EQUATION-OF-STATE REPRESENTATION OF PHASE-EQUILIBRIA AND VOLUMETRIC PROPERTIES OF THE SYSTEM NACL-H2O ABOVE 573-K
EQUATION-OF-STATE REPRESENTATION OF PHASE-EQUILIBRIA AND VOLUMETRIC PROPERTIES OF THE SYSTEM NACL-H2O ABOVE 573-K
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DOI：
10.1016/0016-7037(93)90105-6
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发表时间：
1993-04-01
影响因子：
5
通讯作者：
PITZER, KS
中科院分区：
文献类型：
--
作者：
ANDERKO, A;PITZER, KS
建立了NaCl-H2O体系在高温高压下的综合状态方程。该方程由参考部分和摄动贡献组成。参考部分表示硬球离子对和偶极溶剂分子的混合物的性质。摄动部分来自所有其他相互作用，包括在第五个维里系数之后截断的维里型展开式。扰动部分的混合规则由维里系数的组成依赖性指导，并包含经验确定的非分子相互作用项。该方程适用于573-773 K范围内的大量实验数据和773 K以上的有限数据。在这两个温度区域，该方程基本上在实验不确定度范围内再现了固体NaCl的气液平衡、体积性质和溶解度。它适用于温度在573 K至约1200 K之间，压力高达5 kbar。
A comprehensive equation of state has been developed for the system NaCl-H2O at high temperatures and pressures. The equation consists of a reference part and a perturbation contribution. The reference part represents the properties of a mixture of hard-sphere ion pairs and dipolar solvent molecules. The perturbation part arises from all other interactions and comprises a virial-type expansion truncated after the fifth virial coefficient. Mixing rules for the perturbation part are guided by the composition dependence of virial coefficients and contain empirically determined terms for unlike-molecule interactions. The equation has been fitted to extensive experimental data in the temperature range 573-773 K and to more limited data above 773 K. In both temperature regions, the equation reproduces vapor-liquid equilibria, volumetric properties, and solubilities of solid NaCl essentially within experimental uncertainty. It is valid at temperatures between 573 K and ca. 1200 K and pressures up to 5 kbar.