| 三维菱形结构微通道内气液传质与强化 |
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| 引用本文： | 陈一宇,朱春英,付涛涛,马友光.三维菱形结构微通道内气液传质与强化[J].化工学报,2022,73(1):175-183. |
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| 作者姓名： | 陈一宇 朱春英 付涛涛 马友光 |
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| 作者单位： | 天津大学化工学院，化学工程联合国家重点实验室，天津 300072 |
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| 基金项目： | 国家自然科学基金项目(21776200)； |
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| 摘 要： | 研究了具有三维交错菱形结构的微通道对离子液体1-丁基-3-甲基咪唑四氟硼酸盐(Bmim]BF4])水溶液吸收CO2过程的传质增强作用。实验主要聚焦于弹状流和破碎弹状流。考察了弹状流型下气液流量、离子液体浓度对体积传质系数kLa、增强因子E、CO2吸收率X及压力降ΔP的影响。结果表明，较之于直通道，三维菱形通道可以显著提高体积传质系数和CO2吸收率，其增强因子可达2.1，压力降仅增加 0.9 kPa。提出了一个新的体积传质系数kLa预测式，预测效果良好。采用VOF法模拟了微通道内气液两相流动过程，获得了连续相的速度矢量场。三维菱形通道能诱导涡流，强化传质过程。
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| 关 键 词： | 微通道 离子液体 传质强化 二氧化碳 气液两相流 |
| 收稿时间： | 2021-07-06 |
Gas-liquid mass transfer and intensification in 3D-rhombus microchannel |
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| CHEN Yiyu,ZHU Chunying,FU Taotao,MA Youguang.Gas-liquid mass transfer and intensification in 3D-rhombus microchannel[J].Journal of Chemical Industry and Engineering(China),2022,73(1):175-183. |
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| Authors: | CHEN Yiyu ZHU Chunying FU Taotao MA Youguang |
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| Affiliation: | State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China |
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| Abstract: | 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. |
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| Keywords: | microchannel ionic liquid mass transfer enhancement carbon dioxide gas-liquid two-phase flow |
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