Gas-liquid mass transfer and intensification in 3D-rhombus microchannel

被引：0
|
作者：
Chen Y. [1 ]
Zhu C. [1 ]
Fu T. [1 ]
Ma Y. [1 ]
机构：
[1] State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin
来源：
Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 01期
关键词：
Carbon dioxide; Gas-liquid two-phase flow; Ionic liquid; Mass transfer enhancement; Microchannel;
D O I：
10.11949/0438-1157.20210929
中图分类号：
学科分类号：
摘要：
The effect of microchannels with three-dimensional interlaced diamond structures on the mass transfer enhancement of ionic liquid 1-butyl-3-methylimidazole tetrafluoroborate([Bmim][BF4])aqueous solution of CO2 absorption process was studied. The main flow regimes were slug flow and broken-slug flow in this study. The influences of the gas and liquid phase flow rates, the concentration of ionic liquid on the liquid side volumetric mass transfer coefficient kLa, enhancement factor E, CO2 absorption efficiency X and pressure drop ΔP were studied. Experimental results showed that 3D-rhombus microchannel could significantly improve the volumetric mass transfer coefficient and the absorption efficiency in comparison with the straight channel, and the enhancement factor could reach 2.1, while the increment of pressure drop is only 0.9 kPa. A new dimensionless empirical correlation for predicting kLa was proposed with good predicting performance. The volume of fluid (VOF) method was utilized to simulate gas-liquid two-phase flow to obtain the velocity vector contour distribution of continuous phase. The vortexes could be induced by the 3D-rhombus microchannel to enhance the mass transfer. © 2022, Editorial Board of CIESC Journal. All right reserved.
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页码：175 / 183
页数：8
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