Modeling of systems with aqueous solutions of UO2+2 salts. Asymmetric model of excess thermodynamic functions, based on virial expansion of the Gibbs free energy of the solution, VD-AS
Н. А. ЧарыковLeningrad Electrotechnical Institute—St. Petersburg State Electrotechnical University, ul. Prof. Popova 5, St. Petersburg, 197022, RussiaKonstantin N. SemenovSt. Petersburg State University, Universitetskaya nab. 7–9, St. Petersburg, 199034, RussiaA. V. KurilenkoSt. Petersburg State Institute of Technology (Technical University), Moskovskii pr. 26, St. Petersburg, 190013, RussiaВ. А. КескиновSt. Petersburg State Institute of Technology (Technical University), Moskovskii pr. 26, St. Petersburg, 190013, RussiaD. G. LetenkoSt. Petersburg State Architectural and Building University, 2-ya Krasnoarmeiskaya ul. 4, St. Petersburg, 190005, RussiaN. A. KulenovaSerikbaev East Kazakhstan State Technical University, ul. Protozanova 1, Ust-Kamenogorsk, 070000, KazakhstanAndrey ZolotarevSt. Petersburg State Institute of Technology (Technical University), Moskovskii pr. 26, St. Petersburg, 190013, RussiaV. V. KlepikovSt. Petersburg State Institute of Technology (Technical University), Moskovskii pr. 26, St. Petersburg, 190013, Russia
2017en
ABI
Аннотация
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.
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