Enhancement effect and mechanism of gas-liquid mass transfer by baffles embedded in the microchannel

被引：38

作者：

Yin, Yaran ^{[1
]}

Zhu, Chunying ^{[1
]}

Fu, Taotao ^{[1
]}

Ma, Youguang ^{[1
]}

Wang, Kai ^{[2
]}

Luo, Guangsheng ^{[2
]}

机构：

[1] Tianjin Univ, Sch Chem Engn & Technol, State Key Lab Chem Engn, Tianjin 300072, Peoples R China

[2] Tsinghua Univ, Dept Chem Engn, State Key Lab Chem Engn, Beijing 100084, Peoples R China

来源：

CHEMICAL ENGINEERING SCIENCE | 2019年 / 201卷

关键词：

Mass transfer enhancement; Microchannel; Gas-liquid two-phase; Baffle; Enhancement factor; CO2; ABSORPTION; CARBON-DIOXIDE; AQUEOUS-SOLUTIONS; HEAT-TRANSFER; TAYLOR FLOW; SLUG FLOW; CAPTURE; MONOETHANOLAMINE; PERFORMANCE; REACTORS;

D O I：

10.1016/j.ces.2019.02.039

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The enhancement of gas-liquid mass transfer by baffles embedded in a microchannel was investigated experimentally for CO2 absorption into monoethanolamine/1-butyl-3-methylimidazolium tetrafluoroborate (MEA/Bmim][BF4]) aqueous solutions. The influences of baffle size on mass transfer rate and pressure drop were studied through varying the MEA/[Bmim][BE4] concentration ratio, gas-liquid flow rate and blockage ratio. Experimental results showed that the proper baffle configuration could improve effectively gas-liquid mass transfer performance. Although the pressure drop of the baffled microchannel has slight increase (the maximum growth 0.3 kPa, or 20% in relative term) in comparison with the unobstructed microchannel, it is acceptable for industrial application. Under lower MEA/[Bmim][BE4] concentration ratios, higher two-phase flow rates and blockage ratios, the mass transfer enhancement is more pronounced and the enhancement factor could reach to 1.5. A new empirical correlation of enhancement factor is proposed with good predictive performance. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：264 / 273

页数：10

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