文献类型：期刊文献

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

作者：Wang, Kaixiang[1];Liu, Bo[1];Wu, Tao[1];Yang, Qiang[1];Yuan, Fang[1]

机构：[1]East China Univ Sci & Technol, Dept Mech & Power Engn, 130 Meilong Rd,Lingyunlu St, Shanghai, Peoples R China

年份：2025

卷号：223

起止页码：228

外文期刊名：CHEMICAL ENGINEERING RESEARCH & DESIGN

收录：;EI(收录号：20254119309265);WOS:【SCI-EXPANDED(收录号:WOS:001593295900003)】；

基金：This work was financially supported by the National Key Research and Development Program of China (2022YFE0130000-03) , the Na-tional Natural Science Foundation of China (52025103, 22178099, 52200053) , and the Shanghai Pujiang Program (2023PJD025) .

语种：英文

外文关键词：Gas-liquid flow; Gas holdup; Dual-sized bubbles; Bubble interaction; Coalescence inhibition

摘要：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.