Recycling of Rare Earth Magnets with Sulfur Based Chemistries and High Temperature Processing
Rare-earth(RE)-iron-boron permanent magnets are among the strongest permanent magnets available and power essential technologies, from wind turbines to hard disk drives. The production of the rare earth metal for these magnets currently involves significant greenhouse gas emissions and other environ...
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| Format: | Thesis |
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Massachusetts Institute of Technology
2024
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| Online Access: | https://hdl.handle.net/1721.1/155352 |
| _version_ | 1826204960872726528 |
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| author | Adams, Zachary Kenneth |
| author2 | Allanore, Antoine |
| author_facet | Allanore, Antoine Adams, Zachary Kenneth |
| author_sort | Adams, Zachary Kenneth |
| collection | MIT |
| description | Rare-earth(RE)-iron-boron permanent magnets are among the strongest permanent magnets available and power essential technologies, from wind turbines to hard disk drives. The production of the rare earth metal for these magnets currently involves significant greenhouse gas emissions and other environmental impacts. Additionally, the production of these metals is geographically complicated, as over 95% of rare earth metals are produced in China, which leads to supply-chain concerns and price fluctuations. Recycling of the rare earth elements is imperative to decrease net emissions and for the sustainability of RE-based magnets, but current magnet recycling is limited. In this work, sulfidation is investigated in the context of RE separation and recovery from RE-based magnets. Evidence of rare-earth separation and selectivity are presented, with insights into the underlying sulfidation mechanism involved for actual magnet processing. |
| first_indexed | 2024-09-23T13:04:20Z |
| format | Thesis |
| id | mit-1721.1/155352 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T13:04:20Z |
| publishDate | 2024 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1553522024-06-28T03:29:42Z Recycling of Rare Earth Magnets with Sulfur Based Chemistries and High Temperature Processing Adams, Zachary Kenneth Allanore, Antoine Massachusetts Institute of Technology. Department of Materials Science and Engineering Rare-earth(RE)-iron-boron permanent magnets are among the strongest permanent magnets available and power essential technologies, from wind turbines to hard disk drives. The production of the rare earth metal for these magnets currently involves significant greenhouse gas emissions and other environmental impacts. Additionally, the production of these metals is geographically complicated, as over 95% of rare earth metals are produced in China, which leads to supply-chain concerns and price fluctuations. Recycling of the rare earth elements is imperative to decrease net emissions and for the sustainability of RE-based magnets, but current magnet recycling is limited. In this work, sulfidation is investigated in the context of RE separation and recovery from RE-based magnets. Evidence of rare-earth separation and selectivity are presented, with insights into the underlying sulfidation mechanism involved for actual magnet processing. S.M. 2024-06-27T19:46:55Z 2024-06-27T19:46:55Z 2024-05 2024-05-13T19:23:01.047Z Thesis https://hdl.handle.net/1721.1/155352 In Copyright - Educational Use Permitted Copyright retained by author(s) https://rightsstatements.org/page/InC-EDU/1.0/ application/pdf Massachusetts Institute of Technology |
| spellingShingle | Adams, Zachary Kenneth Recycling of Rare Earth Magnets with Sulfur Based Chemistries and High Temperature Processing |
| title | Recycling of Rare Earth Magnets with Sulfur Based Chemistries and High Temperature Processing |
| title_full | Recycling of Rare Earth Magnets with Sulfur Based Chemistries and High Temperature Processing |
| title_fullStr | Recycling of Rare Earth Magnets with Sulfur Based Chemistries and High Temperature Processing |
| title_full_unstemmed | Recycling of Rare Earth Magnets with Sulfur Based Chemistries and High Temperature Processing |
| title_short | Recycling of Rare Earth Magnets with Sulfur Based Chemistries and High Temperature Processing |
| title_sort | recycling of rare earth magnets with sulfur based chemistries and high temperature processing |
| url | https://hdl.handle.net/1721.1/155352 |
| work_keys_str_mv | AT adamszacharykenneth recyclingofrareearthmagnetswithsulfurbasedchemistriesandhightemperatureprocessing |