Gas Holdup and Gas-Liquid Mass Transfer Investigations in an Oscillatory Flow in a Baffled Column

https://doi.org/10.22146/ajche.50797

Taslim Taslim(1*), Mohd Sobri Takriff(2)

(1) Department of Chemical and Process Engineering, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
(2) Department of Chemical and Process Engineering, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
(*) Corresponding Author

Abstract


Gas holdup and gas-liquid mass transfer were investigated in a vertical baffled column. Pure carbon dioxide (C02) was used as the dispersed phase and tap water was used as the continuous phase. Gas holdup and mass transfer rate of C02 were measured under semi-batch condition, while the liquid phase was measured in batch mode. Gas holdup was estimated as the volume fraction of the gas in the two-phase mixture in the column. Mass transfer was expressed in terms of the liquid-side volumetric mass transfer coefficient (kLa). The effects of oscillation frequency, oscillation amplitude and gas flow rate on gas holdup andmass transfer were also determined. The results showed that a significant increase in gas holdup and mass transfer could be achieved in an oscillatory baffled column compared to a bubble column. Gas holdup and mass transfer were correlated as a function of power density and superficial gas velocity. Keywords: gas holdup, mass transfer coefficient, power density, superficial gas velocity

Keywords


gas holdup, mass transfer coefficient, power density, superficial gas velocity

Full Text:

PDF


References

  1. Baird, M.H.I. & Stonestreet, P. "Energy Dissipation in Oscillatory Flow Within a Baffled Tube". Trans. I. ChemE., 73(A), 1995, 503-511.
  2. Baird, M.H.I., Rama Rao, N.V.& Stonestreet, P. "PowerDissipationand Holup in a Gassed ReciprocatingBaffle-PlateColumn".Trans. I. ChernE., 74(A), 1996,463-470.
  3. Bouaifi,M., Hebrard, G., Bastoul, D. & Roustan, M. "AComparative Study of Gas Holdup, Bubble Size, Interfacial Area and Mass TransferCoefficientsin Stirred Gas-Liquid Reactors and Bubble Columns". Chem. Eng. Processing, 40(2), 2001, 97-111.
  4. Brunold, C.R., Hunn, J.C.B., Mackley, M.R. & Thomson, J.W. "Experimental Observationson FlowPatterns and Energy Looses for Oscillatory Flow in Ducts Containing Sharp Edges". Chem. Eng. Sci., 44(5), 1989, 1227-1244.
  5. Deckwer,W.O., Burkhart, R. & Zoll, G. "Mixing and MassTransferintallbubble columns". Chem. Eng. Sci., 29(11), 1974, 2177- 2188.
  6. Dickens, A.W., Mackley, M.R. & William, H.R. "Experimental Residence Time Distribution Measurements for Unsteady Flow in BaffledTubes". Chem. Eng. Sci., 44(7), 1989, 1471-1479.
  7. Jealous, A.C. & Johnson, H.E "Power Requirements for Pulse Generation in Pulse Column". Ind. Eng. Chem., 47(6), 1955, 1159-1166.
  8. Hewgill, M.R., Mackley, M.R., Pandit, A.B. & Pannu, S.S. "Enhancement of Gas-Liquid Mass Transfer Using Oscillatory Flow in Baffled Tubes". Chem. Eng. Sci., 48(4), 1993, 799-803.
  9. Linek,V.,Benes, P.& Vacek,V."ACriticalReview and Experimental Verification of the Correct Used of the Dynamic Method for the Determination of Oxygen Transfer in Aerated Agitated Vessels to Water, ElectrolyteSolutions and ViscousFluids". Chem. Eng. J., 34, 1987, 11-34.
  10. Mackay, M.E.,. Mackley, M.R. & Wang, Y. "OscillatoryFlowwithinTubesContaining Wallor Central Baffles".Trans.I. ChemE., 71(A), 1991, 649-656.
  11. Mackley,M.R. "UsingOscillatoryFlowto Improve Performance". The Chemical Engineer. February, 1987, 18-20.
  12. Mackley, M.R. "Process Innovation Using Oscillatory Flow within Baffled Tubes". Trans.I. ChemE., 69(A), 1991, 197-199.
  13. Ni, X. & Gough, P. "On the Discussion of Dimensionless Groups Governing OscillatoryFlowina BaffledTube".Chem. Eng. Sci., 52(18), 1997,3209-3212.
  14. Robert, E.P.L. "The Simulation of Chaotic Advection for Application to Process Engineering". Trans. I. ChernE., 69 (A), 1991,208-210.
  15. Shah, Y.T., Deckwer, W.O., Kelkar, B.G. & Godbole, S.P. "Design Parameters Estimationsfor Bubble Column Reactors. AI.Ch.E.J., 28(3), 1982,353-379.



DOI: https://doi.org/10.22146/ajche.50797

Article Metrics

Abstract views : 2150 | views : 1035

Refbacks

  • There are currently no refbacks.


ASEAN Journal of Chemical Engineering  (print ISSN 1655-4418; online ISSN 2655-5409) is published by Chemical Engineering Department, Faculty of Engineering, Universitas Gadjah Mada.