Effective Copper Diffusion Coefficients in CuSO4–H2SO4 Electrowinning Electrolytes

Bauer, J.; Moats, Michael S.

doi:10.1007/978-3-030-36296-6_114

Cited by 4 publications

(2 citation statements)

References 21 publications

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“…Journal of The Electrochemical Society, 2023 170 083505 (ii) Effective copper diffusion coefficients in CuSO 4 -H 2 SO 4 solutions. 38 −It is given by < 2.5) and temperature (25 < T (°C) < 60). The results are described using the following empirical functions: 39 It is worth highlighting that the activation energy, E, had an average value of 15.74 kJ/mol and was used to best fit the results.…”

Section: Rayleigh Number Ra Grsc 15mentioning

confidence: 99%

Exploring the Impact of Concentration and Temperature Variations on Transient Natural Convection in Metal Electrodeposition: A Finite Volume Method Analysis

Colli,

Bisang

2023

J. Electrochem. Soc.

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A mathematical model was developed to accurately determine the current density, concentration, and velocity profiles in electrochemical reactors operating under natural convection conditions. The model considers the interplay of key variables, such as potential, concentration, and temperature linked to the hydrodynamics through the density field using the Boussinesq approximation. Thus, a comprehensive analysis under both laminar and turbulent flow conditions is provided. The computational algorithm that represents the model is implemented in OpenFOAM and it offers the ability to operate the reactor at a fixed cell potential difference or under potentiostatic and galvanostatic control. The model's accuracy was verified in different parallel-plate reactors using copper deposition as a test reaction from dilute and concentrated solutions, showing a strong agreement with the experimental results. This tool can be leveraged to optimize cell design and operating conditions in electrochemical systems that involve significant natural convection, such as in the electrowinning and electrorefining industries.

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Section: Rayleigh Number Ra Grsc 15mentioning

confidence: 99%

Exploring the Impact of Concentration and Temperature Variations on Transient Natural Convection in Metal Electrodeposition: A Finite Volume Method Analysis

Colli,

Bisang

2023

J. Electrochem. Soc.

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“…The rotational speed was 88 RPM to simulate average hydrodynamic conditions found on the cathode in industrial copper electrowinning (i.e. a boundary layer thickness of ~113 µm) (Bauer and Moats, 2020). A SS cylinder was mounted on the rotating shaft as a substrate for copper electrodeposition.…”

Section: Galvanostatic Plating In the Rotating Cylinder Hull Cell (Rchc)mentioning

confidence: 99%

Electrochemical codeposition of arsenic from acidic copper sulfate baths: The implications for sustainable copper electrometallurgy

Verbruggen

Ostermeyer

Bonin

et al. 2022

Minerals Engineering

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Copper producers face increased demand associated with increasing complexity in feedstock composition, including high amounts of impurity metals. In this work, linear sweep voltammetry was used to study the electrodeposition behavior of copper and arsenic, define strategies for the production of grade A copper, and the removal of arsenic from complex electrolytes. Our results show that the copper concentration is a key parameter to control in the electrodeposition process. The continuous deposition of arsenic from the electrolyte requires copper in solution (≤10 g L − 1 Cu(II) for 2 g L − 1 As(III)) to form copper arsenides. The deposition of metallic arsenic does not occur readily. Conversely, the use of a concentrated Cu(II) solution (e.g. 40 g L − 1 ) resulted in grade A copper from an electrolyte with a maximum of 2 g L − 1 As(III) under galvanostatic control at a current density of -42 mA cm − 2 . Time-of-Flight Secondary Ion Mass Spectrometry depth profile measurements on copper deposits revealed that arsenic contamination was entirely concentrated near the substrate side of the deposit and progressively decreased further into the deposit. The codeposition of arsenic occurred along with the initial copper nucleation, when the electrochemical potential for electrodepostion under galvanostatic control is temporarily lower. These findings provide important insights for future sustainable copper electrodeposition technologies from complex feedstocks.

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Nodule Formation on Copper Electrodeposits in the Rotating Cylinder Hull Cell

Bauer

Moats

2022

Metall Mater Trans B

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Effective Copper Diffusion Coefficients in CuSO4–H2SO4 Electrowinning Electrolytes

Cited by 4 publications

References 21 publications

Exploring the Impact of Concentration and Temperature Variations on Transient Natural Convection in Metal Electrodeposition: A Finite Volume Method Analysis

Exploring the Impact of Concentration and Temperature Variations on Transient Natural Convection in Metal Electrodeposition: A Finite Volume Method Analysis

Electrochemical codeposition of arsenic from acidic copper sulfate baths: The implications for sustainable copper electrometallurgy

Nodule Formation on Copper Electrodeposits in the Rotating Cylinder Hull Cell

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