2022-Sustainable Industrial Processing Summit
SIPS2022 Volume 4 Kipouros Intl. Symp. Molten Salt, Ionic & Glass-forming Liquids & Powdered Materials
| Editors: | F. Kongoli, R. Fehrmann, V. Papangelakis, I.Paspaliaris, G. Saevarsdottir. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2022 |
| Pages: | 100 pages |
| ISBN: | 978-1-989820-40-7(CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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ELECTRICAL CONDUCTIVITY of MOLTEN SnCl2 at TEMPERATURES up to 1314 K
Alexei Potapov1; Alexander Salyulev1;1INSTITUTE OF HIGH TEMPERATURE ELECTROCHEMISTRY, Ekaterinburg, Russian Federation;
Type of Paper: Regular
Id Paper: 41
Topic: 13
Abstract:
KEYWORDS: Molten SnCl2; Electrical conductivity maxima.
The electrical conductivity of molten SnCl2 was measured in a wide temperature range (∆T = 763 K) from 551 K to temperature as high as 1314 K that is 391 degrees above the boiling point of the salt. The studied temperature range is extended by 79 degrees towards higher temperatures in comparison with the available data [1] and thereby the presence of the maximum in the electrical conductivity polytherm (2.815 S/cm at 1143 K) is confirmed.
Due to the fact that under our experimental conditions the values of vapor pressure above the melts reached several tens of atmospheres, the measurements were carried out in a specially constructed capillary type cell, designed to operate at high pressures. The cell was made of quartz with graphite electrodes [2, 3]. For conductivity measurements an AC bridge with the input frequency of 10 kHz was used.
Our data (∆T = 551–1314 K) are well approximated by the following equation:
k = -4.02417 + 1.19270*10-2T - 5.19936*10-6T2, S/cm; T, K. (1)
The “dome” area of the conductivity polytherm of molten SnCl2 (our data, ∆T = 968–1314 K) is approximated more precisely by the following equation:
k = -3.92031 + 1.17428*10-2T - 5.11853*10-6T2, S/cm; T, K. (2) After 1143 K the electrical conductivity decreases as the temperature increases. The fastest rate of reduction of the melt conductivity should be in the vicinity of a critical point of SnCl2: Tc = 1459 K and Pc = 12 MPa, as the melt becomes more and more gas-like.
The reasons for the appearance of maxima on the conductivity polytherms of molten stannous chloride are discussed.
Keywords:
Chloride; Conductivity;References:
[1] L.F. Grantham, S.J. Yosim, J. Chem. Phys. 45, (1966) 1192-1198.
[2] A.B. Salyulev, A.A. Red’kin, Rasplavy (Melts) 3 (1996) 20-27 (in Russian).
[3] A.B. Salyulev, A.M. Potapov, J. Chem. Eng. Data 60 (2015) 484-492.