Skip to main content
SpringerLink
Log in

Effects of gas bubbles on the concentration profiles and conversion efficiency of three-dimensional packed-bed electrodes

  • Original Paper
  • Published:
Journal of Solid State Electrochemistry Aims and scope Submit manuscript

Abstract

The effects of evolving gas bubbles on the concentration profile and conversion efficiency of three-dimensional packed-bed electrode was simulated for the first time, taking account of material balance, bubble, ohmic, kinetic, and mass transfer effects. The model produced different dimensionless groups and parameters that control the behavior of the packed-bed electrode under potentiostatic conditions. The effects of the different groups on the conversion efficiency, concentration, polarization, and current profiles were studied. Higher conversion efficiency were obtained at higher values of ω \(\left( {\omega = \frac{{I_0 L}}{{nFDC_b }}} \right)\), lower values of δ \(\left( {\delta = \frac{{\upsilon L}}{D}} \right)\) and higher values of the bubble group, ξ (\(\xi = \frac{{\upsilon \gamma }}{{I_o }}\)). Gas bubble formation retarded the operation at higher conversion efficiency. In presence of gas bubble, lower values of δ were required to obtain as much as conversion efficiency obtained when the gas bubble formation is absent. Also, the bubble formation retarded the operation at lower flow rates as it causes lower obtainable current and non-uniform distributions of the currents. A case study was introduced for understanding the separate important operating conditions, e.g., flow rate. Account of gas bubble effects on the concentration profiles for such system is crucial.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12

Similar content being viewed by others

Chapter © 2012

References

  1. Pilonea D, Kelsal GHL (2006) J Electrochem Soc 153:D85

    Article  Google Scholar 

  2. Trainham JA, Newman J (1977) J Electrochem Soc 124:1528

    Article  CAS  Google Scholar 

  3. Cheng CY, Kelsall GH, Pilone D (2005) J Appl Electrochem 35:1191

    Article  CAS  Google Scholar 

  4. Ateya BG (1977) J Electroanal Chem 76:183

    Article  CAS  Google Scholar 

  5. Naval JL, Oropeza M T, Ponce de León C, González-García J, Frías-Ferrer A J (2007) Hydrometal, in press

  6. Ateya GB, El-Anadouli B (1991) J Electrochem Soc 138:1331

    Article  CAS  Google Scholar 

  7. Saleh MM (1999) Electrochim Acta 45:959

    Article  CAS  Google Scholar 

  8. Jha K, Weidner JW (1999) J Appl Electrochem 29:130

    Article  Google Scholar 

  9. Saleh MM (2004) J Phys. Chem B 108:13419

    Article  CAS  Google Scholar 

  10. Saleh MM, Weidner JW, Ateya BG (1995) J Electrochem Soc 142:4122

    Article  CAS  Google Scholar 

  11. Saleh MM (2007) J Solid-Satate Electrochem 11:811

    Article  CAS  Google Scholar 

  12. Szpyrkowicz L, Daniele S, Radaelli M, Specchia S (2006) Appl Cat B: Environmental 66:40

    Article  CAS  Google Scholar 

  13. Tada K, Kawaguchi T, Shimazu K (2004) J Electroanal Chem 572:93

    Article  CAS  Google Scholar 

  14. Awad MI, Saleh MM, Ohsaka T (2006) J Electrochem Soc 153:D207

    Article  CAS  Google Scholar 

  15. Ateya BG, Austin L (1977) J Electrochem Soc 124:1540

    Article  CAS  Google Scholar 

  16. Maltoz M, Newman J (1986) J Elecrochem Soc 133:1850

    Article  Google Scholar 

  17. Alkire R, Gracon B (1975) J Electrochem Soc 122:1594

    Article  CAS  Google Scholar 

  18. Alkire R, Gracon B (1976) J Electrochem Soc 123:1842

    Article  CAS  Google Scholar 

  19. Saleh MM, Weidner JW, Ateya BG (1995) J Electrochem Soc 142:4113

    Article  CAS  Google Scholar 

  20. Cussler LE (1984) Diffusion and mass transfer. Cambridge University Press, Cambridge, p 230

    Google Scholar 

  21. Meredith RE, Tobias CW (1962) In: Gerischer H, Tobias CW (eds) Advances in electrochemistry and electrochemical engineering. vol. 2. Wiley, New York, pp 17–48

    Google Scholar 

  22. De Vidts P, White RE (1997) J Electrochem Soc 144:1343

    Article  Google Scholar 

  23. Newman J (1991) Electrochemical Systems, 2nd ed. Prentice-Hall, Englewood Cliffs, p 552

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Chemistry Department, Faculty of Science, Cairo University, Cairo, Egypt

    Mahmoud M. Saleh

Authors
  1. Mahmoud M. Saleh
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Mahmoud M. Saleh.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Saleh, M.M. Effects of gas bubbles on the concentration profiles and conversion efficiency of three-dimensional packed-bed electrodes. J Solid State Electrochem 13, 343–351 (2009). https://doi.org/10.1007/s10008-008-0545-z

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10008-008-0545-z

Keywords

Search

Navigation