Hydrodynamics and mass transfer performance of gas–liquid two‐phase flow in a high‐throughput chaotic microreactor

Microbubbles have been widely applied in various fields. Here, an oscillating feedback microreactor (OFM) was designed to produce microbubbles at high throughput (5–80 mL/min), where the hydrodynamics and mass transfer performance of gas–liquid two‐phase system were investigated. The hydrodynamics r...

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Bibliographic Details
Published in:AIChE journal 2025-03, Vol.71 (3), p.n/a
Main Authors: Zhang, Jia‐Ni, Tong, Hao‐Tian, Shi, Zu‐Chun, Xie, Ting‐Liang, Liu, Qiang, Wei, Shi‐Xiao, Yin, Shuang‐Feng
Format: Article
Language:English
Subjects:
bubble size distribution
chaotic microreactor
Dimensionless numbers
Feedback
Flow rates
Flow velocity
Fluid dynamics
Fluid flow
high throughput
Hydrodynamics
Liquid flow
Liquid phases
Mass transfer
microbubble
Microreactors
Reynolds number
Secondary flow
Vapor phases
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Summary:Microbubbles have been widely applied in various fields. Here, an oscillating feedback microreactor (OFM) was designed to produce microbubbles at high throughput (5–80 mL/min), where the hydrodynamics and mass transfer performance of gas–liquid two‐phase system were investigated. The hydrodynamics results showed that three secondary flows (oscillation, vortex, and feedback) could be effectively generated for inducing chaotic flow in the OFM, and the gas phase could be effectively broken up into small microbubbles. The bubble size was more sensitive to the liquid phase flow rate than the gas phase. Two dimensionless prediction formulas for bubble Sauter size were proposed based on gas–liquid flow ratio and Reynolds number at different liquid flow rates. The mass transfer experiments showed that the volumetric average mass transfer coefficient kLa was 1–3 orders of magnitude higher than those of conventional reactors.
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.18657