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Calorimetric studies on the electrorefining process of copper

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Abstract

Calorimetric measurements were carried out on the electrorefining of copper using different current densities with a Calvet type microcalorimeter at room temperature. The ratio (R) of the measured heat (Q m orW m) to the input electric energy (Q in orW in) and the excess heat (Q ex orW ex), i.e. the difference betweenQ m (orW m) andQ in (orW in) during the electrorefining process were discussed in terms of general thermodynamics. It was found thatR andQ ex were related to the current density employed in the experiment and varied as a logarithmic function. The results obtained here indicate that the heat generation under different conditions, such as different currents or voltages, may be caused partially by the irreversibility of the process or by some unknown processes.

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Authors and Affiliations

  1. Institute of Chemistry, Academia Sinica, 100080, Beijing, China

    Zhongliang Zhang, Fuming Liu, Manhong Liu & Zhenzhen Wang

  2. National Engineering Development Center of High Technology Energy-Storage Materials, USA

    Faping Zhong & Feng Wu

Authors
  1. Zhongliang Zhang
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  2. Fuming Liu
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  3. Manhong Liu
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  4. Zhenzhen Wang
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  5. Faping Zhong
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  6. Feng Wu
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Additional information

Dedicated to Prof. Menachem Steinberg on the occasion of his 65th birthday

The authors would like to acknowledge the extreme encouragements and help of Professor Shuyi Liu (University of Science and Technology of China) and Professors Fu Tan and Guoquan Liu (Institute of Chemistry, Academia Sinica).

This study was supported by the National Nature Science Foundation of China.

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Zhang, Z., Liu, F., Liu, M. et al. Calorimetric studies on the electrorefining process of copper. Journal of Thermal Analysis 50, 89–103 (1997). https://doi.org/10.1007/BF01979552

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  • DOI: https://doi.org/10.1007/BF01979552

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