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Article

Gas–Liquid Mass Transfer around a Rising Bubble: Combined Effect of Rheology and Surfactant

Toulouse Biotechnology Institute, Université de Toulouse, CNRS, INRAE, INSA, 135 Avenue de Rangueil, 31077 Toulouse, France
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Academic Editor: Rufat Abiev
Fluids 2021, 6(2), 84; https://doi.org/10.3390/fluids6020084
Received: 20 January 2021 / Revised: 9 February 2021 / Accepted: 10 February 2021 / Published: 15 February 2021
(This article belongs to the Special Issue Flow and Heat Transfer Intensification in Chemical Engineering)
The influence of viscosity and surface tension on oxygen transfer was investigated using planar laser-induced fluorescence with inhibition (PLIF-I). The surface tension and the viscosity were modified using Triton X-100 and polyacrylamide, respectively. Changes in the hydrodynamic parameters of millimetric bubbles were identified, and transfer parameters were calculated. The results revealed a decrease in the mass transferred in the presence of a contaminant. For modified viscosity, the decrease in mass transferred was allowed for by current correlations, but the presence of surfactant led to a sharp decrease in the liquid side mass transfer coefficient, which became even lower when polymer was added. An explanation for the gap between classical correlations and experimental values of kL is discussed, and a hypothesis of the existence of an accumulation of contaminant in the diffusion layer is proposed. This led to the possibility of a decrease in the diffusion coefficient and oxygen saturation concentration in the liquid film, explaining the discrepancy between models and experience. Adapted values of DO2 and [O2] * in this layer were estimated. This original study unravels the complexity of mass transfer from an air bubble in a complex medium. View Full-Text
Keywords: mass transfer; bubble; gas–liquid; surfactant; rheology mass transfer; bubble; gas–liquid; surfactant; rheology
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MDPI and ACS Style

Lebrun, G.; Xu, F.; Le Men, C.; Hébrard, G.; Dietrich, N. Gas–Liquid Mass Transfer around a Rising Bubble: Combined Effect of Rheology and Surfactant. Fluids 2021, 6, 84. https://doi.org/10.3390/fluids6020084

AMA Style

Lebrun G, Xu F, Le Men C, Hébrard G, Dietrich N. Gas–Liquid Mass Transfer around a Rising Bubble: Combined Effect of Rheology and Surfactant. Fluids. 2021; 6(2):84. https://doi.org/10.3390/fluids6020084

Chicago/Turabian Style

Lebrun, Gaelle, Feishi Xu, Claude Le Men, Gilles Hébrard, and Nicolas Dietrich. 2021. "Gas–Liquid Mass Transfer around a Rising Bubble: Combined Effect of Rheology and Surfactant" Fluids 6, no. 2: 84. https://doi.org/10.3390/fluids6020084

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