期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 346, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.molliq.2021.118147
关键词
Molten salts; Fused salts; Liquid chlorides; Thermophysical properties; Neutron radiography
资金
- Laboratory Directed Research and Development (LDRD) program at Los Alamos National Laboratory, United States [20190650DI, 20210113DR]
This study experimentally measured the melt point, enthalpy of fusion, and volumetric expansion of liquid chlorides. A novel method using neutron radiography was introduced for density measurement. The results and proposed model are significant for understanding the thermophysical properties of liquid chlorides.
Melt point, enthalpy of fusion, and volumetric expansion of single- and multi-component liquid chlorides {NaCl, KCl, LiCl, MgCl2, CaCl2, UCl3} were measured experimentally. These properties and materials are relevant in applications such as heat transfer, liquid nuclear fuel, and pyrochemical processing. A novel method for density measurement by neutron radiography was shown to produce high-quality data, consistent with reference literature where available, and allowed measurement of some materials for the first time. This method is especially useful in the characterization of sealed sample crucibles, given the ability of neutrons to penetrate the containment and surrounding furnace material. The results of this study are presented within the context of a comprehensive review of the available published data. The purpose of this review is to integrate measurements of the thermophysical properties of liquid chlorides into empirical descriptions of the relationships between composition, temperature, and thermophysical properties. A model for the prediction of the density of mixtures of liquid chlorides is proposed and demonstrated within a case study of the {NaCl + x mol% UCl3} system. A discussion of saturated vapor pressure as a function of temperature is presented as a supplemental interpretation of potential deviation from ideal mixture behavior, which remains an area active research. (C) 2021 The Authors. Published by Elsevier B.V.
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