|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Gas Anodes Made of Porous Graphite for Aluminium Electrowinning
||Babak Khalaghi, Henrik Gudbrandsen, Ole Kjos, Karen Osen, Ove Paulsen, Tommy Mokkelbost, Geir Martin Haarberg
|On-Site Speaker (Planned)
Greenhouse gas (GHG) emission is one of the main challenges of the current aluminium production process. Consumable carbon anodes have a major share in GHG emissions from the electrolysis cells. On the other hand, a commercial inert oxygen-evolving anode has not been found yet. Another possibility is to supply the anodes with a reducing gas, such as methane. Indeed, the anodes must be porous. The reducing gas can alter the anodic reaction which in turn, decreases the CO2 emission. Besides, participation of methane in the anode reaction should give a lower anode potential, which may assist to reduce partial perfluorocarbons emissions during industrial operation. Different porous graphite grades were tested as gas anode material for aluminium electrolysis. The effect of graphite properties on the gas flow in the porous structure was studied. Electrolysis experiments were also carried out to detect the changes in the anodic reaction and subsequent gas emission.
||Planned: Light Metals