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- Title
Scale-up design of a 300 kA magnesium electrolysis cell based on thermo-electric mathematical models.
- Authors
Liu, Chenglin; Sun, Ze; Lu, Guimin; Song, Xingfu; Ding, Yulong; Yu, Jianguo
- Abstract
Magnesium production process is highly energy intensive. Electrolysis provides an effective route to reduce energy consumption and greenhouse gas emission for the magnesium production. This paper concerns the scale-up design of a 300 kA magnesium electrolysis cell using a three-dimensional thermo-electric mathematical model. The model provides information on the steady-state thermoelectric fields thus allowing the evaluation of the effects of structure parameters (anode-cathode distance, anode thickness, cathode thickness, anode width, and anode number) on the current intensity, resistance voltage drop, and current density. Non-dimensional analyses give a linear relation between the current intensity and a set of dimensionless numbers, which upon further comprehensive analyses, gives a criterion for the scale-up. Such a scale-up criterion is found to be able to predict, within 1%, the amperage of 300 kA magnesium electrolysis cells. The results suggest that the criterion could be used for the scale-up design of magnesium electrolysis cells with a high current intensity.
- Subjects
ELECTROLYSIS; MAGNESIUM compounds; THERMOELECTRIC effects; MATHEMATICAL models; CHEMICAL engineering
- Publication
Canadian Journal of Chemical Engineering, 2014, Vol 92, Issue 7, p1197
- ISSN
0008-4034
- Publication type
Article
- DOI
10.1002/cjce.21940