화학공학소재연구정보센터
Industrial & Engineering Chemistry Research, Vol.46, No.26, 8968-8971, 2007
Estimation of the CO2 absorption capacities in aqueous 2-(2-aminoethylamino)ethanol and its blends with MDEA and TEA in the presence of SO2
A study of carbon dioxide (CO2) and sulfur dioxide (SO2)/CO2 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 SO2, MDEA, and TEA on the CO2 absorption capacity of the AEE. The CO2 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 % CO2 and 5.03 and 15.02 vol % SO2/CO2 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 SO2 in the gas decreases the CO2 absorption rate and loading in the AEE solution as a function of the concentration Of SO2. The additions of 5 and 10 wt % of MDEA and TEA do not seem to influence the CO2 absorption rate in the AEE solution. Moreover, the addition of MDEA increases slightly the CO2 absorption capacity of AEE, while TEA decreases the absorption capacity of AEE in the absence and presence Of SO2. 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 CO2 from emission into the atmosphere by industries.