Thermodynamics of Acid Gas−MDEA−Water Systems

A thermodynamic framework for representing chemical and vapor−liquid equilibria in acid gas−MDEA−water systems has been developed. The vapor−liquid equilibrium is calculated through a new EoS/ G E model called the electrolyte-LCVM model. Model parameters either are taken from the literature (when they are available) or are determined in this work through the regression of binary and ternary vapor−liquid equilibrium data. Accurate predictions are obtained with the new model over a wide range of temperatures, pressures, MDEA concentrations, and loadings.