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Recoveries of Valuable Metals from Spent Nickel Metal Hydride Vehicle Batteries via Sulfation, Selective Roasting, and Water Leaching
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering.ORCID iD: 0000-0002-3239-5188
2018 (English)In: Journal of Sustainable Metallurgy, ISSN 2199-3823Article in journal (Refereed) Published
Abstract [en]

The recoveries of rare earth elements (REEs), nickel, and cobalt from hybrid electric vehicle batteries by sulfation, selective roasting, and water leaching have been studied. The cathode and anode materials of a Panasonic Prismatic Module nickel metal hydride (NiMH) battery were used in the study. The optimal conditions for each step of the process were determined by performing lab-scale experiments. It was found that 8 mol/L of sulfuric acid was sufficient for the sulfation with a solid-to-liquid ratio of 1/5. The optimal roasting conditions was determined to be 850 °C for 2 h. Under optimal conditions, 96% of the REEs could be obtained in the aqueous phase with negligible contamination of Ni and Co. The Ni and Co remained in solid phase as oxides together with traces of aluminum, zinc, and iron oxides. This method provides a way for the separation of the REEs from nickel, cobalt, and other elements present in the NiMH battery, into a leachate suitable for further processing.

Place, publisher, year, edition, pages
Springer, 2018.
Keywords [en]
Hydrometallurgy Rare earth recovery Selective roasting NiMH battery recycling
National Category
Chemical Engineering
Research subject
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-226570DOI: 10.1007/s40831-018-0169-1OAI: oai:DiVA.org:kth-226570DiVA, id: diva2:1199622
Note

QC 20180509

Available from: 2018-04-21 Created: 2018-04-21 Last updated: 2018-05-09Bibliographically approved

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Korkmaz, KivancAlemrajabi, MahmoodRasmuson, Åke C.Forsberg, Kerstin

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