Experimental and theoretical study on reduced gas holdup with increasing gas flux in a millimeter-micrometer dual-sized bubble column

IF 3.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design Pub Date : 2025-10-03 DOI:10.1016/j.cherd.2025.10.001

Kaixiang Wang, Bo Liu, Tao Wu, Qiang Yang, Fang Yuan

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引用次数: 0

Abstract

Bubble column reactors are widely used in industrial applications due to their excellent mass and heat transfer capabilities, where the critical parameter gas holdup is significantly influenced by interactions between bubbles of different sizes. This study investigates the effect of dual-sized bubble interaction on gas holdup in coalescence-inhibited systems. A quantitative comparison between dual-sized and single-sized systems reveals that micrometer-sized bubbles primarily contribute to gas holdup. A non-monotonic trend in system gas holdup is observed when millimeter-sized bubbles are gradually introduced into a fixed micro-bubble system. To explain the phenomenon, a coupled drift-flux model is developed to relate the intermediate decline in gas holdup to the enhanced velocity of micro-bubbles through dual-sized bubble interactions. These findings provide new insights for optimizing bubble column systems, particularly in applications requiring high gas flux and improved gas-liquid mass transfer, such as in wastewater oxidation, 1,4-Butanediol synthesis, and electrolysis processes.

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毫米-微米双尺寸气泡塔中随气体通量增加而降低气含率的实验与理论研究

气泡塔反应器因其优异的传质和传热能力而广泛应用于工业应用，其中不同尺寸气泡之间的相互作用对关键参数气含率有显著影响。本研究探讨了双尺寸气泡相互作用对聚结抑制体系中气体含率的影响。双尺寸和单尺寸系统的定量比较表明，微米尺寸的气泡主要对气含率有贡献。在固定的微泡系统中逐渐引入毫米级气泡后，系统气含率呈现非单调趋势。为了解释这一现象，建立了一个耦合漂移通量模型，将气含率的中间下降与微气泡通过双尺寸气泡相互作用而增强的速度联系起来。这些发现为优化气泡柱系统提供了新的见解，特别是在需要高气体通量和改进气液传质的应用中，例如废水氧化，1,4-丁二醇合成和电解过程。

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来源期刊

Chemical Engineering Research & Design 工程技术-工程：化工

CiteScore

6.10

自引率

7.70%

发文量

623

审稿时长

42 days

期刊介绍： ChERD aims to be the principal international journal for publication of high quality, original papers in chemical engineering. Papers showing how research results can be used in chemical engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in plant or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of traditional chemical engineering.