New experimental equilibrium data were obtained for the solubility of carbon dioxide in an aqueous solution with 30 wt.% of 2-((2-aminoethyl)amino)ethanol (AEEA) at temperatures ranging from (313.2 to 368.2) K and CO(2) partial pressures ranging from above atmospheric to 4400 kPa. A thermodynamic model based on the Deshmukh-Mather method was applied to correlate and predict the CO(2) solubility in aqueous AEEA solutions. The binary interaction parameters and equilibrium constants for the proposed reactions were determined by data regression. Using the adjusted parameters, equilibrium partial pressures of CO(2) were calculated and compared with the corresponding experimental values at the selected temperatures and pressures. Values of carbon dioxide solubility at other temperatures reported in the literature were also calculated. The average absolute deviation for all of the data points was found to be 8.2%. The enthalpy change of the absorption of CO(2) in the 30 wt.% aqueous solution of AEEA was also estimated with our model. (C) 2011 Elsevier Ltd. All rights reserved.