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7735814 
Journal Article 
Liquid-liquid and liquid-gas extraction of aroma compounds with hollow fibers 
Viladomat, FG; Souchon, I; Pierre, FX; Marin, M 
2006 
Yes 
AIChE Journal
ISSN: 0001-1541
EISSN: 1547-5905 
WILEY 
HOBOKEN 
52 
6 
2079-2088 
English 
WOS:000237869200013 
The extraction of 15 aroma compounds from a highly diluted aqueous feed with hollow fiber membrane contactors was investigated. Membrane-Based Solvent Extraction (MBSE) and Membrane Air-Stripping (MAS) were tested with the aqueous feed cross-flowing on the shell side and the stripping phase flowing in the lumen of the hollow fiber. Experimental results showed that globally, MBSE offered higher overall mass transfer coefficients than MAS. This difference was mainly explained by the gap in partition coefficients. Hexane-water partition coefficients were about 10,000 times higher than air-water partition coefficients. The contribution of each local resistance to mass transfer was identified by a resistance-in-series model. Mass transfer in the aqueous feed boundary layer is the limiting step in MBSE, while mass transfer in the stripping gas boundary layer is the limiting step in MAS. A diagnostic tool based on partition coefficients was developed in order to help choose the adequate process for the extraction of an aroma compound. © 2006 American Institute of Chemical Engineers. 
membrane-based solvent extraction; membrane air-stripping; membrane contactor; mass transfer; physicochemical properties