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Estimation of current bypass in a bipolar electrode stack from current-potential curves

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Abstract

A simple method is proposed for the estimation of the current bypass from experimental current-potential (i-U) curves measured for a “bipolar reactor” and with a one-element cell of similar geometry. The model is valid only in the region where a lineari-U relation is obtained.

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Abbreviations

F :

Faraday constant (C mol−1)

i o :

electrical feed current density (A m−2)

i i :

current density in cellj (A m−2)

I o :

current (A)

N :

number of cells

P :

pressure (N m−2)

R :

gas constant (J mol−1 K−1)

R e :

slope of the linear part of thei-U relation for one element cell (Ω m2)

T :

temperature (K)

U o :

intercept of the lineari-U relation withU axis for one element cell (V)

U 1 :

potential difference for one element cell (V)

U N :

potential difference for a bipolar electrode stack with N cells (V)

U j :

potential difference for cellj in the stack (V)

V :

experimental gas flow rate (m3s−1)

V o :

theoretical gas flow rate given by Relation (7) (m3s−1)

Ψ:

current bypass

References

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  5. E. Kaminski and R. Savinell,J. Electrochem. Soc. 130 (1983) 1103.

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  6. J. A. Holmes and R. E. White, in ‘Electrochemical Cell Design’, (edited by R. E. White). Plenum, New York (1984) p. 311.

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  7. J. B. Riggs, The Electrochemical Society Extended Abstracts, No. 123,80–82 (1980) p. 333.

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Authors and Affiliations

  1. Institute of Chemical Engineering, Swiss Federal Institute of Technology, CH-1015, Lausanne, Switzerland

    Ch. Comninellis, E. Plattner & P. Bolomey

Authors
  1. Ch. Comninellis
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  2. E. Plattner
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  3. P. Bolomey
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Comninellis, C., Plattner, E. & Bolomey, P. Estimation of current bypass in a bipolar electrode stack from current-potential curves. J Appl Electrochem 21, 415–418 (1991). https://doi.org/10.1007/BF01024577

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  • DOI: https://doi.org/10.1007/BF01024577

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