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Structural, Dynamic, and Thermodynamic Study of KF–AlF3 Melts by Combining High-Temperature NMR and Molecular Dynamics Simulations
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2019-01-22 , DOI: 10.1021/acs.jpcc.8b11907
Kelly Machado 1 , Didier Zanghi 1 , Mathieu Salanne 2 , Catherine Bessada 1
Affiliation  

Molten cryolite (NaF–AlF3) plays a key role for aluminum production since it is used as a solvent. Among the various leads to improve the electrochemical processes, adding other fluoride salts is one of the most promising. However there are very less data on the impact of these additional species on the physicochemical properties of the melt. To fill this gap, we investigate the properties of high-temperature KF–AlF3 liquids by combining NMR spectroscopy, molecular dynamics, and density functional theory calculations. Our results show that the speciation and consequently the transport properties differ from that of cryolite. This work will allow assessing the interest of adding KF in aluminum production processes.

中文翻译:

高温NMR和分子动力学模拟相结合的KF-AlF 3熔体的结构,动力学和热力学研究。

熔融冰晶石(NaF–AlF 3)由于被用作溶剂,因此在铝的生产中起着关键作用。在改善电化学过程的各种方法中,添加其他氟化物盐是最有前途的方法之一。但是,关于这些附加物质对​​熔体的物理化学性质的影响的数据很少。为了填补这一空白,我们通过结合NMR光谱,分子动力学和密度泛函理论计算来研究高温KF–AlF 3液体的特性。我们的结果表明,形态和因此的运输性质与冰晶石不同。这项工作将有助于评估在铝生产过程中添加KF的兴趣。
更新日期:2019-01-22
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