Mass-Transfer Enhancement in Double-Pass Mass Exchangers with External Refluxes

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Title:	Mass-Transfer Enhancement in Double-Pass Mass Exchangers with External Refluxes
Authors:	Ho, Chii-dong;Yeh, Ho-ming;Chiang, Su-ching
Contributors:	淡江大學化學工程與材料工程學系
Date:	2001-11-06
Issue Date:	2009-11-04 15:52:01 (UTC+8)
Publisher:	Washington: American Chemical Society (ACS)
Abstract:	The enhancement of mass transfer in double-pass countercurrent-flow parallel-plate mass exchangers with uniform wall concentration and external refluxes at the ends has been developed by either inserting an impermeable sheet or preferably inserting a permeable barrier. The analytical treatment was carried out by the orthogonal expansion technique with the assumptions of fully developed laminar flow and constant fluid properties. Considerable improvement in mass transfer is obtainable by employing double-pass devices with a permeable barrier instead of using double-pass devices with an impermeable sheet and single-pass devices. Analytical results also show that the reflux ratio and permeable-barrier (or impermeable-sheet) position are two important manipulated parameters resulting in substantial improvement of the mass-transfer efficiency compared with that in single-pass operations.
Relation:	Industrial & engineering chemistry research 40(24), pp.5839-5846
DOI:	10.1021/ie0009334
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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