SOLUBILITIES OF CARBON-DIOXIDE IN WATER PLUS MONOETHANOLAMINE PLUS 2-AMINO-2-METHYL-1-PROPANOL

The solubilities of carbon dioxide in water (1) + monoethanolamine (2) + 2-amino-2-methyl-1-propanol (3) have been measured at 40, 60, 80, and 100-degrees-C and at Partial pressures of carbon dioxide ranging from 1.0 to 200 kPa. The ternary mixtures studied were w2 = 0, w3 = 0.3; w2 = 0.06, w3 = 0.24; w2 = 0.12, w3 = 0.18; w2 = 0.18, w3 = 0.12; and w2 = 0.24, w3 = 0.06 where w is the mass fraction. The modified Kent and Eisenberg model has been used to represent the solubility Of CO2 in the ternary solutions. The model reasonably reproduces the equilibrium partial pressure Of CO2 above the ternary solutions, not only over a temperature range from 40 to 100-degrees-C, but also for various concentrations of components in the ternary solutions.