Thermodynamic Model of the H2O-H2SO4-UO2SO4 System Incorporating Novel Experimental Data on Water Activity

被引：3

作者：

Maliutin, Aleksei S. ^{[1
]}

Kovalenko, Nikita A. ^{[1
]}

Nesterov, Aleksandr V. ^{[1
]}

Petrov, Vladimir G. ^{[1
]}

Uspenskaya, Irina A. ^{[1
]}

机构：

[1] Lomonosov Moscow State Univ, Dept Chem, Moscow 119991, Russia

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2023年 / 68卷 / 05期

关键词：

URANYL SULFATE-WATER; LIQUID-LIQUID IMMISCIBILITY; AQUEOUS SALT-SOLUTIONS; HIGH-TEMPERATURE; PHASE-EQUILIBRIA; SULFURIC-ACID; IONIC-SOLUTIONS; MULTICOMPONENT; PRESSURE; UO3-SO3-H2O;

D O I：

10.1021/acs.jced.3c00061

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Activity of water in aqueous solutions containing sulfuric acid and uranyl sulfate has been determined at 298.15, 310.65, and 323.15 K by means of the apparatus AQUALAB 4TE. The data obtained, along with literature information about activity of water and solid-liquid equilibria in the H2O-UO2SO4 and H2O-H2SO4- UO2SO4 systems, were used to develop a thermodynamic model of the ternary system mentioned. The resulting model, employing Pitzer-Simonson-Clegg (PSC) equations to represent the properties of a liquid phase, is valid within a wide range of temperatures and concentrations. Apart from introducing novel experimental data and a thermodynamic model, the reported study discusses advantages and disadvantages of the PSC-based thermodynamic descriptions of the H2O-H2SO4 subsystem presented in the literature.

引用

页码：1115 / 1122

页数：8

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