2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 1: Angell Intl. Symp. / Molten Salt, Ionic & Glass-forming Liquids: Processing and Sustainability
| Editors: | F. Kongoli, M. Gaune-Escard, J. Dupont, R. Fehrmann, A. Loidl, D. MacFarlane, R. Richert, M. Watanabe, L. Wondraczek, M. Yoshizawa-Fujita, Y. Yue |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2019 |
| Pages: | 177 pages |
| ISBN: | 978-1-989820-00-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Electrical conductivity of molten (LiCl-KCl)eut. - CsCl mixtures
Alexander Salyulev1; Alexei Potapov1;1INSTITUTE OF HIGH TEMPERATURE ELECTROCHEMISTRY, Ekaterinburg, Russian Federation;
Type of Paper: Regular
Id Paper: 99
Topic: 13
Abstract:
The aim of this work is to develop a model for the electrical conductivity of complex melts based on the LiCl-KCl eutectic, containing the spent nuclear fuel components. This message is a continuation of our work [1]. In the present study we measured the electrical conductivity of quasi binary melts (LiCl-KCl)eut., containing CsCl in concentration range 0 - 100 mol.%. Such molten mixtures are also of interest as solvents for various electrochemical applications.
We used in this work a capillary quartz cell with platinum electrodes and the AC-bridge method at the input frequency of 75 kHz. The measurements were carried out at the temperatures up to 900°C. The lowest temperature was 5-10 degrees below the liquidus temperature of all compositions in order to record the onset of the crystallization temperature. The liquidus line of this salt system is built.
It was found that the electrical conductivity of all melts increases with increasing temperature and decreases with increasing CsCl concentration. The specific electrical conductivity (κ, S/cm) of several molten mixture is exemplified below:
κ = -4.4529 + 9.9064*10-3T - 3.4082*10-6T2 , (671-1173 K) 20 mol.% CsCl;
κ = -3.5257 + 7.5152*10-3T - 2.4628*10-6T2 , (717-1175 K) 50 mol.% CsCl;
κ = -2.7114 + 5.8676*10-3T - 1.8094*10-6T2 , (864-1172 K) 80 mol.% CsCl.
In the molten (LiCl-KCl)eut. - CsCl mixtures the significant negative deviations of electrical conductivity from additive values were observed over the whole concentration range, indicating that the replacement of some alkaline cations by those, significantly different in size, is accompanied by a significant rearrangement of interparticle bonds, which results in different complexation in the system [2].
The electrical conductivity of molten LiCl - KCl - CsCl with a variable ratio of KCl / CsCl concentrations was also measured in [3].
Keywords: Molten salts; Conductivity; LiCl-KCl; CsCl;
Keywords:
Conductivity; Lithium; Moltensalt; Potassium;References:
[1] A. Salyulev, A. Potapov, V. Khokhlov, V. Shishkin, Electrochim. Acta 257 (2017) 510-515.[2] M.V. Smirnov, V.P. Stepanov, V.A. Khokhlov, Rasplavy (Melts) 1 (1987) 64-73 (in Russian).
[3] J. Li, B. Gao, W. Chen, Ch. Liu, Zh. Shi, X. Hu, Zh. Wang, J. Chem. Eng. Data 61 (2016) 1449-1453.