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Journal of Applied Electrochemistry

, Volume 37, Issue 8, pp 877–886 | Cite as

Effect of leakage currents on the primary current distribution in bipolar electrochemical reactors

  • E. R. Henquín
  • J. M. BisangEmail author
Original Paper

Abstract

The primary current distribution in a bipolar electrochemical reactor with outside inlet and outlet electrolyte manifolds was investigated by numerical solution of the Laplace equation and by experimental measurement in simulated cells made from conductive paper and segmented electrodes. The geometric parameters determining the distribution were the interelectrode gap, electrode length, transverse section and length of the electrolyte manifold. The effect of the number of electrodes in the bipolar stack was also analysed. Values obtained numerically have been compared with those obtained experimentally and a good agreement is observed between them. These results are useful for estimating the performance of the bipolar stack.

Keywords

Bipolar electrodes Current distribution Electrochemical reactors Laplace equation Leakage current 

List of symbols

a

Geometric parameter of the manifold (m)

A

Transverse section of the electrolyte manifold (m2)

b

Geometric parameter of the manifold (m)

\({\overline d_{\rm r} }\)

Mean relative deviation (%)

e

Interelectrode gap (m)

G

Length of the electrolyte manifold (m)

j

Current density (A m−2)

jmean

Mean current density (A m−2)

I

Total current (A)

I*

Leakage current (A)

IB

Total current at the bipolar electrode (A)

L

Electrode length (m)

n

Number of bipolar electrodes

N

Number of experimental values in Eq. 7

R

By-pass resistance (Ω)

U

Applied voltage to the reactor (V)

UA

Potential at the terminal anode (V)

UC

Potential at the terminal cathode (V)

W

Electrode width (m)

x

Axial coordinate (m)

y

Axial coordinate (m)

z

Normalized y axial coordinate = y/L

Greek characters

ϕ

Potential in the solution phase (V)

λ

Dimensionless number given by Eq. 6

ρ

Electrolyte resistivity (Ω m)

σ

Standard deviation

Subscripts

A

Terminal anode

Bk

kth bipolar electrode

C

Terminal cathode

Notes

Acknowledgements

This work was supported by the Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Universidad Nacional del Litoral (UNL) of Argentina.

References

  1. 1.
    Rousar I (1969) J Electrochem Soc 116:676CrossRefGoogle Scholar
  2. 2.
    Rousar I, Cezner V (1974) J Electrochem Soc 121:648Google Scholar
  3. 3.
    Katz M (1978) J Electrochem Soc 125:515CrossRefGoogle Scholar
  4. 4.
    Burnett JC, Danly DE (1979) AIChE Symp Ser 75:8Google Scholar
  5. 5.
    Khun AT, Booth JS (1980) J Appl Electrochem 10:233CrossRefGoogle Scholar
  6. 6.
    Thiele W, Schleiff M, Matschiner H (1981) Electrochim Acta 26:1005CrossRefGoogle Scholar
  7. 7.
    Kaminski EA, Savinell RF (1983) J Electrochem Soc 130:1103CrossRefGoogle Scholar
  8. 8.
    White RE, Walton CW, Burney HS, Beaver RN (1986) J Electrochem Soc 133:485CrossRefGoogle Scholar
  9. 9.
    Seiger HN (1986) J Electrochem Soc 133:2002CrossRefGoogle Scholar
  10. 10.
    Comninellis Ch, Plattner E, Bolomey P (1991) J Appl Electrochem 21:415CrossRefGoogle Scholar
  11. 11.
    Bonvin G, Comninellis Ch (1994) J Appl Electrochem 24:469CrossRefGoogle Scholar
  12. 12.
    Rangarajan SK, Yegnanarayanan V (1997) Electrochim Acta 42:153CrossRefGoogle Scholar
  13. 13.
    Divisek J, Jung R, Britz D (1990) J Appl Electrochem 20:186CrossRefGoogle Scholar
  14. 14.
    Bonvin G (1992) Swiss Federal Institute of Technology, Lausanne, thesis 1029Google Scholar
  15. 15.
    Rousar I, Thonstad J (1994) J Appl Electrochem 24:1124CrossRefGoogle Scholar
  16. 16.
    Henquín ER, Bisang JM (2005) J Appl Electrochem 35:1183CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, Inc. 2007

Authors and Affiliations

  1. 1.Programa de Electroquímica Aplicada e Ingeniería Electroquímica (PRELINE)Facultad de Ingeniería Química (UNL)Santa FeArgentina

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