Estimation of the CO2Absorption Capacities in Aqueous 2-(2-Aminoethylamino)ethanol and Its Blends with MDEA and TEA in the Presence of SO2

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A study of carbon dioxide (CO 2 ) and sulfur dioxide (SO 2 )/CO 2 mixtures absorption has been carried out in aqueous 2-(2-aminoethylamino)ethanol (AEE) solution and its blends with N -methyldiethanolamine (MDEA) and triethanolamine (TEA) to estimate the influence of SO 2, MDEA, and TEA on the CO 2 absorption capacity of the AEE. The CO 2 absorption loading has been estimated in 15 wt % AEE alone and in the presence of either 5 and 10 wt % MDEA or 5 and 10 wt % TEA solutions with 100 vol % CO 2 and 5.03 and 15.02 vol % SO 2 /CO 2 mixtures at a starting temperature of 296 K and flow rates of 3.067, 3.229, and 3.605 L/min, respectively. The results revealed that the presence of SO 2 in the gas decreases the CO 2 absorption rate and loading in the AEE solution as a function of the concentration of SO 2 . The additions of 5 and 10 wt % of MDEA and TEA do not seem to influence the CO 2 absorption rate in the AEE solution. Moreover, the addition of MDEA increases slightly the CO 2 absorption capacity of AEE, while TEA decreases the absorption capacity of AEE in the absence and presence of SO 2 . These effects were enhanced with increases of MDEA and TEA. Altogether, the results indicated that the blend of 15 wt % AEE + 10 wt % MDEA represents an interesting solvent which could be used as absorbent for the removal of CO 2 from emission into the atmosphere by industries.