Abstract: A new equation of state for electrolyte solutions is presented based on perturbation theory. Molecule-molecule, ion-molecule and ion-ion interactions are incorporated into the equation of state. The equation covers the entire fluid density range from zero to liquid-like densities. Therefore, it can be used for both phases in vapor-liquid equilibrium calculations.For mixtures without elec-trolytes the equation resembles the equation developed by Hu et al. (1984). The equation was used to correlate the vapor-liquid equilibrium for ammonia-carbon dioxide-water system with fewer parameters than other existing models. Satisfactory results were obtained, and they were equivalent to, or better than those from other models.

摘要： 本文以扰动理论为基础建立了一个新的电解质溶液的状态方程.该方程考虑了分子—分子、分子—离子及离子—离子的二元交互作用,并被用来关联弱电解质体系NH_3-CO_2-H_2O的汽液平衡.该方程只有三个二元交互作用参数,其中两个是可调参数,比其他模型的参数少得多,而关联结果则与其他模型相仿,关联误差在实验误差的范围之内.取得了令人满意的结果.