Recycle effect on membrane extraction through cross-flow rectangular modules

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Title:	Recycle effect on membrane extraction through cross-flow rectangular modules
Authors:	葉和明;Yeh, Ho-ming;Cheng, Hsian-hau;Hsieh, Min-jie
Contributors:	淡江大學化學工程與材料工程學系
Date:	2002-07
Issue Date:	2009-11-04 15:47:05 (UTC+8)
Publisher:	Kidlington: Elsevier
Abstract:	The effects of recycle on membrane extraction through a cross-flow rectangular module have been studied both theoretically and experimentally. Theoretical analysis of mass transfer in cross-flow device with and without recycle is analogous to heat transfer in cross-flow heat exchangers. Experiments were carried out with the use of a membrane sheet made of microporous polypropylene as a permeable barrier to extract acetic acid from aqueous solution by methyl isobutyl ketone. Theoretical predictions are in agreement with the experimental results. In contrast to a device without recycle, improvement in mass transfer is achievable if cross-flow membrane extraction is operated in a device of same size with recycle which provides the increase of fluid velocity, resulting in reduction of mass-transfer resistance. It is shown that recycle can enhance mass transfer, especially for large feed-concentration solution with high distribution coefficient operated under high reflux ratio.
Relation:	Chemical engineering science 57(13), pp.2457-2466
DOI:	10.1016/S0009-2509(02)00136-7
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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