Journal of Applied Electrochemistry

, Volume 9, Issue 1, pp 15–20 | Cite as

Packed-bed reactor with continuous recirculation of electrolyte

  • Dj. Matić
Article
  • 52 Downloads

Abstract

A comparison of calculated and experimental parameters for the packed-bed reactor working with recirculation of the electrolyte is given. A simple mathematical model was applied and the applicability of the relation
$$c = c^0 {\text{ exp(}} - k_1 At/V{\text{) for }}V_c \ll V_R $$
was tested. For the investigated reactor a dimensionless relation has been established from experimentalI-E curves for the single pass mode
$$(Sh) = 0 \cdot 5(Re)^{0 \cdot 7} (Sc)^{0 \cdot 33} .$$
For pure practical engineering requirements these two equations together give us a satisfactory way of predicting the concentration-time dependence.

Keywords

Physical Chemistry Mathematical Model Experimental Parameter Engineering Requirement Single Pass 

Symbols

a0

specific area of material of given geometry (cm−1)

A

electrode area (cm2)

As

specific area of electrode bed (cm−1)

c0

initial concentration in the bulk (mol cm−3)

ci

inlet concentration (mol cm−3)

co

outlet concentration (mol cm−3)

ct

concentration in the bulk after a given electrolysis time (mol cm−3)

de

equivalent diameter (cm)

D

diffusion coefficient (cm2s−1)

I/1

limiting current (A)

k1

mass transfer coefficient,I1zFAc0 (cm s−1)

L

height of electrode bed (cm)

R1

degree of conversion in single pass,I1/zFc0Q

Rf

final degree of conversion, corresponding to the final concentration in bulk of solution

(Re)

Reynolds Number,υde/ν

(Sc)

Schmidt Number,ν/D

(Sh)

Sherwood Number,k1de/D

t

time (s)

T

weight (g)

Q

volumetric flow rate (cm3s−1)

υ

linear flow velocity (cm s−1)

Vc

cell volume (cm3)

VR

reservoir volume (cm3)

V

total electrolyte volume (cm3)

ε

porosity

ν

kinematic viscosity (cm2s−1)

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References

  1. [l]
    R. W. Houghton and A. T. Kuhn,J. Appl. Electrochem. 4 (1974) 173.Google Scholar
  2. [2]
    D. J. Pickett,Electrochim. Acta 18 (1973) 835.Google Scholar
  3. [3]
    A. T. S. Walker and A. A. Wragg,ibid 22 (1977) 1129.Google Scholar
  4. [4]
    J. O'M. Bockris and S. Srinivasan, ‘Fuel Cells’, McGraw-Hill, New York (1969) p. 498.Google Scholar
  5. [5]
    A. T. Kuhn and B. Marquis,J. Appl. Electrochem. 2 (1972) 275.Google Scholar
  6. [6]
    D. Pickett,ibid 3 (1973) 343.Google Scholar
  7. [7]
    A. T. Kuhn and B. Marquis,ibid 3 (1973) 345.Google Scholar
  8. [8]
    R. E. Sioda,Electrochim. Acta 19 (1974) 57.Google Scholar
  9. [9]
    Idem, ibid 13 (1968) 375.Google Scholar
  10. [10]
    Idem, ibid 13 (1968) 1559.Google Scholar
  11. [11]
    D. Skansi, B. Lovreček, I. Lovreček and Dj. Matić, ‘Zbornik radova I Jugoslavenskog kongresa za hemisjsko inženjerstvo i procesnu tehniku’, Vol. II, Beograd (1971) p. 167.Google Scholar
  12. [12]
    R. E. Sioda,J. Appl. Electrochem. 5 (1975) 221.Google Scholar
  13. [13]
    Idem, J. Electroanalyt. Chem. 56 (1974) 149.Google Scholar
  14. [14]
    F. Goodridge and C. J. H. King, ‘Experimental Method and Equipment’ in ‘Techniques of Electroorganic Synthesis’ (ed. N. L. Weinberg) John Wiley, New York (1974).Google Scholar
  15. [15]
    B. Lovreček, D. Skansi and Dj. Matić,23rd Meeting of ISE, Stockholm (1972).Google Scholar
  16. [16]
    D. N. Bennion and J. Newman,J. Appl. Electrochem. 2 (1972) 113.Google Scholar
  17. [17]
    A. T. Kuhn and R. W. Houghton,ibid 4 (1974) 69Google Scholar
  18. [18]
    A. M. Johnson and J. Newman,J. Electrochem. Soc. 118 (1971) 510.Google Scholar
  19. [19]
    R. E. Meyer and F. A. Posey,J. Electroanalyt. Chem. 49 (1974) 377.Google Scholar
  20. [20]
    A. K. P. Chu, M. Fleischmann and G. J. Hills,J. Appl. Electrochem. 4 (1974) 323, 331.Google Scholar
  21. [21]
    G. Kreysa, S. Pionteck and E. Heitz,J. Appl. Electrochem. 5 (1975) 305.Google Scholar
  22. [22]
    P. J. van Duin, B. J. van Woesik,Proceedings of Symposium on Engineering Aspects of Electrochemical Synthesis, Yugoslavia, Dubrovnik, (1975) p. 9.Google Scholar
  23. [23]
    P. M. Robertson, F. Schwager and N. Ibl,J. Electroanalyt. Chem. 65 (1975) 883.Google Scholar

Copyright information

© Chapman and Hall Ltd. 1979

Authors and Affiliations

  • Dj. Matić
    • 1
  1. 1.Institute of Electrochemistry, Faculty of TechnologyUniversity of ZagrebYugoslavia

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