Perfluorocarbon Formation During Rare Earth Electrolysis

被引：3

作者：

Osen, Karen Sende ^{[1
]}

Martinez, Ana Maria ^{[1
]}

Gudbrandsen, Henrik ^{[1
]}

Store, Anne ^{[1
]}

Sommerseth, Camilla ^{[1
]}

Kjos, Ole ^{[1
]}

Aarhaug, Thor Anders ^{[1
]}

Gaertner, Heiko ^{[1
]}

Chamelot, Pierre ^{[2
]}

Gibilaro, Mathieu ^{[2
]}

Massot, Laurent ^{[2
]}

机构：

[1] SINTEF Mat & Chem, N-7465 Trondheim, Norway

[2] Univ Toulouse, Lab Genie Chim, F-31062 Toulouse, France

来源：

LIGHT METALS 2018 | 2018年

基金：

欧盟地平线“2020”;

关键词：

Rare earth metals; Alloys; Molten fluorides; Rare earth oxides; Electrolysis; PFC;

D O I：

10.1007/978-3-319-72284-9_188

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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 degrees C, and electrolysis was performed in REF3-LiF melts at ca. 1050 degrees 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 degrees 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.

引用

页码：1443 / 1448

页数：6

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