New anhydrous CO2 absorbents were prepared with: tetramethylammonium glycinate ([N1111][Gly]), a task specific ionic liquid (TSIL), and dimethyaminoethoxyethanol (DMEE). The absorption of CO2 was studied over a wide range of IL concentration (5–60wt%), temperature (298–318K) and CO2 pressure (0–300kPa). The addition of DMEE was found to be able to greatly accelerate the CO2 absorption as well as increase CO2 loading in [N1111][Gly] since it reduced the fluid viscosity as well as acted as a proton acceptor. CO2 reacted with IL and precipitated and can be removed from the system and subsequently regenerated by heat. The regeneration efficiencies of the solutions at 353K are higher than 97% and decrease very little in the next absorption circles. The anhydrous CO2 absorbents showed an advantage of a higher regeneration efficiency at relatively lower temperature and less energy consumption than aqueous solutions of alkanolamines.