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题名: Hydrodynamics and mass transfer characteristics in gas-liquid flow through a rectangular microchannel
作者: Yue, Jun;  Chen, Guangwen;  Yuan, Quan;  Luo, Lingai;  Gonthier, Yves
关键词: microchannel ;  multiphase flow ;  mass transfer ;  absorption ;  pressure drop ;  process intensification
刊名: CHEMICAL ENGINEERING SCIENCE
发表日期: 2007-04-01
DOI: 10.1016/j.ces.2006.12.057
卷: 62, 期:7, 页:2096-2108
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Engineering, Chemical
研究领域[WOS]: Engineering
英文摘要: Researches on two-phase transfer and reaction processes in microchannnels are important to the design of multiphase microchemical systems. In the present work, hydrodynamics and mass transfer characteristics in cocurrent gas-liquid flow through a horizontal rectangular microchannel with a hydraulic diameter of 667 mu m have been investigated experimentally. Liquid side volumetric mass transfer coefficients were measured by absorbing pure CO2 into water and a 0.3 M NaHCO3 / 0.3M Na2CO3 buffer solution. Interfacial areas were determined by absorbing pure CO2 into a 1 M NaOH solution. Two-phase flow patterns and pressure drop data were also obtained and analyzed. This paper shows that two-phase frictional pressure drop in the microchannel can be well predicted by the Lockhart-Martinelli method if we use a new correlation of C value in the Chisholm's equation. Liquid side volumetric mass transfer coefficient and interfacial area as high as about 21 s(-1) and 9000 m(2)/m(3), respectively, can be achieved in the microchannel. Generally, liquid side volumetric mass transfer coefficient increases with the increasing superficial liquid or gas velocity, which can be described satisfactorily by the developed empirical correlations. A comparison of mass transfer performance among different gas-liquid contactors; reveals that the gas-liquid microchannel contactor of this study can provide at least one or two orders of magnitude higher liquid side volumetric mass transfer coefficients and interfacial areas than the others. (c) 2007 Elsevier Ltd. All rights reserved.
关键词[WOS]: ADIABATIC 2-PHASE FLOW ;  INTERFACIAL AREA ;  PRESSURE-DROP ;  MICROSTRUCTURED REACTORS ;  TRANSFER COEFFICIENTS ;  DIRECT FLUORINATION ;  MICRO REACTORS ;  CARBON-DIOXIDE ;  VOID FRACTION ;  ABSORPTION
语种: 英语
WOS记录号: WOS:000245397400020
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140665
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Univ Savoie, LOCIE, F-73376 Le Bourget Du Lac, France
3.Grad Univ, Chinese Acad Sci, Beijing 100039, Peoples R China

Recommended Citation:
Yue, Jun,Chen, Guangwen,Yuan, Quan,et al. Hydrodynamics and mass transfer characteristics in gas-liquid flow through a rectangular microchannel[J]. CHEMICAL ENGINEERING SCIENCE,2007,62(7):2096-2108.
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