About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
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Aluminum Reduction Technology
|
| Presentation Title |
Sulfur balance between dry scrubber and electrolysis cell in order to understand effects of pot gas recirculation
|
| Author(s) |
Ole S. Kjos, Camilla Sommerseth, Thomas Park Simonsen, Håvard Olsen, Anders Sørhuus, Isak Fossan, Sihathalan Srikumar, Ellen Myrvold, Kim Ronny Elstad, Helene Marie Eng Granlund |
| On-Site Speaker (Planned) |
Ole S. Kjos |
| Abstract Scope |
To capture CO<sub>2</sub> efficiently from aluminum smelters it is beneficial to reduce the overall amount of gas to be treated. This can be done by off gas recirculation, where off gas is conditioned and re-introduced to the cell. The mass balance of sulfur across a dry scrubber is of essential importance to plan for. In preparation for possible modifications of the Pot Integrated Abart (PIA) concept to recirculate off gas for CO<sub>2</sub> up-concentration insight in the sulfur balance between the raw gas, gas exiting the scrubber and sulfur adsorbed on the secondary alumina was needed.
A measurement campaign using FTIR on both raw gas and scrubbed gas simultaneously along with SO<sub>3</sub> sampling, and samples of secondary alumina from the PIA was designed. The equilibrium between SO<sub>2</sub> and SO<sub>3</sub> is of high importance as accumulation of SO<sub>3</sub> in the raw gas loop can lead to condensation of sulfuric acid. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Environmental Effects, |