SOLUBILITY OF CARBON-DIOXIDE AND HYDROGEN-SULFIDE IN AQUEOUS ALKANOLAMINES

The Deshmukh-Mather thermodynamic model has been fitted to all availab le, public, phase-equilibrium data for CO2 and H2S in aqueous solution s of monoethanolamine, diethanolamine, diglycolamine, and N-methyldiet hanolamine. The fitting was done for both acid gases simultaneously, a nd the best numerical values of the most important interaction paramet ers for each amine were obtained. Although the method used for data re gression did not provide a statistical measure of the goodness of fit, the regressed model forms a unified basis for evaluating the large am ount of data collected over the past 50 years and it results in a rati onal approach to performing vapor-liquid equilibrium calculations in a computationally affordable, thermodynamically sound manner.