|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||High Temperature Electrochemistry III
||Electrochemical Deposition of Barium into Liquid Bismuth from BaCl2-LiCl-CaCl2-NaCl Electrolyte
||Hojong Kim, Nathan Smith, Timothy Lichtenstein, Kuldeep Kumar
|On-Site Speaker (Planned)
Using liquid bismuth metal that possesses strong chemical interactions with barium, we demonstrate that electrochemical separation of barium into a liquid bismuth electrode is possible from BaCl<SUB>2</SUB>-LiCl-CaCl<SUB>2</SUB>-NaCl (16-29-35-20 mol%) electrolyte at 600 °C. While the standard emf analysis suggests Na as the first species to deposit in this electrolyte, barium was found to be the first species to be reduced into the bismuth electrode followed by Ca. The exceptional barium deposition was ascribed to extremely low activity values of barium in bismuth (as low as 10<SUP>-15</SUP>), shifting the deposition potential of barium to the most positive potentials and resulting in barium deposition into bismuth. By exploiting the chemical interactions between barium and bismuth, this study suggests that liquid bismuth can potentially be employed in separating out alkali/alkaline-earth fission products such as Ba, Sr, and Cs from the molten salt electrolytes in the pyrochemical processes for used nuclear fuels recycling.
||Planned: Supplemental Proceedings volume