Enhancement of gas-liquid mass transfer in microchannels by rectangular baffles
Enhancement of gas-liquid mass transfer in microchannels by rectangular baffles
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矩形挡板增强微通道内气液传质
DOI：
10.1016/j.seppur.2019.116306
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发表时间：
2020-04
影响因子：
8.6
通讯作者：
Youguang Ma
中科院分区：
文献类型：
--
作者：
Yaran Yin;Rongwei Guo;Chunying Zhu;Taotao Fu;Youguang Ma
为了提高气液传质效率，构建了交错矩形折流板微通道结构。以CO2/水为研究对象，考察了折流板堵塞长度、折流板间距、通道宽度以及气液表观速度对体积传质系数、压降和有效能效的影响。根据气液两相流在折流板微通道内的流动形态，分析了其强化传质的机理。比较了有挡板和无挡板微通道的体积传质系数，说明挡板结构对传质的强化作用。增大挡板堵塞长度和通道宽度、减小挡板间距均有利于强化气液传质，最大强化因子可达2.8。虽然折流板结构会导致压降的绝对值增加0.5kPa或相对值增加23%，但这对于实际应用来说是可以接受的。在最大强化传质的情况下，有效能量效率可达2.25。该研究可为矩形折流板微过程强化装置的开发和优化提供理论指导。
The configuration of microchannel with staggered rectangular baffles was constructed to improve the gas-liquid mass transfer efficiency. The influences of the baffle blockage length, baffle interval, channel width and the gas and liquid superficial velocities on the volumetric mass transfer coefficient, pressure drop and efficient energy efficiency for CO2/water system were investigated experimentally. The enhancement mechanism of mass transfer was analyzed according to the gas-liquid two-phase flow pattern in baffled microchannels. The comparison of the volumetric mass transfer coefficient between the microchannels with and without baffles was performed to present the intensification of baffled structure to mass transfer. The increases of baffle blockage length and channel width, and the reduction of baffle interval are conducive to enhancing gas-liquid mass transfer, with the maximum enhancement factor up to 2.8. Although the baffled structure could lead to an increase in pressure drop within 0.5 kPa in absolute value or 23% in relative value, which is an acceptable rise for practical application. Moreover, effective energy efficiency could reach to 2.25 in the case of the maximum enhancement of mass transfer. This study could provide theoretical guidance for the development and optimization of rectangular baffled microdevices for process intensification.
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影响因子：
4.7
作者：
P. Plouffe;Michael Bittel;Jonas Sieber;D. Roberge;A. Macchi
通讯作者：
P. Plouffe;Michael Bittel;Jonas Sieber;D. Roberge;A. Macchi
影响因子：
4.7
作者：
Yao, Chaoqun;Dong, Zhengya;Chen, Guangwen
通讯作者：
Chen, Guangwen
DOI：
10.1021/je00051a011
发表时间：
1988-01-01
期刊：
JOURNAL OF CHEMICAL AND ENGINEERING DATA
影响因子：
--
作者：
VERSTEEG, GF;VANSWAAIJ, WPM
通讯作者：
VANSWAAIJ, WPM
DOI：
10.1515/ijcre-2016-0231
发表时间：
2018-03-01
影响因子：
1.6
作者：
Karthikeyan, K.;Sujatha, L.;Sudharsan, N. M.
通讯作者：
Sudharsan, N. M.
影响因子：
2.1
作者：
Henke, L;Winterbauer, H
通讯作者：
Winterbauer, H