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A Simple Two-Parameter Correlation Model for Aqueous Electrolyte Solutions across a Wide Range of Temperatures
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Process Science.
2009 (English)In: Journal of Chemical and Engineering Data, ISSN 0021-9568, E-ISSN 1520-5134, Vol. 54, no 2, 179-186 p.Article in journal (Refereed) Published
Abstract [en]

In this paper, we focused on the correlation of the thermodynamic properties of aqueous solutions across a temperature range from (273.15 to 523.15) K by a simple two-parameter model. This model is based on the modified three-characteristic-parameter correlation (TCPC) model. The two parameters, b, distance of closest approach, and S, solvation parameter, represent the interactions between ions and ions-molecules, respectively. The results show that it can adequately correlate the activity coefficient and osmotic coefficient of the single electrolyte solutions. The set of two characteristic parameters for many electrolytes was obtained. We also obtained the temperature-dependent parameters for these electrolytes. In over 70 % of the cases, six to eight parameters are necessary for an electrolyte. Compared with the Pitzer model, our model also represented a good performance.

Place, publisher, year, edition, pages
2009. Vol. 54, no 2, 179-186 p.
National Category
Chemical Sciences
URN: urn:nbn:se:kth:diva-32336DOI: 10.1021/je800483qISI: 000263371000003ScopusID: 2-s2.0-65249149513OAI: diva2:410074
QC 20110411Available from: 2011-04-12 Created: 2011-04-12 Last updated: 2011-04-12Bibliographically approved

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Ge, Xinlei
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