Development of a Fully Dynamic Simulation of a Zinc Electrowinning Tankhouse

Mahon, Michael; Peng, Spencer; Wasik, L. S.; Alfantazi, Akram

doi:10.1002/9781118371350.ch6

Cited by 3 publications

(1 citation statement)

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“…Dukovic and Tobias 13 built a model to predict the current distribution change and the increment in cell voltage caused by the presence of bubbles attached to the electrode surface. Later, Mahon et al 8,14 developed a model base on the Barton and Scott 9 model for potential use in the process control and optimization. To improve this model, it incorporates the prediction of voltage, current efficiency, and reaction kinetics.…”

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confidence: 99%

Modeling Zinc Electrowinning for Current Efficiency Prediction Based on Nernst-Plank Equation and Electrode Gas Evolution Reaction Kinetics

Zhang

Werner

Free

2018

J. Electrochem. Soc.

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Zinc electrowinning is by nature complex, involving the electrodeposition of Zn ions on cathode, oxygen evolution on the anode, as well as the hydrogen evolution on the cathode as a side reaction which decreases the current efficiency and increases the energy consumption while improving local mass transport. Because of the capital-intensive features and the low efficiencies of experimental research approaches, modeling and simulation have become a promising way to study the electrowinning processes. The coupling of gas-liquid two-phase flow from gas evolution with the electrochemistry process, however, is challenging to simulate. In this paper, an approach of building a comprehensive Zn electrowinning model based on COMSOL Multiphysics was introduced. Further, the basic model results in velocity field, concentration distribution, gas fractions, and current efficiency were demonstrated and discussed. In addition, validation of the current efficiency predictions from the model was performed through a comparison with experimental test data.

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confidence: 99%