Studies on CO2 solubility in N-Methyldiethanolamine and hydrophobic ionic liquid binary mixtures

A fundamental and systematic investigation on the potential application of hybrid mixtures {comprising of ionic liquid (IL) + MDEA} for CO2 removal has been presented. The binary mixtures of three imidazolium based ILs namely; 1-hexyl-3-methylimidazolium tetrafluoroborate ([hmim][BF4]), 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([hmim][Tf2N]), 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate ([hmim][FAP]) with N-methyldiethanolamine (MDEA) were prepared and the CO2 solubility was measured in the pure solvents as well as in the binary mixtures at three temperatures (298.15, 313.15, 323.15) K and at eight different pressures (≤ 3000 kPa).