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A. S. Maliutin, N. A. Kovalenko, I. A. Uspenskaya
Thermodynamic properties and phase
equilibria in the H2O – HNO3 – UO2(NO3)2
system
Abstract
A set of Pitzer interaction parameters is
proposed to describe the thermodynamic properties of the H2O – UO2(NO3)2
– HNO3 solution. This set is reliable at temperatures varying from
15 to 50 °C in concentration range of 0 to 40m HNO3 and 0 to 8m UO2(NO3)2.
To evaluate these parameters, the following experimental data were used: vapor
pressures of the volatile components, dissociation fraction of HNO3,
and data on solid–liquid equilibria.
Key words: thermodynamic modeling, Pitzer
model, nitric acid, uranyl nitrate, thermodynamic properties, vapor-liquid
equilibria, solid–liquid equilibria.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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