|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Interfacial Boundary between Carbon Anodes and Molten Salt Electrolyte
||Wojciech Gebarowski, Camilla Sommerseth, Arne Petter Ratvik, Stein Rørvik, Espen Sandnes, Lorentz Petter Lossius, Hogne Linga, Ann Mari Svensson
|On-Site Speaker (Planned)
The properties of calcined petroleum cokes (CPC), used in the anodes in the Hall-Héroult process, are important for the electrochemical behaviour of the anodes. CPCs from different sources vary not only in impurity level but also in microstructure. The trend of available CPCs for anode production indicates an increase in impurities as well as introduction of more isotropic cokes. Hence, a better understanding of the behaviour of these materials during electrolysis is essential for optimizing performance. In previous studies, different anode cokes were characterized with respect to anode overpotential and the gas evolution during polarization. Present work focuses on investigation of the interfacial contact between the anode and the molten salt electrolyte. The interfacial contact is important for the electrochemically active area of the porous electrodes, which is different from the geometric area. Various electrochemical methods supported by wetting tests and computer tomography to study the interfacial boundary are used.
||Planned: Light Metals Volume