Some characteristics of pervaporation for dilute ethanol-water mixtures by alcohol-permselective composite membrane

Journal Article · Sun Dec 01 00:00:00 EST 1996 · Separation Science and Technology

OSTI ID:494261

Li, Xiaohe; Wang, Shichang ^[1]

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1. Tianjin Univ. (China)

Zeolite-filled polydimethylsiloxane/polysulfone composite membranes were prepared and used to separate ethanol from dilute ethanol-water mixtures through a pervaporation process. During this process the relationship between flux (J) and temperature (T) is J = 597.95 exp(-E{sub o}/RT)(g/m{sup 2}{center_dot}h), E{sub o} = 3.292 kJ/mol. The experimental results show that the flux decreases with increasing downstream pressure while the selectivity ({alpha}{sub EtOH/Water}) rises, the flux increases, and the selectivity decreases with a rise of feed concentration, and the flux as well as the selectivity increase with increasing bulk velocity on the upstream side of the membrane.

• OSTI ID: 494261
• Journal Information: Separation Science and Technology, Vol. 31, Issue 20; Other Information: PBD: Dec 1996
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
10 SYNTHETIC FUELS
ETHANOL
SEPARATION PROCESSES
WATER
ZEOLITES
MEMBRANES
SILOXANES
SULFONES