Two ionic liquids (ILs) namely bis(2-hydroxyethyl)ammonium acetate (bheea) and 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) were mixed with water/aqueous solutions of monoethanolamine to form new hybrid solvents for the absorption of CO2. The uptake of CO2 in the aqueous mixtures of ILs + MEA were determined for a wide range of compositions at pressures between 100 and 1600 kPa and at three different temperatures (298.15, 303.15 and 313.15 K). For the case of aqueous (bheea) + MEA system, MEA acts as a supporting solvent whereas in the other case, ([bmim][BF4]) will acts as a supporting solvent for CO2 capture. The effect of pressure and temperature on CO2 loading for the aqueous solutions of bheea + MEA and ([bmim][BF4]) + MEA are discussed in detail. (C) 2011 Published by Elsevier B.V.