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Proceedings/Recueil Des Communications Année : 2018

Perfluorocarbon Formation During Rare Earth Electrolysis

Karen Sende Osen
  • Fonction : Auteur
Ana Maria Martinez
  • Fonction : Auteur
Henrik Gudbrandsen
  • Fonction : Auteur
Anne Støre
  • Fonction : Auteur
Camilla Sommerseth
  • Fonction : Auteur
Ole Kjos
  • Fonction : Auteur
Thor Anders Aarhaug
  • Fonction : Auteur
Heiko Gaertner
  • Fonction : Auteur
Mathieu Gibilaro
Laurent Massot

Résumé

A challenge during rare earth (RE) electrolysis is to avoid emissions of perfluorocarbon (PFC) green-house gases. The objective of this work was to study how to operate the RE electrolysis process with neither PFC formation nor anode effect. Linear Sweep Voltammetry was carried out at 1050 and 1100 °C, and electrolysis was performed in REF3-LiF melts at ca. 1050 °C during on-line off-gas analysis. To avoid anode effect, the current density values must be strictly less than 0.43 and 0.68 A cm−2 at working temperatures of 1050 and 1100 °C, respectively. The optimal REO batch feed rate for avoiding PFC formation could be established by correlating the onset of PFC with the values and the changes that occurred in the anode potential.

Dates et versions

hal-04142886 , version 1 (27-06-2023)

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Citer

Karen Sende Osen, Ana Maria Martinez, Henrik Gudbrandsen, Anne Støre, Camilla Sommerseth, et al.. Perfluorocarbon Formation During Rare Earth Electrolysis. Springer International Publishing, pp.1443-1448, 2018, The Minerals, Metals & Materials Series, ⟨10.1007/978-3-319-72284-9_188⟩. ⟨hal-04142886⟩
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