Amino-functionalized task-specific ionic liquids are thought to have good application prospects in terms of CO2 fixation and separation
due to their strong CO2 absorption with selectivity under ambient conditions. In this study
four task-specific ionic liquids were synthesized
with their structures and properties characterized by IR
1H NMR. The performances of these four task-specific ionic liquids in terms of CO2 absorption and regeneration were investigated. It was found that these four task-specific ionic liquids are supervisor to traditional ionic liquids in terms of CO2 absorption. In addition
these four task-specific ionic liquids showed excellent regeneration performance
which indicated that they could be reused for CO2 absorption. The solubility of CO2 in ionic liquids was affected significantly by the viscosity
decreased by increasing the temperature
increased by increasing the pressure and absorbent concentration. Enhanced mass transfer can improve the regeneration efficiency. However
no significant effect on the absorption properties of ionic liquids was observed after multiple regenerations.