Process Optimization to Avoid Perfluorocarbon Emission During Neodymium Rare Earth Electrolysis in Molten LiF-NdF3-Nd2O3-Reference-Cited by-同舟云学术

Process Optimization to Avoid Perfluorocarbon Emission During Neodymium Rare Earth Electrolysis in Molten LiF-NdF₃-Nd₂O₃

Published:2022-08-01 Issue:8 Volume:169 Page:083501
ISSN:0013-4651
Container-title:Journal of The Electrochemical Society
language:
Short-container-title:J. Electrochem. Soc.

Author:

Gibilaro M.^ORCID,Remazeilles C.,Massot L.^ORCID,Chamelot P.

Abstract

Influence of Nd2O3 in LiF-NdF3-Nd2O3 melt on carbon anode oxidation was investigated by infra-red spectroscopy and electrochemical techniques to prevent CFX(g) formation during Nd metal production. A gas extractor device was developed to provide fast analysis of the electrochemically produced gas: the carbon anode was only oxidized into CO2(g) until a critical current density was reached. For higher values, CF4(g) and C2F6(g) were also produced. It was associated to diffusion limited current density of NdOF5 4−. To avoid CFX(g) production during the process, the influence of Nd2O3 and temperature on this limiting current density was determined by steady-state voltammetry.

Publisher

The Electrochemical Society

Subject

Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials

Link

https://iopscience.iop.org/article/10.1149/1945-7111/ac8377/pdf

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