About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials and Chemistry for Molten Salt Systems
|
Presentation Title |
N-16: Robust and Standardized High-temperature Molten Chloride Salt Reference Electrode |
Author(s) |
Suhee Choi, Jim Steppan, Michael F. Simpson |
On-Site Speaker (Planned) |
Suhee Choi |
Abstract Scope |
Molten salts are known to be adaptable electrolytes with wide electrochemical potential windows, enabling both reduction and deposition of most metals. Therefore, molten salts have been utilized in various industries such as metal refining and pyroprocessing for recycling spent nuclear fuel. For applications, a stable reference electrode is essential to monitor and control electrochemical reactions. In this study, we investigated the stability of high-temperature molten chloride reference electrodes (MCREs) using mullite and magnesia tubes as reference electrode membrane materials in molten MgCl2-KCl-NaCl. Two electrochemical methods were used to characterize the long-term performance of MCREs at elevated temperatures (500°C): open circuit potential (OCP) versus platinum and cyclic voltammetry (CV) for up to 30 days. The OCP values and the onset potentials of chlorine evolution and magnesium reduction show similar behavior for the mullite and magnesia membranes. |
Proceedings Inclusion? |
Planned: |
Keywords |
Pyrometallurgy, Recycling and Secondary Recovery, |