Experimental Determination and Prediction of Gas Solubility Data for CO₂ + H₂O Mixtures Containing NaCl or KCl at Temperatures between 313 and 393 K and Pressures up to 10 MPa

Abstract

Gas solubility data of carbon dioxide (CO 2 ) in water (H 2 O) and aqueous sodium or potassium chloride (NaCl, KCl) solutions were measured by means of the static synthetic method in a temperature range from 313 to 393 K and pressures up to 10 MPa. The experimental data were compared to the results of other authors and to calculated values using an equation of state (EoS) approach. The calculations were enabled by the combination of the PSRK group contribution EoS with the LIFAC method for the prediction of vapor−liquid-phase equilibria containing strong electrolytes. The required interaction parameters were fitted to experimental data from this work and from the literature.