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Hydrodynamics and mass transfer performance in packed microbubble column reactor.

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Bibliographic Details
Title:	Hydrodynamics and mass transfer performance in packed microbubble column reactor.
Authors:	Xie, Bingqi¹ (AUTHOR), Ma, Wangyang^1,2 (AUTHOR), Gao, Yufeng¹ (AUTHOR), Chen, Yi¹ (AUTHOR), Liu, Wei¹ (AUTHOR), Zhang, Jisong¹ (AUTHOR) jiszhang@tsinghua.edu.cn
Source:	AIChE Journal. Jun2026, Vol. 72 Issue 6, p1-14. 14p.
Subjects:	Mass transfer, Bubble column reactors, Packed bed reactors, Bubble dynamics, Multiphase flow, Mass transfer coefficients, Hydrodynamics
Abstract:	Microbubbles, characterized by small size, slow rising velocity, and long existence time compared to large bubbles, have been introduced into traditional packed bubble column reactors to achieve process intensification in gas–liquid–solid multiphase systems. In this work, the bubble flow behaviors within packed microbubble column reactor are visualized and analyzed by varying reactor length, packing size, gas/liquid superficial velocity, and liquid viscosity. The results show that larger packing size promotes the stable existence of microbubble swarms, thereby increasing the gas–liquid interfacial area and enhancing mass transfer efficiency. Moreover, a comparative analysis of porous and non‐porous packing materials reveals that, although porous packings provide higher liquid holdup, they hinder microbubble stability and result in lower volumetric mass transfer coefficients (kLa). Ultimately, the empirical correlations for kLa were developed, exhibiting excellent agreement with the experimental data. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	Microbubbles, characterized by small size, slow rising velocity, and long existence time compared to large bubbles, have been introduced into traditional packed bubble column reactors to achieve process intensification in gas–liquid–solid multiphase systems. In this work, the bubble flow behaviors within packed microbubble column reactor are visualized and analyzed by varying reactor length, packing size, gas/liquid superficial velocity, and liquid viscosity. The results show that larger packing size promotes the stable existence of microbubble swarms, thereby increasing the gas–liquid interfacial area and enhancing mass transfer efficiency. Moreover, a comparative analysis of porous and non‐porous packing materials reveals that, although porous packings provide higher liquid holdup, they hinder microbubble stability and result in lower volumetric mass transfer coefficients (kLa). Ultimately, the empirical correlations for kLa were developed, exhibiting excellent agreement with the experimental data. [ABSTRACT FROM AUTHOR]
ISSN:	00011541
DOI:	10.1002/aic.70340