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- Title
Analysis of countercurrent membrane vapor extraction of a dilute aqueous biosolute.
- Authors
Liu, David E.; Cerretani, Colin; Tellez, Rodrigo; Scheer, Agnes P.; Sciamanna, Steve; Bryan, Paul F.; Radke, Clayton J.; Prausnitz, John M.
- Abstract
Removal of dilute bioproducts from fermenter broths is a major challenge both to avoid microbe inhibition and to recover solutes economically without water loss. We analyze a proposed new process, membrane vapor extraction (MVE), where semi-volatile dilute aqueous solutes vaporize at the upstream side of an omniphobic, microporous membrane and dissolve into a nonpolar solvent highly favorable to the solutes but not to water. A new membrane-process analysis is outlined and applied to the countercurrent recovery of 2 wt % aqueous butanol by a prototype solvent (dodecane) at 40°C. Thermodynamic phase equilibria, pioneered by the Prausnitz school, are crucial to MVE process design. Over 90% of the feed butanol is recovered with essentially no water loss giving a separation factor of over 1000. Energy requirements in MVE are low. Our design calculations demonstrate that MVE is a viable separation process to remove and recover dilute aqueous biosolutes. © 2015 American Institute of Chemical Engineers AIChE J, 61: 2795-2809, 2015
- Subjects
COUNTERCURRENT processes; BUTANOL; WATER vapor; SEPARATION (Technology); THERMODYNAMICS
- Publication
AIChE Journal, 2015, Vol 61, Issue 9, p2795
- ISSN
0001-1541
- Publication type
Article
- DOI
10.1002/aic.14892