Thermodynamic modeling of MAPA-H2O-CO2 system for CO2 capture

Chemical absorption is one of the most mature processes for carbon capture at industrial scale. Nevertheless, this technology still involves a high energy consumption for the solvent regeneration. To lower this energy consumption, biphasic solvents such as a mixture of a tertiary amine N,N-diethylaminoethanol (DEEA) and a diamine N-methyl-1,3-propanediamine are investigated. This work focuses on the thermodynamic modeling of MAPA system. The electrolyte non-random two-liquid theory (e-NRTL) was used to model the total pressure and the partial pressures of CO2 in MAPA aqueous mixtures. Models for the density and the viscosity are also presented.