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Received July 30, 2016
Accepted October 11, 2016
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Minimizing axial dispersion in narrow packed column using superhydrophobic wall
Department of Chemical Engineering,, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India 1Department of Chemical Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India
soubhikge@gmail.com, bhaumik.sh.che@ismdhanbad.ac.in
Korean Journal of Chemical Engineering, December 2016, 33(12), 3337-3342(6), 10.1007/s11814-016-0286-0
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Abstract
The scope of minimizing dispersion in narrow packed column using superhydrophobic (SH) wall is assessed experimentally with implications in analytical techniques such as liquid chromatography. The study includes devising a packed column (7-19 mm) with lotus leaf pasted on the inner wall and establishing a gravity driven flow through it. The flow dispersion is characterized based on the residence time distribution study of the column. The results are compared against similar flow through smooth packed column. Experimental results reveal the influence of two factors: column diameter as well as the wall features, superhydrophobic or smooth. For similar surface features, the axial dispersion reduces with decrease in column diameter due to the increase in voidage, which leads to plug flow. For the same diameter, between smooth and superhydrophobic, effects of slip in the latter reduce the dispersion significantly. Thus, the introduction of superhydrophobic narrow columns can play a crucial role in minimizing dispersion in analytical techniques.
Keywords
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