Title
A high aspect ratio membrane reactor for liquid-liquid extractionA high aspect ratio membrane reactor for liquid-liquid extraction
Author
Faculty/Department
Faculty of Applied Engineering Sciences
Research group
Faculty of Applied Engineering - other
Advanced Reactor Technology (ART)
Publication type
article
Publication
Amsterdam,
Subject
Chemistry
Engineering sciences. Technology
Source (journal)
Journal of membrane science. - Amsterdam
Volume/pages
436(2013), p. 154-162
ISSN
0376-7388
ISI
000317388300015
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
In the present study, a high aspect ratio membrane reactor was evaluated in terms of extraction efficiency in co- and countercurrent flow using 2 different membrane types (Teflon® and polycarbonate). Using the parallel plate Poiseuille expression to approximate the flow profile in flat rectangular channels with high aspect ratios an analytical solution was established to describe the concentration profiles in the microcontactor for non-miscible mixtures, which was numerically and experimentally validated. Fast and uniform mass transfer could be enabled by providing ordered spacers of 100 and 200 μm in the reactor substrate. With the flow rates in this optimization being limited by the Laplace pressure of the membrane, a pressure driven alternative mimicked by adapting the flow rates inversely to the liquid viscosity ratios is analyzed and experimentally validated for co-current mode. Using the device in co-current mode, the system has the potential to serve as a fast screening tool to determine partition coefficients requiring 5-15 min per combination only. It was furthermore analyzed how the channel depth should be adapted when aiming to maximize the extracted mass. Similarly, also the optimal depth to achieve a preset concentration specification was analyzed.
E-info
https://repository.uantwerpen.be/docman/iruaauth/274b18/4284803.pdf
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