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Determination of local hydrodynamic parameters in bubble columns by the electrodiffusion method with oxygen as depolarizer

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Abstract

An electrodiffusional three-segment probe was developed with which local axial and radial liquid velocities can be determined. Application of this probe in gas-liquid flow yields information on local gas hold-up. In coalescing media the commonly used redox-system Fe(CN) 3−6 /Fe(CN) 46 should be replaced by dissolved oxygen as depolarizer. Measurements of local axial and radial liquid velocity and turbulence intensity in different bubble columns (D = 150 and 600 mm) showed good agreement with data obtained by hotfilm anemometry.

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Abbreviations

a, b, d, e, h, q :

coefficients

c :

concentration (mol m−3)

E :

potential, voltage (V)

f, g :

coefficients (µA, V)

I :

current (µA)

I/I 0 :

relative current

k, l :

coefficients (µA, W)

M :

measuring quantity (µA, W)

P :

power (W)

R0:

probe resistance (Ω)

S :

measuring signal (µA, V)

S 228 :

measuring signal at u = 228 cm s−1 (µA, V)

t :

time (s)

u :

liquid velocity (cm s−1)

u 1 :

turbulence intensity (cm s-1)

ū:

mean liquid velocity (cm s−1)

Θ:

flow angle (°)

Nu :

Nusselt number

Pr :

Prandtl number

Re :

Reynolds number

Sc :

Schmidt number

Sh :

Sherwood number

References

  1. T. Mizushina, Adv. Heat Transfer 7 (1971) 87.

    CAS  Google Scholar 

  2. W. Ranz, AIChE J. 4 (1958) 338.

    Article  CAS  Google Scholar 

  3. T. J. Hanratty, J. Appl. Electrochem. 21 (1991) 1038.

    Article  CAS  Google Scholar 

  4. J. Pauli, U. Onken and V. Sobolik,ibid. 21 (1991) 1073.

    Article  CAS  Google Scholar 

  5. V. E. Nakoryakov, O. N. Kashinsky and B. K. Kozmenko, in ‘Measuring Techniques in Gas-Liquid Two-Phase-Flows’, (edited by J. M. Delhaye and G. Cognet), Springer, Berlin (1983) p. 695.

    Google Scholar 

  6. V. Sobolik, J. Pauli and U. Onken, Exp. in Fluids 11 (1991) 186.

    CAS  Google Scholar 

  7. P. K. Adanuvor and R. E. White, J. Electrochem. Soc. 135 (1988) 2509.

    CAS  Google Scholar 

  8. J. Pauli, V. Sobolik and U. Onken, Chem. Eng. Sci. 46 (1991) 3302.

    CAS  Google Scholar 

  9. H. J. Kantorek, PhD thesis, University of Dortmund (1988).

  10. H. Kramers, Physica, New York 12 (1946) 61.

    CAS  Google Scholar 

  11. C. Deslouis, A. Ezzidi and B. Tribollet, J. Appl. Electrochem. 21 (1991) 1081.

    Article  CAS  Google Scholar 

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Authors and Affiliations

  1. Department of Chemical Engineering, Industrial Chemistry B, University of Dortmund, 44221, Dortmund, Germany

    S. Pannek, J. Pauli & U. Onken

Authors
  1. S. Pannek
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  2. J. Pauli
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  3. U. Onken
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Pannek, S., Pauli, J. & Onken, U. Determination of local hydrodynamic parameters in bubble columns by the electrodiffusion method with oxygen as depolarizer. J Appl Electrochem 24, 666–669 (1994). https://doi.org/10.1007/BF00252093

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  • DOI: https://doi.org/10.1007/BF00252093

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