Modeling of systems with aqueous solutions of UO 2  2+  salts. Asymmetric model of excess thermodynamic functions, based on virial expansion of the Gibbs free energy of the solution, VD-AS

N. A. Charykov; K. N. Semenov; A. V. Kurilenko; V. A. Keskinov; D. G. Letenko; N. A. Kulenova; A. A. Zolotarev; V. V. Klepikov

doi:10.1134/S1066362217020059

Modeling of systems with aqueous solutions of UO₂²⁺ salts. Asymmetric model of excess thermodynamic functions, based on virial expansion of the Gibbs free energy of the solution, VD-AS

Authors: Charykov N.A.¹^,2, Semenov K.N.³, Kurilenko A.V.¹, Keskinov V.A.¹, Letenko D.G.⁴, Kulenova N.A.⁵, Zolotarev A.A.¹, Klepikov V.V.¹
Affiliations:
1. St. Petersburg State Institute of Technology (Technical University)
2. Leningrad Electrotechnical Institute—St. Petersburg State Electrotechnical University
3. St. Petersburg State University
4. St. Petersburg State Architectural and Building University
5. Serikbaev East Kazakhstan State Technical University
Issue: Vol 59, No 2 (2017)
Pages: 134-142
Section: Article
URL: https://journals.rcsi.science/1066-3622/article/view/223794
DOI: https://doi.org/10.1134/S1066362217020059
ID: 223794

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Abstract

An asymmetric model of virial expansion of the Gibbs free energy of solution, VD-AS, was suggested. Partial and molar thermodynamic functions of UO₂(ClO₄)₂–H₂O, UO₂Cl₂–H₂O, and UO₂(NO₃)₂–H₂O binary solutions at 25°C were calculated using this model. The calculations show that the solutions are characterized by different, sometimes extremely large, deviations from ideality. The suggested model is considerably more accurate and stable than the most widely used Pitzer’s model of electrolyte solutions.

Keywords

semiempirical thermodynamic model, electrolyte solutions, uranyl perchlorate, uranyl chloride, uranyl nitrate, activity coefficients, asymmetric normalization

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Modeling of systems with aqueous solutions of UO22+ salts. Asymmetric model of excess thermodynamic functions, based on virial expansion of the Gibbs free energy of the solution, VD-AS

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Modeling of systems with aqueous solutions of UO₂²⁺ salts. Asymmetric model of excess thermodynamic functions, based on virial expansion of the Gibbs free energy of the solution, VD-AS