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Thermokinetic Studies of the Process for Electrorefining Silver

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Abstract

In this work some calorimetric measurements were also carried out on the electrorefining silver by using different current densities with a Calvet type microcalorimeter at room temperature. The ratio (R) of the measured heat (

$$Q$$

m) to the input electric energy (

$$Q$$

in) and the excess heat (

$$Q$$

ex), i.e., difference between

$$Q$$

m and

$$Q$$

in during the electrorefining process, were discussed in terms of general thermodynamics. It was found that the R and

$$Q$$

ex for silver were related with the current density or cell voltage employed in the experiment. The results obtained here also 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, Beijing, 100080, P. R. China

    Z. L. Zhang, M. H. Zhong, J. Liu, F. M. Liu & Z. Z. Wang

  2. National Engineering Development Center of High Technology Energy-Storage Materials, Zhongshan, Guandong, 528437, P. R. China

    F. P. Zhong & F. Wu

Authors
  1. Z. L. Zhang
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  2. M. H. Zhong
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  3. J. Liu
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  4. F. M. Liu
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  5. Z. Z. Wang
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  6. F. P. Zhong
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  7. F. Wu
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Zhang, Z.L., Zhong, M.H., Liu, J. et al. Thermokinetic Studies of the Process for Electrorefining Silver. Journal of Thermal Analysis and Calorimetry 58, 421–433 (1999). https://doi.org/10.1023/A:1010167624684

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  • DOI: https://doi.org/10.1023/A:1010167624684

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