文献类型：期刊文献

英文题名：Volatility induces early flow regime transition in bubble columns

作者：Liu, Yuxi[1];Jiang, Rui[2];Wang, Kaixiang[1];Zhang, Lanteng[1];Xu, Xiao[1];Liu, Bo[1];Yang, Qiang[1]

机构：[1]East China Univ Sci & Technol, Dept Mech & Power Engn, Shanghai, Peoples R China;[2]SINOPEC Dalian Res Inst Petr & Petrochem Co Ltd, Dalian, Peoples R China

年份：2026

卷号：330

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20261420443393);WOS:【SCI-EXPANDED(收录号:WOS:001734665700001)】；

基金：This work was financially supported by the National Key Research and Development Program of China (Grant.No.2022YFE0130000-03) , the National Natural Science Foundation of China (Grant. Nos.52025103,22178099) , the Shanghai Natural Science Foundation (Grant.No.21ZR1417000) , and the Shanghai Pilot Program for Basic Research (Grant. No. 22TQ1400100-11) .

语种：英文

外文关键词：Bubble column; Liquid volatility; Flowregimetransition; Bubble collision dynamics

摘要：Liquid volatility is a fundamental property of gas-liquid systems and is particularly relevant in high-temperature processes, yet its hydrodynamic implications in bubble columns remain largely unexplored. In this work, we investigate the impact of liquid volatility on gas holdup and flow regime transition in a bubble column by employing n-pentane, n-hexane, and their binary mixtures, which share comparable viscosity and surface tension but different saturated vapor pressures. We found that increasing volatility significantly enhances gas holdup in the homogeneous regime, which is well described by corrected superficial gas velocity, Ug,vapor= Ug* Pa Pa-Pv, accounting for vapor generation based on Dalton's law. More importantly, this work demonstrates that higher volatility induces an earlier regime transition from homogeneous to heterogeneous flow. As the saturated vapor pressure increases from 19 to 58 kPa, the critical gas velocity Ug,trans decreases from 3.39 cm/s to 1.27 cm/s. Bubble dynamics analysis indicates that, although the intrinsic bubble coalescence efficiency remains essentially unchanged, increased volatility intensifies the lateral oscillations of rising bubbles. This may enhance bubble-bubble encounter probability and promote the early formation of large, fast-rising bubbles, thereby determining the flow regime. These findings establish a direct link between liquid volatility and flow regime stability in bubble columns, provide guidance for industrial bubble column operation involving high-temperature or volatile-liquid conditions.