Investigation of optimal conditions for zinc electrowinning from aqueous sulfuric acid electrolytes

Guillaume, Pascaline; Leclerc, Nathalie; Boulanger, Clotilde; Lecuire, J.M.; Lapicque, François

doi:10.1007/s10800-007-9377-2

Cited by 45 publications

(23 citation statements)

References 13 publications

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“…The metal oxide product is then leached with aqueous sulfuric acid. Leaching results in the formation of zinc sulfate in the aqueous sulfuric acid and the metal is then produced by electrodeposition [1]. However, electrodeposition of zinc is extremely sensitive to the presence of certain metallic impurities [2][3][4][5] in the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Effects of 1-butyl-3-methylimidazolium hydrogen sulfate-[BMIM]HSO4 on zinc electrodeposition from acidic sulfate electrolyte

Zhang

2008

J Appl Electrochem

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A comparative study of the effect of 1-butyl-3-methylimidazolium hydrogen sulfate-[BMIM]HSO 4 and gelatine on current efficiency (CE), power consumption (PC), deposit morphology, and polarization behaviour of the cathode during electrodeposition of zinc from acidic sulphate solutions were investigated. Compared with the traditional industrial additive, gelatine, the addition of [BMIM]HSO 4 was found to increase current efficiency, reduce power consumption, and improve the surface morphology. Maximum CE and minimum PC were obtained at the addition dosage of 5 mg dm -3 . Meanwhile, simultaneous addition of the two additives induced a blocking effect of the zinc reduction and led to more leveled and fine-grained cathodic deposits. Moreover, cyclic voltammetry results and kinetic parameters such as Tafel slope, transfer coefficient, and exchange current density obtained from Tafel plots led to the conclusion that both additives have a pronounced inhibiting effect on Zn 2? electroreduction. The data obtained from X-ray diffractogram revealed that the presence of additives did not change the structure of the electrodeposited zinc but affected the crystallographic orientation of the crystal planes.

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Section: Introductionmentioning

confidence: 99%

Effects of 1-butyl-3-methylimidazolium hydrogen sulfate-[BMIM]HSO4 on zinc electrodeposition from acidic sulfate electrolyte

Zhang

2008

J Appl Electrochem

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“…In the zinc-halogen batteries some of the factors that affect the zinc deposition here are the electrode substrate, the charging method, the cell geometry, the electrolyte hydrodynamics, the electrolyte composition and the zinc electrode morphology [45]. The investigation of aqueous zinc in sulfuric acid was carried out by Guillame [46] who reported that HER on stainless steel is inhibited by deposition of zinc and that the current density had little impact on the deposit morphology. The same study also reported that increasing the concentration of the zinc species (>2 × 10 −1 mol dm −3 ) yielded higher deposition current efficiencies, viz.…”

Section: Page 3 Of 25mentioning

confidence: 99%

Factors affecting the performance of the Zn-Ce redox flow battery

Nikiforidis

Cartwright

Hodgson

et al. 2014

Electrochimica Acta

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This version is available at https://strathprints.strath.ac.uk/50808/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThe Hull Cell was used to investigate the impact of current density j on the morphology and uniformity of zinc electrodeposited from a 2.5 mol dm −3 Zn 2+ solution in 1.5 mol dmmethanesulfonic acid at 40°C onto carbon-composite surfaces. The range of the applied deposition current density used was between 1 mA cm −2 and 100 mA cm −2 . Good, robust deposits were obtained when j ≥ 10 mA cm _2 whereas at j's lower than this, patchy films formed due to the competing hydrogen evolution reaction (HER) on the bare carboncomposite surface. An understanding of these effects and its application in the redox flow battery enabled both the coulombic and cell potential efficiencies to be maintained at relatively high values, 90% and 69% respectively, indicating a successful inhibition of the HER on the fully formed Zn layer. Flow velocity at the low Reynolds number in the cell (Re <200) had little impact on the electrochemical cell performance. Depletion of the cerium species became an issue for long charge times.

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“…It is revealed that the zinc cell house is responsible for approximately 80% of the energy used by an electrolytic zinc refinery. Thus, intensive research has been conducted to lower energy consumption or increase current efficiency per mass of zinc produced [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have examined optimal conditions for zinc electrowinning [3][4][5]. They utilized a variety of experimental cells and electrodes to test the effect of variables on cell performance.…”

Section: Introductionmentioning

confidence: 99%

A Fully Optimized Electrowinning Cell for Achieving a Uniform Current Distribution at Electrodes Utilizing Sampling-Based Sensitivity Approach

Choi¹,

Kim²,

Cho³

et al. 2015

Journal of Electrical Engineering and Technology

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-In this paper, a zinc electrowinning cell is fully optimized to achieve a uniform current distribution at electrode surfaces. To effectively deal with an electromagnetically coupled problem with multi-dimensional design variables, a sampling-based sensitivity approach is combined with a highly tuned multiphysics simulation model. The model involves the interrelation between electrochemical reactions and electromagnetic phenomena so as to predict accurate current distributions in the electrowinning cell. In the sampling-based sensitivity approach, Kriging-based surrogate models are generated in a local window, and accordingly their sensitivity values are extracted. Such unique design strategy facilitates optimizing very complicated multiphysics and multi-dimensional design problems. Finally, ten design variables deciding the electrolytic cell structure are optimized, and then the uniformity of current distribution in the optimized cell is examined through the comparison with existing cell designs.

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Investigation of optimal conditions for zinc electrowinning from aqueous sulfuric acid electrolytes

Cited by 45 publications

References 13 publications

Effects of 1-butyl-3-methylimidazolium hydrogen sulfate-[BMIM]HSO4 on zinc electrodeposition from acidic sulfate electrolyte

Effects of 1-butyl-3-methylimidazolium hydrogen sulfate-[BMIM]HSO4 on zinc electrodeposition from acidic sulfate electrolyte

Factors affecting the performance of the Zn-Ce redox flow battery

A Fully Optimized Electrowinning Cell for Achieving a Uniform Current Distribution at Electrodes Utilizing Sampling-Based Sensitivity Approach

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