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Chemical Thermodynamics and Reaction Kinetics of Bayer Process Desilication Read chapter Read first chapter

2024 | OriginalPaper | Chapter

Fundamental Loss of Current Efficiency During Aluminium Electrolysis and Its Correlation with Sodium Content Dissolved in the Aluminium

Authors : Lukas Dion, Paul Desclaux

Published in: Light Metals 2024

Publisher: Springer Nature Switzerland

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Abstract

Primary aluminium producers are inclined to maximize the cells’ current efficiency in order to enhance metal production and reduce production cost. For timely decisions, sodium content of the cathodic aluminium has been used as a performance indicator related to individual cell performances. This paper pinpoints the straightforward quantitative theoretical relation which exists between sodium content and current efficiency. This relation is based on the fundamental thermodynamics of the changing bath composition in the boundary layers and on mass transfers at the anodic and cathodic interfaces. Few simplifying hypotheses are used to predict the cell’s optimal current efficiency under a specific set of operating conditions. The proposed calculation methodology is described and a critical discussion is performed to highlight the impact of different factors on the current efficiency along with future considerations necessary to improve the current efficiency estimations.

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previous chapter Dimensional Analysis Applied to the Dissolution and Disintegration of Alumina Rafts: The Riddle of Dissolving Alumina Rafts Solved
next chapter Novel Developments for Inert Anodes and Wettable Cathodes in Aluminium Electrolysis
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Metadata
Title
Fundamental Loss of Current Efficiency During Aluminium Electrolysis and Its Correlation with Sodium Content Dissolved in the Aluminium
Authors
Lukas Dion
Paul Desclaux
Copyright Year
2024
Book
Light Metals 2024

Print ISBN: 978-3-031-50307-8

Electronic ISBN: 978-3-031-50308-5

Copyright Year: 2024

DOI
https://doi.org/10.1007/978-3-031-50308-5_81

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