Ferreira, António

Teixeira, J. A.

Universidade do Minho: RepositoriUM

 CENTRE OF BIOLOGICAL ENGINEERING UNIVERS IDADE  DO  MINHO  Centre of Biological Engineering,  Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal Tel +351 253 604 400 | Fax + 351 253 678 986       www.ceb.uminho.pt      Mixing and mass transfer in gas-liquid-solid systems  A. Ferreira, José Teixeira  IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.  The wide application of gas–liquid–solid systems in various industrial processes such as chemical, petrochemical, biochemical and environmental is a strong evidence of their increasing importance and, as a consequence,  many research groups working with bubble columns, fluidized beds, airlift reactors, bubbly flows and flotation columns, are interested in their study.  Despite all the research efforts, the knowledge about the effects of solids on gas–liquid system and the respective physical mechanisms are not yet clarified. A clear understanding of the hydrodynamics of the gas–liquid–solid systems is needed to improve the design and operation of the processes involving these systems. This is particularly true in the field of bioengineering where three-phase flow reactors, such as three-phase airlift reactors with immobilized biomass, are encountered. The presence of the solid phase can influence the gas–liquid mixture in different ways such as bubble rise and formation, radial and axial profiles, mixing and dispersion, gas holdup and flow regimes and mass transfer.  Results on the effect of the solid phase on regime transition and mass transfer properties in g-l-s systems [1] together with the development of measurement techniques [2] that allow a better insight of the local flow structure and a better understanding of the various interactions between phases will be presented.  [1] P.C. Mena, M.C. Ruzicka, F.A. Rocha, J.A. Teixeira, J. Drahoš “Effect of solids on homogeneous–heterogeneous flow regime transition in bubble columns”, Chemical Engineering Science, Volume 60, Issue 22, November 2005, Pages 6013-6026 [2] P.C. Mena, F.A. Rocha, J.A. Teixeira, P. Sechet, A. Cartellier, “Measurement of gas phase characteristics using a monofibre optical probe in a three-phase flow”, Chemical Engineering Science, Volume 63, Issue 16, August 2008, Pages 4100-4115     

Mixing and mass transfer in gas-liquid-solid systems

 
CENTRE OF BIOLOGICAL ENGINEERING 
UNIVERS IDADE  DO  MINHO
  
Centre of Biological Engineering,  
Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal 
Tel +351 253 604 400 | Fax + 351 253 678 986       www.ceb.uminho.pt 
 
 
 
 
 
Mixing and mass transfer in gas-liquid-solid systems 
 
A. Ferreira, José Teixeira 
 
IBB-Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, 
Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal. 
 
The wide application of gas–liquid–solid systems in various industrial processes such as chemical, 
petrochemical, biochemical and environmental is a strong evidence of their increasing importance 
and, as a consequence,  many research groups working with bubble columns, fluidized beds, airlift 
reactors, bubbly flows and flotation columns, are interested in their study. 
 
Despite all the research efforts, the knowledge about the effects of solids on gas–liquid system and 
the respective physical mechanisms are not yet clarified. A clear understanding of the hydrodynamics 
of the gas–liquid–solid systems is needed to improve the design and operation of the processes 
involving these systems. This is particularly true in the field of bioengineering where three-phase flow 
reactors, such as three-phase airlift reactors with immobilized biomass, are encountered. The 
presence of the solid phase can influence the gas–liquid mixture in different ways such as bubble rise 
and formation, radial and axial profiles, mixing and dispersion, gas holdup and flow regimes and mass 
transfer. 
 
Results on the effect of the solid phase on regime transition and mass transfer properties in g-l-s 
systems [1] together with the development of measurement techniques [2] that allow a better insight 
of the local flow structure and a better understanding of the various interactions between phases will 
be presented. 
 
[1] P.C. Mena, M.C. Ruzicka, F.A. Rocha, J.A. Teixeira, J. Drahoš “Effect of solids on 
homogeneous–heterogeneous flow regime transition in bubble columns”, Chemical 
Engineering Science, Volume 60, Issue 22, November 2005, Pages 6013-6026 
[2] P.C. Mena, F.A. Rocha, J.A. Teixeira, P. Sechet, A. Cartellier, “Measurement of gas 
phase characteristics using a monofibre optical probe in a three-phase flow”, Chemical 
Engineering Science, Volume 63, Issue 16, August 2008, Pages 4100-4115 
 
 
 
 


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Mixing and mass transfer in gas-liquid-solid systems

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