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An environmental-friendly alternative to recovery Rare Earth Elements from spent NdFeB permanent magnets by electrochemical recycling process

Project description

Electrochemical recycling of rare earth elements from spent NdFeB permanent magnets

Electric motors and generators featuring NdFeB permanent magnets play a crucial role in the EU’s objective of achieving net-zero by 2050. These magnets encompass 30 % rare-earth elements (REEs), with neodymium (Nd) being the primary component, which is predominantly sourced from China. For consistent REEs supply, efficient and eco-friendly magnets recycling methods are needed. The MSCA-funded REEcycle project is geared towards elucidating the leaching mechanism of REEs from spent NdFeB magnets. It also seeks to recover REEs in a selective manner through electrochemical leaching utilising organic acids. By employing organic acids and adopting an electrochemical methodology, the project aims to devise an eco-friendly recycling process and advance the EU’s understanding of REEs recycling potential and behaviour.

Objective

The European Union (EU) has the ambitious target to reach net zero greenhouse gas emissions by 2050. The current energy transition is playing a crucial role in achieving a greener future by electrification of industries and the use of renewable resources for energy. Many greener applications rely on electric motors or generators that contain NdFeB permanent magnets (PM) in large quantities. The composition of these magnets is about 30 % of rare-earth elements (REEs), mainly neodymium (Nd). The worldwide supply of REEs is controlled by China (85 %). As the demand of REEs is increasing, due to energy transition, it is important for the EU to ensure a continuous supply of REEs. Recycling end-of-life magnets is a feasible alternative to obtain REEs from secondary resources. With REEcycle research project, my objective is to determine, for the first time, the leaching mechanism of REEs in NdFeB magnet scrap, aiming at selective recovery of REEs by means of electrochemical leaching in organic acids. I will combine different electrochemical approaches at different scales to evaluate the electroleaching efficiency in organic acids aiming at the selection of the most suitable acid and process conditions for a high dissolution rate of REEs. Then, to determine the leaching mechanism under electrochemical effect, I will use a recently developed local electrochemical technique, scanning electrochemical cell microscopy (SECCM), which will indicate the dissolution parameters for each element present in the NdFeB matrix. Finally, with the findings from SECCM, I will be able to promote a controlled electroleaching in organic acid followed by oxidation of Fe2+, to selectively recover the REEs from the magnet scrap. With my project, the use of organic acids and an electrochemical approach will bring the realisation of a sustainable recycling of permanent magnets a step forward, thereby contributing to the EUs knowledge in REE supply from secondary sources.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

(opens in new window) HORIZON-MSCA-2022-PF-01

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Coordinator

TECHNISCHE UNIVERSITEIT DELFT
Net EU contribution
€ 187 624,32
Total cost
No data

Partners (1)