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The electrical conductivity of fluidized bed electrodes—its significance and some experimental measurements

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Abstract

By applying a mathematical model (developed by Newman and Tobias for porous electrodes) to a fluidized bed electrode it can be concluded that the effective electrical conductivity of the bed is a key parameter affecting bed performance. Poor current and power efficiencies and operational difficulties are predicted for beds with low electrical conductivities and it is suggested that high conductivities may also cause operational difficulties. An apparatus for measuring bed conductivities is described and some results are presented for beds of copper particles in the size range 270 μ. to 385 μ. Bed conductivity was relatively insensitive to particle size and electrolyte conductivity but decreased sharply as the bed expanded. From the results it was possible to infer that the dominant mechanism of electrical conduction in the fluidized bed, under the conditions studied, was through “chains” of particles in momentary electrical contact.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, University of California, 94720, Berkeley, CA

    B. J. Sabacky (Graduate Student) & J. W. Evans (Associate Professor)

Authors
  1. B. J. Sabacky
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  2. J. W. Evans
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Sabacky, B.J., Evans, J.W. The electrical conductivity of fluidized bed electrodes—its significance and some experimental measurements. Metall Trans B 8, 5–13 (1977). https://doi.org/10.1007/BF02656345

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  • DOI: https://doi.org/10.1007/BF02656345

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