Liquid-liquid two-phase mass transfer in the T-junction microchannels
Liquid-liquid two-phase mass transfer in the T-junction microchannels
复制标题
T形连接微通道中的液-液两相传质
DOI：
10.1002/aic.11333
复制
发表时间：
2007-12-01
期刊：
影响因子：
3.7
通讯作者：
Yuan, Quan
中科院分区：
文献类型：
--
作者：
Zhao, Yuchao;Chen, Guangwen;Yuan, Quan
本文通过实验研究了逆流和错流两种不锈钢T型接头微通道中不混溶流体的传质特性。选择水-琥珀酸-正丁醇作为液-液两相传质过程的典型例子。在我们的实验中，不混溶的液-液两相的混合速度分别在0.4 mm微通道的0.01至2.5 m/s和0.6 mm微通道的0.005至2.0 m/s的范围内变化。两相混合物的雷诺数在19~650之间变化。在单个微通道内定量测定了总体积传质系数，其值在0.067~17.35 s(-1)范围内，比传统液-液接触器高了两三个数量级。此外，还研究了入口结构、流体入口位置、混合通道的高度和长度、体积通量比的影响。开发了基于实验数据预测体积传质系数的经验相关性。 (c) 2007 年美国化学工程师学会 AIChE J，53：3042-3053，2007 年。
In this work, the mass transfer characteristics of immiscible fluids in the two kinds of stainless steel T-junction microchannels, the opposing-flow and the cross-flow T-junction, are investigated experimentally. Water-succinic acid-n-butanol is chosen as a typical example of liquid-liquid two-phase mass transfer process. In our experiments, the mixture velocities of the immiscible liquid-liquid two phases are varied in the range from 0.01 to 2.5 m/s for the 0.4 mm microchannel and from 0.005 to 2.0 m/s for the 0.6 mm microchannel, respectively. The Reynolds numbers of the two-phase mixture vary between 19 and 650. The overall volumetric mass transfer coefficients are determined quantitatively in a single microchannel, and their values are in the ranges of 0.067-17.35 s(-1), which are two or three orders of magnitude higher than those of conventional liquid-liquid contactors. In addition, the effects of the inlet configurations, the fluids inlet locations, the height and the length of the mixing channel, the volumetric flux ratio have been investigated. Empirical correlations to predict the volumetric mass transfer coefficients based on the experimental data are developed. (c) 2007 American Institute of Chemical Engineers AIChE J, 53:3042-3053, 2007.