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Optimal control problems arising in the zinc sulphate electrolyte purification process


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  • Ling Wang
  • Wei Gui
  • Kok Teo


  • Ryan Loxton
  • Chun Yang
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    Before zinc electrolysis, zinc powder is added to the zinc sulphate electrolyte solution to facilitate the removal of harmful metallic ions. This purification process can be modeled by a time delay differential equation. Since some of the parameters in this model are unknown, zinc powder is normally added excessively. We use an optimization technique to estimate the unknown parameters from experimental data. Then, we formulate an optimal control problem to minimize the amount of zinc powder added. We solve this optimal control problem numerically by using the control parametrization method. The results indicate that the amount of zinc powder added can be decreased, on average, by approximately 7%. Copyright Springer Science+Business Media, LLC. 2012

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    Bibliographic Info

    Article provided by Springer in its journal Journal of Global Optimization.

    Volume (Year): 54 (2012)
    Issue (Month): 2 (October)
    Pages: 307-323

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    Handle: RePEc:spr:jglopt:v:54:y:2012:i:2:p:307-323

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    Keywords: Zinc sulphate electrolyte; Purification process; Continuous stirred tank reactor; Optimal control; Time delay system; Multiple characteristic time points;


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