| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Electrode Technology for Aluminum Production
|
| Presentation Title |
An EXAFS and XANES Study of V, Ni, and Fe Speciation in Cokes for Anodes Used in Aluminum Production |
| Author(s) |
Goril Jahrsengene, Hannah C Wells, Camilla Sommerseth, Arne Petter Ratvik, Lorentz Petter Lossius, Katie H Sizeland, Peter Kappen, Ann Mari Svensson, Richard G Haverkamp |
| On-Site Speaker (Planned) |
Goril Jahrsengene |
| Abstract Scope |
Lower quality petroleum coke with higher levels of sulfur and metal impurities will have to be used for the manufacturing of anodes for aluminum production in the future. Sulfur and metallic impurities affect the anode properties in the aluminum production process, but the chemical identity of the metal species in the coke is not known. In this work, industrial petroleum cokes with high sulfur levels were analysed by XANES and EXAFS in order to determine the identity of the V, Ni and Fe impurities. It was found that V is present mainly as hexagonal V3S4. Ni is present mainly as hexagonal NiS, and Fe is present as hexagonal FeS. This knowledge of the chemical state of the metal elements in coke, which are known to affect anode performance, is the first step in understanding the mechanism of the action of these elements on anode reactivity. |
| Proceedings Inclusion? |
Planned: Light Metals |