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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium High Temperature Electrochemistry III
Presentation Title Molten Flux Design for Solid Oxide Membrane Based Electrolysis of Si from Silica
Author(s) Thomas Villalon, Uday Pal, Soumendra Basu
On-Site Speaker (Planned) Uday Pal
Abstract Scope A one-end-closed oxygen-ion-conducting stabilized zirconia (SOM) tube is used to separate pure silica (SiO2) dissolved in an appropriately engineered molten flux from an inert anode placed inside the SOM tube. To ensure product purity, a pre-reduction step using a secondary cathode at lower applied potentials is employed to remove impurities that are more electronegative than Si. The impurity-laden secondary cathode is removed, and then employing a liquid tin cathode in the molten flux the applied potential is increased to reduce the dissolved silica. The reduced Si go into solution in the liquid tin cathode. Less electronegative impurity ions compared to Si remain in the flux. Thus impurity oxides of both more and less electronegative impurities are not reduced along with silica.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Effects of Oxide Precursor Preparation Parameters on the Electrochemical Reduction of Tantalum Pentoxide in Calcium Chloride Melt
Electrochemical and Thermodynamic Properties of Gadolinium Chloride in LiCl-KCl Eutectic Salt
Electrochemical Behavior of Sn/SnCl2 Cathode in Na | NaCl-AlCl3-SnCl2 | Sn Cell
Electrochemical Deposition of Barium into Liquid Bismuth from BaCl2-LiCl-CaCl2-NaCl Electrolyte
Electrochemical Synthesis of TaC in Molten Salt
Electrochemical Techniques for Nuclear Safeguards in Molten Salt
Electrochemistry in Molten 2LiF-BeF2 Salt for the Fluoride Salt-Cooled High Temperature Reactor Applications
Impurity Removal from Titanium Oxycarbide
Initial Operation of Kg-Scale Electrolytic Reduction and Salt Distillation Equipment for the Pyroprocessing of Uranium Oxide in a Hot Cell
Molten Flux Design for Solid Oxide Membrane Based Electrolysis of Si from Silica
Optimized Voltammetry Methods for Measuring Concentration of Multiple Rare Earths and Actinides in Molten LiCl-KCl
Thermal Imaging Furnace Technique for Ultra-high Temperature Electrochemical Measurements
Thermochemical Properties of Barium-Bismuth Alloys Determined by Emf Measurements
Thorium and Uranium Electrodeposition from Molten LiCl-KCl onto Alpha Spectroscopy Semiconductor Detector Surface
Zirconium Management in the Mk-IV Electrorefiner

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