Journal of Chemical and Engineering Data, Vol.57, No.11, 3203-3209, 2012
Solubility of CO2 in Aqueous Blends of (N-Methyl-2-ethanolamine plus N-Methyl-diethanolamine) and (N-Methyl-2-ethanolamine+2-Amino-2-methyl-1-propanol)
This work presents experimental data on CO2 solubility in aqueous blends of N-methyl-2-ethanolamine (MAE) + N-methyl-diethanolamine (MDEA) and N-raethyl-2-ethanolamine (MAE) + 2-amino-2-methyl-1-propanol (AMP) at temperatures (303.1, 313.1, and 323.1) K and CO2 pressure in the range of (1 to 545) kPa. Aqueous ternary mixtures of (MAE + MDEA) and (MAE + AMP) with the folic wing compositions (0.03 mass fraction/0.399 mol.L-1 MAE + 0.27 mass fraction/2.266 mol.L-1 MDEA), (0.06 mass fraction/0.799 mol.L-1 MAE + 0.24 mass fraction/2.014 mol-L-1 MDEA), (0.09 mass fraction/1.198 mol.L-1 MAE + 0.21 mass fraction/1.762 mol.L-1 MDEA), (0.12 mass fraction/1.598 mol.L-1 MAE + 0.18 mass fraction/1.511 mol.L-1 MDEA), (0.15 mass fraction/1.997 mol.L-1 MAE + 0.15 mass fraction/1.259 mol.L-1 MDEA), (0.21 mass fraction/2.796 mol.L-1 MAE. + 0.09 mass fraction/0.755 mol.L-1 MDEA), and (0.24 mass fraction/3.195 mol.L-1 MAE + 0.06 mass fraction/0.503 mol.L-1 MDEA) and (0.03 mass fraction/0.399 mol.L-1 MAE + 0.27 mass fraction/3.029 mol.L-1 AMP), (0.06 mass fraction/0.799 mol.L-1 MAE + 0.24 mass fraction/2.692 mol.L-1 AMP), (0.09 mass fraction/1.198 mon(-1) MAE + 0.21 mass fraction/2.356 mol.L-1 AMP), (0.12 mass fraction/1.598 mol.L-1 MAE + 0.18 mass fraction/2.019 mol.L-1 AMP), (0.15 mass fraction/1.997 mol.L-1 MAE + 0.15 mass fraction 1.682 mol.L-1 AMP), (0.21 mass fraction/2.796 mol.L-1 MA.E + 0.09 mass fraction/1.009 mol.L-1 AMP), and (0.24 mass fraction/3.195 mol.L-1 MAE + 0.06 mass fraction/0.673 mol.L-1 AMP) were considered to identify suitable blends having maximum CO2 absorption capacity. The suitability of aqueous (MAE + MDEA/AMP) in comparison to aqueous (DEA + MDEA/AMP) blend was explored. The total alkanolamine mass fractions in the blends were held constant at 0.30.