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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium High Temperature Electrochemistry IV
Presentation Title Feasibility of Potentiometry for Monitoring Activity of GdCl3 in Molten LiCl-KCl Salt
Author(s) Guoping Cao, Steven Herrmann, Guy Fredrickson, Robert Hoover, Kevin Tolman
On-Site Speaker (Planned) Guoping Cao
Abstract Scope In pyroprocessing spent nuclear fuels by electrorefining in LiCl-KCl salt, it is desired to monitor the UCl3 concentration for safeguard purposes. A potentiometry approach was evaluated herein for real time monitoring of GdCl3, a surrogate for UCl3, in LiCl-KCl salt, using a Gd metal electrode and a Ag/AgCl reference electrode (RE). The open circuit potential (OCP) of a Gd metal electrode versus the Ag/AgCl RE was measured, while GdCl3 salt was incrementally added into the LiCl-KCl salt, followed by additions of LaCl3, CeCl3 and NdCl3. It was shown that (1) the potentiometry measurement using Gd metal and Ag/AgCl RE can be used to measure the GdCl3 concentration in the tested 0.05--1.7 mol% GdCl3 range and (2) the addition of a small amount of LaCl3 and CeCl3 did not affect the activity of GdCl3 in the LiCl-KCl-GdCl3 salt system, but the addition of NdCl3 did affect potentiometry measurements of LiCl-KCl-GdCl3.
Proceedings Inclusion? Planned:
Keywords Electrometallurgy, Nuclear Materials, Recycling and Secondary Recovery

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Comparative Study of Working Electrode Materials for Voltammetry Measurements in LiCl–Li2O Salts
Advances in Solid Oxide Membrane Based Electrolysis for Solar-grade Silicon Deposition
Effect of Hydroxide and Oxide Impurities in Electrochemical Processes Using Molten LiCl and CaCl2
Electrochemical Reactions of Oxide Ions with Tungsten in Molten CaCl2
Feasibility of Potentiometry for Monitoring Activity of GdCl3 in Molten LiCl-KCl Salt
First-principles Molecular Dynamics and CALPHAD Modeling of the CaF2-MgF2-SiO2 Molten Salt System
Fundamental Challenges for the Development of Electrolytic Reduction of Uranium Oxide in Molten LiCl-Li2O
High-speed Electrodeposition of Textured Monolithic Lithiated Transition Metal Oxide Cathodes for Low Cost, High Energy, and Fast Charging Li-ion Batteries.
Interaction between Solute Species and Metallic Alloying Elements in Molten Chloride Systems
Investigation on Preparation of Fe-Al Alloys by Direct Reduction of Fe2O3-Al2O3 Powder in CaCl2-NaCl Molten Salt System
Liquid Bipolar Electrode for Extraction of Aluminium and PGM Concentrate from Spent Catalysts
Molten Hydroxide Mediated Electrosynthesis of Layered Transition Metal Oxides for Electrochemical Energy Storage
New Electrochemical Deoxidation Method of Ti Metal in Molten Salts Containing YCl3
Optimizing Reaction Selectivity in High Temperature Molten Electrolytes
Selective Extraction of Gold from Gold-copper Alloy Using Anodic Electrochemical Deposition in Molten Salt Electrolyte
Validated Modeling of Quartzite Reduction to Solar Silicon by Molten Salt Electrolysis

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