Bubble size distribution and gas–liquid interfacial area in a modified downflow bubble column

Gas absorption in aqueous solutions with Tween 80 and absorption processes based on hydrodynamics and mass transfer is determined. The impact of surfactant concentration on gas holdup and gas-liquid interfacial area is analyzed, observing an increase of these parameters with surfactant concentration. The influence of liquid-phase contamination on the absorption process is investigated on the basis of the liquid-film mass transfer coefficient, removing the effect caused by the presence of a surfactant and the gas flow rate on the interfacial area and, thereby, on the volumetric mass transfer coefficient. The opposite effect on the mass transfer coefficient can be observed which decreases in the presence of the surfactant.

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“…the use of a similar equation taking into account the potential trend caused by these operation variables [18,19].…”

Section: Resultsmentioning

confidence: 99%

Effect of Tween 80 on Bubble Size and Mass Transfer in a Bubble Contactor

et al. 2011

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“…It is generally admitted that-in the homogeneous flow regime-d b increases [156] and, after the transition, "coalescence induced" bubbles appear, whereas the contribution of the "non-coalescence induced" bubbles remain constant [18]. Some authors reported an increase in d b with superficial gas velocity, both in the homogeneous and heterogeneous flow regimes [35,38,85,87,127,183,[232][233][234][235][236][237][238][239], while other authors reported no effect of U G over d b [188,240] and some others reported a decrease in the bubble size [241]. In the literature, both unimodal [239] and bimodal [242][243][244][245] BSD have been found depending on the gas sparger design and operating conditions.…”

Section: Superficial Gas Velocitymentioning

confidence: 96%

Two-Phase Bubble Columns: A Comprehensive Review

2018

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We present a comprehensive literature review on the two-phase bubble column; in this review we deeply analyze the flow regimes, the flow regime transitions, the local and global fluid dynamics parameters, and the mass transfer phenomena. First, we discuss the flow regimes, the flow regime transitions, the local and global fluid dynamics parameters, and the mass transfer. We also discuss how the operating parameters (i.e., pressure, temperature, and gas and liquid flow rates), the operating modes (i.e., the co-current, the counter-current and the batch modes), the liquid and gas phase properties, and the design parameters (i.e., gas sparger design, column diameter and aspect ratio) influence the flow regime transitions and the fluid dynamics parameters. Secondly, we present the experimental techniques for studying the global and local fluid dynamic properties. Finally, we present the modeling approaches to study the global and local bubble column fluid dynamics, and we outline the major issues to be solved in future studies.

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“…Several investigations on bubbling flows (Bouaifi et al, 2001;Majumder et al, 2006;Muroyama et al, 2013) express this rate of interfacial area as a function of the gas volumetric fraction and the maximum bubble size:…”

Section: Interfacial Areamentioning

confidence: 99%

Effect of path length on valve tray columns: Experimental study

Brahem

Royon-Lebeaud

Legendre

2015

Chemical Engineering Science

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Hydrodynamic and interfacial area measurements on two different size columns. Phenomenological correlations proposed for key design parameters. A non-negligible effect of the flow path length on mean emulsion profiles. a b s t r a c tExperimental measurements of hydrodynamic and interfacial area parameters are carried out over two rectangular pilot scale valve tray columns. The effect of tray path length on extrapolation between the two columns is studied and phenomenological correlations for hydrodynamic and interfacial area are proposed. Correlations are compared both to literature and to industrial results showing good agreement and a significant improvement for the prediction of industrial conditions. Discrepancies preventing an accurate description of industrial trends are highlighted through comparison between typical emulsion height profiles on both columns.

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Bubble size distribution and gas–liquid interfacial area in a modified downflow bubble column

Cited by 93 publications

References 16 publications

Effect of Tween 80 on Bubble Size and Mass Transfer in a Bubble Contactor

Effect of Tween 80 on Bubble Size and Mass Transfer in a Bubble Contactor

Two-Phase Bubble Columns: A Comprehensive Review

Effect of path length on valve tray columns: Experimental study

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