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<p>Copper powder is a valuable product that finds applications in the electrical industry, where it is used to fabricate motor and generator contact brushers. It is also used as a catalyst for organic synthesis and is widely used in the powder metallurgy technique to fabricate composites of unique properties. Since the electrodeposition of Cu powder is a diffusion-controlled reaction that takes place at the limiting current, the present work aims to explore the possibility of using H<sub>2,</sub> which evolves simultaneously at the cathode as a stirring agent for enhancing the rate of production. Using gas stirring would reduce the capital and operating cost of the process owing to the elimination of mechanical stirring systems and power consumption. H<sub>2</sub> stirring was found to enhance the rate of production by a factor ranging from 2.25 to 9, compared to the natural convection value depending on H<sub>2</sub> discharge velocity and CuSO<sub>4</sub> concentration. The corresponding increase in energy consumption was far less than the increase in the rate of mass transfer and the rate of production. The energy utilization efficiency of a gas-evolving reactor was found to be higher than that of a natural convection reactor. Energy utilization efficiency (kA/ε) was found to decrease with increasing current density (H<sub>2</sub> discharge velocity) and increasing CuSO<sub>4</sub> concentration.</p>

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Comparative Performance Evaluation of Gas-Evolving and Natural Convection Electrochemical Cells for Copper Powder Recovery

  • 期刊论文

  • 发表日期：

    2026年1月15日

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  • O. A. Hassan,
  • Y. A. El-Taweel,
  • G. H. Sedahmed,
  • M. H. Abdel-Aziz,
  • E-S. Z. El-Ashtoukhy,
  • S. Mustafa

摘要

Copper powder is a valuable product that finds applications in the electrical industry, where it is used to fabricate motor and generator contact brushers. It is also used as a catalyst for organic synthesis and is widely used in the powder metallurgy technique to fabricate composites of unique properties. Since the electrodeposition of Cu powder is a diffusion-controlled reaction that takes place at the limiting current, the present work aims to explore the possibility of using H2, which evolves simultaneously at the cathode as a stirring agent for enhancing the rate of production. Using gas stirring would reduce the capital and operating cost of the process owing to the elimination of mechanical stirring systems and power consumption. H2 stirring was found to enhance the rate of production by a factor ranging from 2.25 to 9, compared to the natural convection value depending on H2 discharge velocity and CuSO4 concentration. The corresponding increase in energy consumption was far less than the increase in the rate of mass transfer and the rate of production. The energy utilization efficiency of a gas-evolving reactor was found to be higher than that of a natural convection reactor. Energy utilization efficiency (kA/ε) was found to decrease with increasing current density (H2 discharge velocity) and increasing CuSO4 concentration.