A sort of functional hydrophilic ionic liquid (ILs)

[NH2-C3mim][Br]

was prepared by the green synthesis route.Aiming at reduction of operational costs for CO2 absorption and regeneration and reuse of absorbent

experiments on CO2 capture and absorbent-desorption for regeneration and reuse were carried out.Experimental results showed that specific capacity of CO2 (on the basis of complex absorbent or ILs component) changed with the concentration of ILs in the complex absorbent.In the initial stage

CO2 absorption rates changed obviously with the concentration of ILs

and an appropriate ratio of complex absorbent was obtained(mass ratio of ILs to water was 1.38:1).Moreover

continuous CO2 capture and absorbent regeneration experiments were carried out with a pilot scale equipment for absorption enhanced by super gravity field and desorption via counter-current contact under vacuum or by heating with water-based ionic liquid solution

improved hot potassium carbonate and activated complex alcamines as absorbent respectively.The results indicated good absorption for CO2 capture with water-based ionic liquid solution

improved hot potassium carbonate and activated complex alcamines under super gravity field

and the absorption rates for CO2 were 98%

96% and 90% respectively.Adsorbent could be regenerated and reused after CO2 removal under vacuum or by heating.Water-based ionic liquid solution desorption under vacuum and at normal temperature was more practicable.