PFC evolution characteristics during aluminium and rare earth electrolysis
PFC evolution characteristics during aluminium and rare earth electrolysis
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DOI：
10.1007/978-3-319-72284-9_189
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发表时间：
2018-03
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影响因子：
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通讯作者：
O. Kjos;A. Solheim;T. Aarhaug;K. Osen;A. Martínez;Camilla Sommerseth;H. Gudbrandsen;Anne Støre;H. Gaertner
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文献类型：
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作者：
O. Kjos;A. Solheim;T. Aarhaug;K. Osen;A. Martínez;Camilla Sommerseth;H. Gudbrandsen;Anne Støre;H. Gaertner
除铝电解外，从氟化物熔体中电解稀土金属也是向大气排放全氟化碳的重要来源。这些工艺有许多相似之处，它们都是基于在1000 °C左右的温度下进行熔融氟化物盐电解，并利用碳材料作为阳极。虽然铝工业和稀土电解的PFC排放具有相似的总体反应，但它们通常具有不同的特性。为了更好地了解这些差异和相似之处，不同的实验室实验侧重于阳极反应和气体组成的铝和稀土金属电解在Al 2 O3饱和的冰晶石和REF 3-LiF熔体进行了研究。所获得的结果，结合热力学数据分析，可以更好地了解不同的化学性质的熔融氟化物系统中的PFC演变的开始，演变和终止行为。
In addition to aluminium electrolysis, the electrolysis of rare earth (RE) metals from fluoride melts is a significant source of perfluorocarbon (PFC) emissions to the atmosphere. These processes have many similarities, they are both based on molten fluoride salt electrolysis at temperatures around 1000 °C, and are utilizing carbon materials as the anode. Although PFC emissions from aluminium industry and rare earth electrolysis have similar overall reactions, they are often reported to have different characteristics. In order to get a better understanding of these differences and similarities, different laboratory experiments focusing on anode reactions and gas compositions in Al2O3saturated cryolite and REF3-LiF melts during aluminium and rare earth metal electrolysis were studied. The results obtained, combined with thermodynamic data analysis allowed to better understand onset, evolution and termination behaviour of PFC evolution in molten fluoride systems of different chemistries.