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Berlin 2024 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 3: Topical Session: Sustainable metallurgy

MM 3.7: Vortrag

Montag, 18. März 2024, 12:15–12:30, C 130

On the development of Ni-Fe-Cu anodes for sustainable, CO2-free aluminium electrolysis — •Tom Jamieson1, Ralf Busch1, Andrei Iasinkskii2, Jon Magnusson3, Gudmundur Gunnarsson4, Peer Decker5, Roman Duessel5, and Isabella Gallino11University of Saarland, Saarbruecken, Germany — 2RWTH Aachen University, Aachen, Germany — 3IceTec, Reykjavik, Iceland — 4Arctus Metals Ltd, Reykjavik, Iceland — 5TRIMET Aluminium SE, Germany

CO2-free aluminium could be produced from renewable energy sources through an electrolytic process by using inert anodes and wetted drained cathodes as a sustainable substitute to the Hall-Héroult process. Primary aluminium production is a worldwide, energy intensive industry with estimates suggesting the contribution to the global tonnage of greenhouse gas emissions is as high as 1%. The use of consumable carbon anodes in the Hall-Héroult process is a significant contributor to greenhouse gas production, with 1.5t of CO2 produced per tonne of aluminium.

Ni-Fe-Cu alloys have emerged as a strong candidate for inert anodes with a study spanning large parts of the composition space currently lacking. Our work aims to undertake a systematic investigation of the key anodic properties (corrosion resistance, cell stability, purity of resultant aluminium) as a function of the alloy composition to determine an optimal composition range for electrolysis cell performance.

Keywords: Electrolysis; Sustainability; Oxidation; Alloy; Anode

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