Electrical conductivities of aqueous ZnSO4?H2SO4 solutions

Hinatsu, James T.; Tran, Vance; Foulkes, F. R.

doi:10.1007/bf01030180

Cited by 14 publications

(11 citation statements)

References 8 publications

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“…The literature values 19 at temperatures up to 156 °C (along the vapor−liquid saturation curve) are also shown in Figure . As seen from Figures and , there is an excellent agreement between the measured conductivities of H 2 SO 4 and the literature values. − The average difference between the values measured in this work and the literature values 17-19 at all temperatures was within ±1%. To obtain the reproducibility of the measurements, as explained in the experimental procedure, some of the measurements were repeated up to four times.…”

Section: Specific Conductivities Of Pure Aqueous H2so4 Solutionssupporting

confidence: 83%

“…To assess the overall performance of the new cell, the conductivities of H 2 SO 4 solutions were measured and compared with the literature values. − First, the conductivities of aqueous H 2 SO 4 solutions at 25 °C and at concentrations from 0.01 to 0.45 m were measured. These measurements along with the relevant literature values at 25 °C 17,18 are shown in Figure .…”

Section: Specific Conductivities Of Pure Aqueous H2so4 Solutionsmentioning

confidence: 99%

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High-Temperature Conductivity Measurements for Industrial Applications. 1. A New Cell

Baghalha

Papangelakis

2000

Ind. Eng. Chem. Res.

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A novel conductivity cell, suitable for high-temperature industrial applications, was developed. The cell body was made of Pyrex glass, and the electrodes were made of pure platinum. It was mounted in a 2 L titanium pressure vessel. The effects of the platinization of the electrodes and the level of conductance on the cell constant were extensively studied. It was found that the cell with the platinized electrodes has a very stable cell constant at 19.97 ( 0.06 cm -1 , for conductivity levels ranging from 1000 to 100 000 µS/cm. The change in the cell constant when the temperature changes from 25 to 250 °C is less than 0.1%. The cell is operable at the equilibrium vapor pressure from low to high acidities. To assess the overall performance of the new cell, the conductivities of 0.05 m H 2 SO 4 solutions at temperatures from 15 to 250 °C were measured. These measurements were in excellent agreement with literature values with a difference of less than 1%.

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Section: Specific Conductivities Of Pure Aqueous H2so4 Solutionssupporting

confidence: 83%

Section: Specific Conductivities Of Pure Aqueous H2so4 Solutionsmentioning

confidence: 99%

High-Temperature Conductivity Measurements for Industrial Applications. 1. A New Cell

Baghalha

Papangelakis

2000

Ind. Eng. Chem. Res.

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Section: Comparison Of Models With Synthetic Solutionssupporting

confidence: 92%

“…According to Aalto-I, increases in both temperature and H2SO4 have a positive effect on conductivity, whereas the presence of metal ions (Zn, Mn, Mg) has a negative impact on solution conductivity. These findings are in agreement with earlier studies of Zn electrowinning conductivity [15,[24][25][26], and are similar to the behavior found for Cu, Ni, and As, in copper electrowinning electrolytes [22]. From Figure 3, it can be seen that model Aalto-I clearly has valid coefficients throughout the parameters tested, whereas Aalto-II shows that there are valid correlations between both Zn and H 2 SO 4 with temperature.…”

Section: Aalto Conductivity Modelssupporting

confidence: 91%

Modelling the Effect of Solution Composition and Temperature on the Conductivity of Zinc Electrowinning Electrolytes

Wang

Aji

Wilson

et al. 2021

Metals

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Zinc electrowinning is an energy-intensive step of hydrometallurgical zinc production in which ohmic drop contributes the second highest overpotential in the process. As the ohmic drop is a result of electrolyte conductivity, three conductivity models (Aalto-I, Aalto-II and Aalto-III) were formulated in this study based on the synthetic industrial electrolyte conditions of Zn (50–70 g/dm3), H2SO4 (150–200 g/dm3), Mn (0–8 g/dm3), Mg (0–4 g/dm3), and temperature, T (30–40 °C). These studies indicate that electrolyte conductivity increases with temperature and H2SO4 concentration, whereas metal ions have negative effects on conductivity. In addition, the interaction effects of temperature and the concentrations of metal ions on solution conductivity were tested by comparing the performance of the linear model (Aalto-I) and interrelated models (Aalto-II and Aalto-III) to determine their significance in the electrowinning process. Statistical analysis shows that Aalto-I has the highest accuracy of all the models developed and investigated in this study. From the industrial validation, Aalto-I also demonstrates a high level of correlation in comparison to the other models presented in this study. Further comparison of model Aalto-I with the existing published models from previous studies shows that model Aalto-I substantially improves the accuracy of the zinc conductivity empirical model.

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“…The final correlation was generated by the authors by a least-squares fit of the conductivity measurements reported by Hinatsu et al 30 and matches their data to within (0.55 Ω -1 ‚m -1 (see Figure 3). All the above correlations give similar results for typical industrial zinc electrolytes, ca.…”

Section: Resultsmentioning

confidence: 99%

Physicochemical Properties of ZnSO₄−H₂SO₄−H₂O Electrolytes of Relevance to Zinc Electrowinning

Bestetti

Guerra

2006

J. Chem. Eng. Data

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To facilitate the optimization of and/or design of zinc electrowinning reactors, certain properties of zinc electrolytes, which are functions of electrolyte composition and temperature, have been investigated through a literature review that has been complemented, where applicable, by theoretical calculations. A new set of Pitzer model parameters has been determined for ZnSO 4 -H 2 SO 4 -H 2 O solutions from an examination of isopiestic data. Empirical correlations for zinc electrolyte conductivity, absolute viscosity, and density have also been examined. An expression for predicting the diffusion coefficient of zinc ions in acidic zinc sulfate solutions was also developed.

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Electrical conductivities of aqueous ZnSO4?H2SO4 solutions

Cited by 14 publications

References 8 publications

High-Temperature Conductivity Measurements for Industrial Applications. 1. A New Cell

High-Temperature Conductivity Measurements for Industrial Applications. 1. A New Cell

Modelling the Effect of Solution Composition and Temperature on the Conductivity of Zinc Electrowinning Electrolytes

Physicochemical Properties of ZnSO₄−H₂SO₄−H₂O Electrolytes of Relevance to Zinc Electrowinning

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Electrical conductivities of aqueous ZnSO4?H2SO4 solutions

Cited by 14 publications

References 8 publications

High-Temperature Conductivity Measurements for Industrial Applications. 1. A New Cell

High-Temperature Conductivity Measurements for Industrial Applications. 1. A New Cell

Modelling the Effect of Solution Composition and Temperature on the Conductivity of Zinc Electrowinning Electrolytes

Physicochemical Properties of ZnSO4−H2SO4−H2O Electrolytes of Relevance to Zinc Electrowinning

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Physicochemical Properties of ZnSO₄−H₂SO₄−H₂O Electrolytes of Relevance to Zinc Electrowinning