Public defence in Processing of Materials, M.Sc.(Tech.) Desmond Attah-Kyei
Public defence from the Aalto University School of Chemical Engineering, Department of Chemical and Metallurgical Engineering
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The title of the thesis: The use of alternative reductants in pyrometallurgical operations
Thesis defender: Desmond Attah-Kyei
Opponent: Prof. Caisa Samuelsson, Luleå University of Technology, Sweden
Custos: Prof. Daniel Lindberg, Aalto University School of Chemical Engineering, Department of Chemical and Metallurgical Engineering
The metallurgical industry is one of the highest contributors to carbon emission globally. This work explored the use of alternative reductants in metal recovery processes to reduce environmental impacts and greenhouse gas emissions. The study focused on employing hydrogen, biochar, and PCB leach residue from electronic waste to recover valuable metals from secondary sources like slag. The results demonstrated that hydrogen and biochar offer faster reduction kinetics and higher efficiency compared to traditional methods, while PCB leach residue showed promise at lower temperatures. This study supports efforts to make metal productions more economically friendly by providing practical solutions to reduce reliance on fossil fuels. By combining thermodynamic modeling and lab scale experiments, this research contributes significantly to the ongoing transition to greener pyrometallurgical operations.
Keywords: Alternative reductants, Secondary resources, Thermodynamic modeling, Metal recovery
Thesis available for public display 10 days prior to the defence at: https://aaltodoc.aalto.fi/doc_public/eonly/riiputus/
Contact:
| dattahkyei@gmail.com |
Doctoral theses in the School of Chemical Engineering: https://aaltodoc.aalto.fi/handle/123456789/51