| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Primary Aluminum Industry - Energy and Emission Reductions: An LMD Symposium in Honor of Halvor Kvande
|
| Presentation Title |
Gas Recycling and Energy Recovery. Future Handling of Flue Gas from Aluminium Electrolysis Cells |
| Author(s) |
Samuel Senanu, Asbjørn Solheim, Rune Lødeng |
| On-Site Speaker (Planned) |
Samuel Senanu |
| Abstract Scope |
Flue gas recycling and energy recovery provides an excellent opportunity for the aluminium industry to reduce the total energy consumption and to prepare for possible future carbon capture and storage or utilisation. Gas recycling enables increased CO2 concentration and more efficient recovery of heat from the flue gas. The present paper addresses some of the challenges with this technology, including increased concentrations of other pot gases such as CO, SO2 and HF and possible increased fugitive emissions due to reduced suction. Increased concentration of CO is particularly unwanted, since it is a lethal compound. Thus, catalytic conversion of CO to CO2 is crucial for HES reasons, and it also increases the amount of collectible heat. High concentration of SO2 can pose problems to equipment, including the heat exchanger units, due to the formation of sulfuric acid when the acid dew point is reached. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Energy Conversion and Storage, Environmental Effects |