Experimental study on gas-liquid dispersion and mass transfer in shear-thinning system with coaxial mixer

被引：18
作者：
Liu, Baoqing [1 ]
Zheng, Yijun [1 ]
Cheng, Ruijia [1 ]
Xu, Zilong [1 ]
Wang, Manman [1 ]
Jin, Zhijiang [1 ]
机构：
[1] Zhejiang Univ, Coll Energy Engn, Inst Proc Equipment, Hangzhou 310027, Zhejiang, Peoples R China
来源：
CHINESE JOURNAL OF CHEMICAL ENGINEERING | 2018年 / 26卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Non-Newtonian fluids; Coaxial mixer; Gas holdup; Relative power demand; Mass transfer; ELECTRICAL-RESISTANCE TOMOGRAPHY; EVOLVING MODEL FLUIDS; DUAL MIXING SYSTEMS; STIRRED VESSEL; BIOREACTOR; IMPELLERS; RUSHTON; HOLDUP; TANK; FLOW;
D O I：
10.1016/j.cjche.2018.02.009
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The effects of impeller type, stirring power, gas flow rate, and liquid concentration on the gas-liquid mixing in a shear-thinning system with a coaxial mixer were investigated by experiment, and the overall gas holdup, relative power demand, and volumetric mass transfer coefficient under different conditions were compared. The results show that, the increasing stirring power or gas flow rate is beneficial in promoting the overall gas holdup and volumetric mass transfer coefficient, while the increasing system viscosity weakens the mass transfer in a shearing-thinning system. Among the three turbines, the six curved-blade disc turbine (BDT-6) exhibits the best gas pumping capacity; the six 45 degrees pitched-blade disc turbine (PBDT-6) has the highest volumetric mass transfer coefficient at the same unit volume power. (C) 2018 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.
引用
收藏
页码：1785 / 1791
页数：7
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