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首页> 美国政府科技报告 >Prediction of Thermodynamic Properties, Including Solubility Equilibria and Vapor Pressures, for Mixed Aqueous Electrolytes to High Temperatures
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Prediction of Thermodynamic Properties, Including Solubility Equilibria and Vapor Pressures, for Mixed Aqueous Electrolytes to High Temperatures

机译：混合水电解质到高温的热力学性质预测，包括溶解度平衡和蒸汽压力

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A number of different models have been proposed in the literature that treat the thermodynamic properties of electrolyte solutions. The most frequently used at present is the ion-interaction or virial coefficient approach, which was initially developed by Pitzer (1973) and Pitzer and Kim (1974) for aqueous solutions near room temperature. Since the model is based on a general equation for the excess Gibbs energy of the aqueous fluid, any thermodynamic property can be obtained from the appropriate derivatives. Thus the model has been used to describe osmotic and activity coefficients, as well as volumetric and thermal properties (e.g., heat capacity and enthalpy) of aqueous electrolytes. Success of this model when applied to complex and concentrated electrolyte mixtures was initially demonstrated for calculations of equilibria at room temperature between a brine phase and one or more solids by Harvie and Weare (1980). In this study we show that the same success holds over a wider range of temperature conditions. The model is applied to calculations of solubility equilibria, as well as to calculations of vapor pressures of electrolyte mixtures to high temperatures. 32 refs., 8 figs., 2 tabs. (ERA citation 13:024832)

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