Prediction of the volumetric mass transfer coefficient in pneumatic contactors

Bello, R. Ade; Robinson, Campbell W.; Moo‐Young, Murray

doi:10.1016/0009-2509(85)85046-6

Cited by 70 publications

(33 citation statements)

References 10 publications

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“…The effect of alcohols on k L a was due to affecting the gas holdup. This result is supported by the literature [13,16,18,19] although El Azher et al [28] and Dhaoudi [44] reported contradictory results. The reason is that alcohol adsorption at the air-water interface reduces the mass transfer coefficient (k L ).…”

Section: Gas-liquid Mass Transfersupporting

confidence: 71%

Gas‐Liquid Hydrodynamics and Mass Transfer in Aqueous Alcohol Solutions in a Split‐Cylinder Airlift Reactor

2011

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The influences of aliphatic alcohols (C n H 2n+1 OH, n = 1-4) and their concentrations (0-1 vol.-%) on gas holdup, liquid circulation velocity, mixing time, and overall volumetric gas-liquid oxygen mass transfer coefficient were considered in a split-cylinder airlift reactor sparged with air. The carbon chain length of the alcohols and their concentration affect the airlift reactor performance. Alcohols reduced the average bubble sizes and increased the gas holdup, the interfacial area for mass transfer, and the gas-liquid mass transfer coefficient. Since butanol has the most carbon atoms in its chain, it had the most significant effect on gas holdup and mass transfer enhancement. It also decreased the liquid circulation velocity by surface tension reduction. Two correlations based on dimensionless groups were applied to investigate the effect of hydrodynamics and molecules on gas holdup and mass transfer. A satisfactory agreement between correlation and experimental results was observed.

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Section: Gas-liquid Mass Transfersupporting

confidence: 71%

Gas‐Liquid Hydrodynamics and Mass Transfer in Aqueous Alcohol Solutions in a Split‐Cylinder Airlift Reactor

2011

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“…The exponential dependence of <Pgr on (1 +Ad/Ar) in the present model is rather stronger compared with that in the correlation of Chisti et ai. l7] but it is weaker than that in the correlation of Bello et al [8]. It is seen that Equation (2) agrees satisfactorily with the data.…”

Section: Hydrodynamics and Oxygen Transfer In External-loop Airlift Bsupporting

confidence: 84%

Design and Scale-up of External-Loop Airlift Bioreactor

Kawase

1994

Advances in Bioprocess Engineering

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“…The total gas hold-up was measured as well. The measured values were fitted with the semi-empirical correlations originally derived by Bello et al [10]. Finally, a comparison of the fitted parameters involved in the correlation describing the measured values was done.…”

Section: Subscriptsmentioning

confidence: 99%