|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Late News Posters
||PP-14: Electrochemical Studies of Inert Anodes for the CaCl2-CaO Melts Deoxidation
||Olivier Lemoine, Jerome Serp, Mathieu Gibilaro, Pierre Chamelot, Gilles Bourgès
|On-Site Speaker (Planned)
reduction of a metal oxide by calcium in a cacl2 melt produces metal and calcium oxide (cao) dissolved in molten cacl2. in order to minimize waste salt volume, the spent salts have to be regenerated by electrolytic decomposition of cao into ca and o2(g). three anode material behaviors (au, pt and sno2) have been compared by voltammetry in cacl2-cao (1wt %) at 850°c. sno2 anode was chosen for cacl2-cao electro-deoxidation investigation.
to prevent anodic and cathodic specie recombination, the experimental set up comprised an alumina tube for anodic gas extraction and a reactive gallium cathode to trap the ca formed as ga-ca alloys.several electro-deoxidation were performed in cacl2-cao melts (5 -10wt %) at 850°c. the results show that final oxide concentration in melt was lower to 1wt%, the current efficiency of oxygen production was close to 82% in average. however, the sno2 electrode was damaged after 3 re-uses.