| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Process Metallurgy and Environmental Engineering: An EPD Symposium in Honor of Takashi Nakamura
|
| Presentation Title |
Electrolysis of Alkaline Iodide Solution for Hydrogen Production and Valuable Metal Recovery from E-waste |
| Author(s) |
Yu-Ki Taninouchi, Hiroaki Nakano, Tetsuya Uda |
| On-Site Speaker (Planned) |
Yu-Ki Taninouchi |
| Abstract Scope |
We present our recent study on the development of a novel process combining hydrogen production and valuable metal recovery from E-waste. In the process, an alkaline solution containing iodide ions is electrolyzed to produce hydrogen and iodate ions at the cathode and anode, respectively. In commercial alkaline water electrolysis for hydrogen production, the oxygen evolution reaction occurs at the anode. The decomposition voltage of the electrolyte can be lowered by converting the anodic reaction from oxygen evolution to iodate ion formation. Furthermore, the iodate ion is one of the most effective oxidizing agents for dissolving tin in alkaline media without heating. E-waste contains tin as solder and plating, and its recycling will be more important in the future. The alkaline solution obtained by electrolysis in this study can be used as the leachate to separate and recover tin from E-waste. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Extraction and Processing, Recycling and Secondary Recovery, Hydrometallurgy |