| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
H-13: Characterization of LiCl-KCl Eutectic and LiCl-KCl+H2O Mixtures Using Electrochemical Impedance Spectroscopy |
| Author(s) |
Litun Swain, Gurudas Pakhui, Suddhasattwa Ghosh, Bandi Prabhakara Reddy |
| On-Site Speaker (Planned) |
Litun Swain |
| Abstract Scope |
Molten salt electrorefining of alloy fuels, which is one of the batch operations in pyroprocessing, is carried out in LiCl-KCl eutectic melt, and its purity is of paramount importance as presence of any redox impurities would lead to deterioration of its long-term performance. Accidental ingress of moisture in eutectic mixtures is not ruled out in facilities where engineering scale demonstration of pyroprocessing technology is carried out requiring handling of large amounts of eutectic mixtures. Application of electrochemical techniques to investigate the purity of melts is an old subject, and several studies are reported in literature. In the present work, application of electrochemical impedance spectroscopy is explored to investigate redox mechanisms in binary eutectic melts with varying degrees of moisture content. Based on equivalent circuit fitting of complex impedance data, mechanism of reduction of moisture in eutectic melts is proposed, and formation of other secondary impurities is explained. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |