip CO₂ by thermal swinging. Moreover, no reduction of the CO₂ recovery performance by the repeated use of the absorbent was observed.