Modeling Viscosity of Multicomponent Electrolyte Solutions
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- 作者：M. M. Lencka ; A. Anderko ; S. J. Sanders and R. D. Young
- 关键词：viscosity ; aqueous solutions ; electrolytes
- 刊名：International Journal of Thermophysics
- 出版时间：1998
- 出版年：1998
- 期刊代码：33_0195928X
- 类别：ch
- 卷：19
- 期：2
- 页码：367-378
- 数据来源：sp
摘要
A comprehensive model for calculating the viscosity of aqueous electrolyte solutions has been developed. The model includes a long-range electrostatic interaction term, contributions of individual ions, and a contribution of specific interactions between ions or neutral species. The long-range electrostatic term is obtained from the Onsager–Fuoss theory, whereas the individual ionic contributions are calculated using the Jones–Dole B coefficients. A technique for predicting the temperature dependence of the B coefficients has been developed on the basis of the concept of structure-breaking and structure-making ions. The contribution of specific interactions between species, which is dominant for concentrated solutions, has been found to be a function of the ionic strength. The model reproduces the viscosity of aqueous systems ranging from dilute to concentrated solutions (up to ca. 30m) at temperatures up to 573 K with an accuracy that is appropriate for modeling industrially important systems. In particular, the viscosity of multicomponent systems can be accurately predicted using parameters obtained from single-solute systems.