A silicon microseparator based pervaporation process for separation of ethanol/water mixtures using a polymer membrane

被引:4
作者
Ramprasad, Sudhir [1 ]
Palmer, James D. [1 ]
机构
[1] Louisiana Tech Univ, Dept Chem Engn, Ruston, LA 71270 USA
关键词
microchemical system; microfluidics; polymer membranes; pervaporation;
D O I
10.1080/01496390701477170
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The selective removal of water from ethanol through pervaporation was demonstrated in a microchannel device using a commercial membrane. Photolithography and dry etching techniques were employed for fabrication of the microseparator with hydraulic diameters of 30 mu m to 80 mu m. Experiments conducted at 90 degrees C and 2-3 Torr, with Reynolds Numbers ranging from 8 to 91, resulted in an average water and ethanol permeance of 1.2 x 10(-3) and 8 X 10(-5) cm(3)/cm(2) center dot S center dot cmHg respectively. A mass transfer analysis involving Sherwood correlations was used to calculate the theoretical boundary layer resistance. The comparison of overall mass transfer coefficient with the boundary layer coefficients suggests that the membrane was the dominant resistance for this system.
引用
收藏
页码:2483 / 2499
页数:17
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