Electrode mass transfer under conditions of natural and forced convection

Cooke, Adam; Chilton, J. P.; Fray, Derek J.

doi:10.1007/bf02670346

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…This is due to the decrease of the copper concentration with time, which is accompanied by an increase in the cathodic polarization. 13 Also, a decrease in the limiting current value was achieved, altering the experimental conditions of 0.8 of the limiting current. This, in turn, favors the evolution of hydrogen gas, at the limiting current with its associated over-potential.…”

Section: Effect Of Current Densitymentioning

confidence: 99%

“…This is due to the variation in anode potential and the effect of the redox Fe +++ /Fe ++ reaction on the anode, which occurs at a much lower potential than the oxygen evolution reaction and has a lower activation polarization. 13,14 In addition, Fe +++ cations may react with the deposited copper resulting in re-dissolution of the deposited copper. 15 Figure 8 reveals that the current efficiency is progressively decreased with the increase of Fe ++ concentrations in solution.…”

Section: Effect Of Current Densitymentioning

confidence: 99%

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The electroremoval of copper from dilute waste solutions using Swiss-roll electrode cell

Saba

Sherif

Elsayed

2007

JOM

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Research Summary Aqueous ProcessingCopper is usually present in concentrations less than 5 g/L 1 in dilute waste solutions. The low concentrations make these solutions unsuitable for the electrowinning processes via conventional electrolysis cells. Unconventional, two-and three-dimensional electrode cells with relatively large cathodic area are essential for such treatment. Different types of cells are mentioned in the literature. Among these cells, the two-dimensional Swiss-roll cell (SR) is considered in this study. The effects of cathodic current densities, initial copper concentrations, free sulfuric acid concentration, the presence of iron and zinc cations, and the rate of fl ow of the solution on both the cathodic current effi ciency and power consumption were studied. Copper was removed from synthetic and industrial mixtures of Cu/Fe/Zn sulfate solutions to less than 5 ppm with power consumptions of 10.326 kWh/kg 1 and 8.61 kWh/kg 1 , respectively. The correlation between the SR cell and packed-column cell on such treatment was also considered.

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Section: Effect Of Current Densitymentioning

confidence: 99%

Section: Effect Of Current Densitymentioning

confidence: 99%

The electroremoval of copper from dilute waste solutions using Swiss-roll electrode cell

Saba

Sherif

Elsayed

2007

JOM

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“…These include replacement of the conventional anode reaction with an oxidation reaction of SO 2 [4], or Fe 2? ions [5,6], addition of Co 2? ions to the electrolyte in the conventional cell [7] and the use of alternative anodes [3,[8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and physical characterisation of lead-based anodes in comparison to Ti–(70%) IrO2/(30%) Ta2O5 dimensionally stable anodes for use in copper electrowinning

2009

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The suitability of various dimensionally stable anodes (DSAs Ò ) was investigated in comparison to the conventional lead alloy anodes in the electrowinning of copper. DSA Ò plate and mesh specimens of composition Ti-(70%) IrO 2 /(30%) Ta 2 O 5 and lead-(6%) antimony were evaluated. The electrochemical behaviour of these anodes was studied by carrying out open circuit potential measurements, galvanostatic chronopotentiometry, cyclic voltammetry and chronoamperometry. Physical characterisation was done using a scanning electron microscope. It was observed that the DSA Ò plate anode exhibited the highest corrosion resistance followed by the DSA Ò mesh and lead anodes, respectively. The results also showed that during copper electrowinning using lead anodes, dissolution of the anode occurs while for both DSAs Ò marginal loss of coating was observed. The lead anode had the highest anode potential followed by the DSA Ò plate and mesh anodes, respectively. Overall, it was demonstrated that the DSA Ò plate anode is the most suitable anode for copper electrowinning.

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Forced ion flux by multi-redox molecule to break diffusion limit and boost electrode process

Fan

Hou

Lin

et al. 2022

Cell Reports Physical Science

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Electrode mass transfer under conditions of natural and forced convection

Cited by 4 publications

References 7 publications

The electroremoval of copper from dilute waste solutions using Swiss-roll electrode cell

The electroremoval of copper from dilute waste solutions using Swiss-roll electrode cell

Electrochemical and physical characterisation of lead-based anodes in comparison to Ti–(70%) IrO2/(30%) Ta2O5 dimensionally stable anodes for use in copper electrowinning

Forced ion flux by multi-redox molecule to break diffusion limit and boost electrode process

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