Rates of cylindrical and spherical copper anodes dissolving into concentrated NaCl water solution calculation during electrolysis and temperature increasing

Yarmolenko, M.V.

doi:10.1016/j.ijft.2023.100539

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2024

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Cited by 3 publications

References 11 publications

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Hydrogen production with a novel coaxial cylindrical electrolyser: A CFD study

Ismail,

Erdemir,

Dincer

2024

International Journal of Thermofluids

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Hydrogen production with a novel coaxial cylindrical electrolyser: A CFD study

Ismail,

Erdemir,

Dincer

2024

International Journal of Thermofluids

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Electric Current Value Decreasing due to H_2 and Cl_2 Gas Formation near Electrodes during Electrolysis Calculation

Yarmolenko

2023

Preprint

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Our investigations show that the degradation rate of aluminium (Al) cylindrical anodes increases with the temperature of concentrated NaCl solution increasing from 20°C to 100°C during electrolysis at an electric current density of 3,000 A/m2. The general quantity of Al3+ ions also increases with temperature. Electric current value also increases with temperature. The general quantity of H' and Cl' ions decreases during electrolysis at all temperatures since H2 and Cl2gases are formed near electrodes. We have calculated that it decreases the electric current value by 1.3%. The degradation rate of copper (Cu) cylindrical anodes decreases with the temperature of concentrated NaCl solution increasing from 20°C to 100°C during electrolysis at an electric current density of 3,000 A/m2. The general quantity of Cu+ and Cu2+ ions also decreases with temperature. We guess that the only reason for the increasing electric current value is the average charge of copper ions, which increases from +1 at room temperature to +1.5 at 100°C and to +2 at 180°C.

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Rates of cylindrical and spherical copper anodes dissolving into concentrated NaCl water solution calculation during electrolysis and temperature increasing

Yarmolenko

2024

Preprint

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Our experimental investigations show that rate of copper anodes degradation decreases during electrolysis in concentrated NaCl solution in water (5 mol/kg or 23 %, freezing point equals −22°C, pH 6.5–7.5) at electric current density about 3000 A/m2 (or 30 A/dm2 = 3 mA/mm2) with temperature increasing from room temperature to 100 °C. Electric current value also increases with temperature increasing. Really, such result is unexpected. General quantity of the H+ and Cl− ions decreases during electrolysis at all temperatures since the H2 and Cl2 gases are formed near electrodes. General quantity of the Cu+ and Cu2+ ions decreases with temperature increasing too. We guess that one reason only should be for electric current value increasing: average charge of copper ions increases from +1 at room temperature to +1.5 at 100 °C and to +2 at 180°C. Corresponding mathematical model is proposed for the analysis. Literature experimental data are used too.

show abstract

Rates of cylindrical and spherical copper anodes dissolving into concentrated NaCl water solution calculation during electrolysis and temperature increasing

Cited by 3 publications

References 11 publications

Hydrogen production with a novel coaxial cylindrical electrolyser: A CFD study

Hydrogen production with a novel coaxial cylindrical electrolyser: A CFD study

Electric Current Value Decreasing due to H_2 and Cl_2 Gas Formation near Electrodes during Electrolysis Calculation

Rates of cylindrical and spherical copper anodes dissolving into concentrated NaCl water solution calculation during electrolysis and temperature increasing

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