Journal
JOURNAL OF CHEMICAL THERMODYNAMICS
Volume 152, Issue -, Pages -Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jct.2020.106260
Keywords
Potentiometric titration; Molten salt; Cerium trichloride; Thermodynamics; Pourbaix diagram
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The study investigated the interaction of oxygen and cerium-free ions in molten 3LiCl-2KCl eutectic, determining the stable states of cerium compounds and their thermodynamic properties. The solubility constants of cerium oxychloride and oxide compounds were determined at different temperatures, and a Pourbaix diagram was drawn to summarize the properties of stable cerium species in the melt.
The interaction of oxygen and cerium-free ions in molten 3LiCl-2KCl eutectic in the temperature range of (723-823) K was studied by the method of potentiometric titration using YZME electrodes. Stable states of cerium compounds in the Ce-O system and the mechanism of interaction of Ce3+ with O-2 ions have been established. The solubility constants of cerium oxychloride and oxide compounds at different temperatures were determined. Principal thermodynamic data of CeOCl and Ce2O3 were calculated. The Pourbaix (potential-pO(2)) diagram was drawn and summarizes the properties of stable cerium species in the melt. (C) 2020 Elsevier Ltd.
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