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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium High Temperature Electrochemistry IV
Presentation Title Validated Modeling of Quartzite Reduction to Solar Silicon by Molten Salt Electrolysis
Author(s) Aditya Moudgal, Mohammad Asadikiya, Jacob Hazerjian, Vicky Luu, Ariana Ly, Adam C. Powell, Uday Pal, Yu Zhong
On-Site Speaker (Planned) Aditya Moudgal
Abstract Scope This talk presents a validated Finite Element Analysis (FEA) model of coupled current density distribution, fluid flow with magneto-hydrodynamics (MHD) and heat and mass transfer in molten salt electrolysis reduction of quartzite (SiO₂) to solar silicon. The electrolyte is MgF₂-CaF₂ eutectic with additions of CaO to enhance SiO₂ solubility, and YF₃ to reduce corrosion rate of yttria-stabilized zirconia (YSZ) solid oxide membrane (SOM) anodes. The FEA model and experiments show effects of stirring on current density distribution, of current and the boundary layer on electrolyte composition adjacent to the cathode and YSZ SOM, and of current density on temperatures and conductivities. The FEA model also estimates performance characteristics of an industrial silicon electrolysis cell, including MHD stirring using the magnetic field generated by the current bus (SOM anodes do not provide gas lift stirring). Finally, a techno-economic model estimates process cost, energy consumption, and direct and indirect greenhouse gas emissions.
Proceedings Inclusion? Planned:
Keywords Modeling and Simulation, Electronic Materials, Electrometallurgy


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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