Abstract
A novel approach is proposed for modeling vapor-liquid equilibria in systems containing aqueous NaCl and supercritical gases. The Peng-Robinson equation of state is used for all species, with the salt treated as a hypothetical liquid component. To correctly model the highly non-ideal liquid solution, a two-fluid model is used for the mixing rules in the equation of state. Effective pure-component parameters are reported for NaCl as well as binary interaction parameters for all possible binaries. Representation of high-pressure phase equilibria data show good agreement with experimental data. The principal advantage of this approach is the ability to treat high pressure systems containing non-volatile salts, while maintaining the simplicity of a cubic equation of state.
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Kwak, C., Anderson, T.F. Application of peng-Robinson equation to high-pressure aqueous systems containing gases and sodium chloride. Korean J. Chem. Eng. 8, 88–94 (1991). https://doi.org/10.1007/BF02697382
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DOI: https://doi.org/10.1007/BF02697382