CATEGORY: MICROPROCESS ENGINEERING
Chemical Engineering Research and Design,
Available online 9 August 2013, In Press, Corrected Proof
Review on gas–liquid separations in microchannel
devices
Koon F. Lam, Eva Sorensen, Asterios Gavriilidis,
Department of Chemical Engineering, University College London, Torrington
Place, London WC1E 7JE, United Kingdom
Abstract
Separations in the area of chemical microprocess
engineering have attracted limited attention compared to reactive processes.
Microstructured devices offer the opportunity of intensifying transport
processes associated with separation operations by providing high ratios of
contact areas to volume, short transport distances and high driving force
gradients. These properties have been exploited for various microseparations.
Authors review separations where gas and liquid
phases are present, and in particular on absorption, stripping and
distillation. Two main approaches for contacting the two phases have been used,
to wit, continuous and dispersed phase contactors. Removal of components from
gas mixtures by absorption and stripping of volatiles from liquid mixtures have
been achieved in falling film devices, thin porous plate microcontactors, as
well as in dispersed flow systems. Distillation has been performed in
microchannel devices, utilizing capillary, centrifugal and gravity forces,
vacuum or carrier gas.
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