The solubility of carbon dioxide (CO2) in three different ionic liquids {1,2,3-Tris(diethylamino) cyclopropenylium dicyanamide, [TDC] [DCN]; ethyldimethylpropylammonium bis (trifluoro methyl sulfonyl)imide, [EMMP] [TF2N]; and 1,2,3-Tris(diethylamino)cyclopropenylium bis(trifluoro methane sulfonyl)imide, [TDC] [TF2N]} has been studied experimentally using a gravimetric microbalance. The CO2 + IL systems were studied at 313.15, 323.15 and 333.15 K and over a pressure range of 10.1-20 bar. The experimental density, Henry's law constant, entropy and the enthalpy of absorption for CO2 are also reported. The results obtained showed that CO2 solubility diminished in the following sequence: [TDC][TF2N] > [EMMP][TF2N]>[TDC][DCN]. It was found that [TDC][TF2N] shows comparable CO2 solubility to other well-known ionic liquids such as [hmim][TF2N], which makes it an attractive solvent for CO2 removal processes. The experimental solubility of CO2 in the three solvents were well correlated using the standard Peng-Robinson (PR) EoS, the Soave-Redlich-Kwong (SRK) EoS with quadratic mixing rules, and the Non-Random Two-Liquid (NRTL) model. (C) 2014 Elsevier B.V. All rights reserved.