|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||High Temperature Electrochemistry IV
||Nickel Alloy Inert Anodes for Molten Carbonates Electrolysis Process
||Kaifa Du, Peilin Wang, Dihua Wang
|On-Site Speaker (Planned)
Molten carbonates electrolysis process has been demonstrated to be a promising approach towards CO2 utilization and green metallurgy without CO2 emissions, where a robust inert anode for oxygen evolution is crucial for success. Nickel alloys are potential candidates of inert anode owing to their good thermostability, electronic conductivity and machinability. Here, we investigated the performance of several kinds of nickel alloy anodes in molten carbonates, including the influence of sulfate additions. Nickel alloy anodes showed a temperature effect with a critical activation-passivation transition temperature at 575 °C. Above this temperature, the nickel alloy anodes were passivated forming dense oxide film and possessed excellent performance for oxygen evolution. But pitting corrosion and anodic dissolution took place on the nickel alloy anodes in the electrolyte with SO42- addition.
||Environmental Effects, Electrometallurgy, Copper / Nickel / Cobalt