Experimental Determination and Prediction of Gas Solubility Data for CO2 + H2O Mixtures Containing NaNO3 or KNO3

In a continuation of earlier investigations, gas solubility data of carbon dioxide (CO 2 ) in aqueous sodium and potassium nitrate solutions (NaNO 3, KNO 3 ) were measured using the static synthetic method in a temperature range from 313 to 373 K, for pressures up to 10 MPa and molalities up to 10 mol·kg -1 . Additionally, Henry coefficients were derived from these experimental P − x data, and the experimental data were used to fit interaction parameters for an equation of state approach, which consists of a combination of the predictive Soave−Redlich−Kwong (PSRK) group contribution equation of state and the LIFAC method for the prediction of vapor−liquid equilibria in systems with strong electrolytes.