| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Thermochemical Measurements of FeCl<sub>2</sub> in Molten LiCl Environment |
| Author(s) |
Jarrod Gesualdi, Timothy Lichtenstein, Eva Schneiderlochner, Krista L. Hawthorne |
| On-Site Speaker (Planned) |
Jarrod Gesualdi |
| Abstract Scope |
Efficient electrodeposition of Fe metal in fused salt systems requires a robust understanding of bulk solution behavior (e.g. activity, Gibbs free energy) of Fe ions. Thermochemical properties of FeCl<sub>2</sub> in LiCl at 640 °C were determined using the electromotive force (emf) method to better understand FeCl<sub>2</sub> solution behavior. Emf measurements were performed in solutions with known concentration between 0.1–7.7 mol% FeCl<sub>2</sub> in LiCl. Electrochemical titration of FeCl<sub>2</sub> was used to generate known concentrations. Measured values were calibrated to the Li<sup>+</sup>/Li couple in pure LiCl via a Li<sup>+</sup>/LiBi reference electrode with known emf vs. Li<sup>+</sup>/Li. This relationship was used to calculate FeCl<sub>2</sub> activity in LiCl-FeCl<sub>2</sub> (e.g. a<sub>FeCl2</sub> = 6.35 ×10-4 at 640 °C at 0.5 mol% FeCl<sub>2</sub> in LiCl). Deviation from Henry’s law occurred as FeCl<sub>2</sub> concentration increased. Improved understanding of the thermodynamic properties of this system serves to enable better understanding of more complex fused salt (e.g. chloride-fluoride) systems. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Electrometallurgy, Iron and Steel, Pyrometallurgy |