文献类型：期刊文献

英文题名：Gas holdup at dynamic equilibrium region of a bubble column: Effect of bubble generator performance

作者：Gong, Chun-Kai[1];Xu, Xiao[1];Yang, Qiang[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：443

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20221712032240);WOS:【SCI-EXPANDED(收录号:WOS:000800405500007)】；

基金：The authors wish to express their sincere gratitude to the National Key R&D Program of China (2018YFC1801904, 2018YFC1802704), National Natural Science Foundation of China (51678238, 51722806, 21908057), and Shanghai Sailing Program (19YF1411800) for financial support. This project was also sponsored by "Chenguang Program" supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission (20CG39).

语种：英文

外文关键词：Gas holdup; Initial bubble size; Bubble column; Flow regime transition; Bubble generator

摘要：Gas holdup along with the superficial gas velocity was systematically investigated in a lab-scale bubble column. The experiments were conducted in a bubble column with a height of 6 m at superficial gas velocity of 0.01-0.13 m/s. Experimental results show that dynamic equilibrium region was achieved at a distance of 2800 mm above the bubble generator. Small initial bubble size will lead to higher gas holdup and slump trend. To overcome the trade-off between sufficient gas holdup and slump trend, a reasonable gas holdup without slump can be obtained by controlling the liquid mass flow in the nozzle. Based on previous empirical correlations and experiment data, a semi empirical correlation of gas holdup was established consider the flow regime transition and bubble generator performance. The semi empirical correlation in this work gives a fairly accurate prediction while several empirical coefficients were used.