Pervaporation and dialysis of water-ethanol solutions using silicone rubber membranes

Journal Article · Sat Jan 01 00:00:00 EST 1983 · Sep. Sci. Technol.; (United States)

DOI:https://doi.org/10.1080/01496398308060315· OSTI ID:6907278

do Carmo Goncalves, M; Galembeck, F

Ethanol-water solutions may be concentrated by pervaporation through silicone rubber and regenerated cellulose film. Using silicone, separation factors (SF) decrease as the ethanol concentration in the feed solution increases (SF = 6.5 using 12.9 w/w% ethanol and 1.4 using 83.2% ethanol at 30/sup 0/C). The temperature effect on separation factors is negligible, but is appreciable on permeation rates. Ethanol permeation rates in the dialysis mode are not linear with ethanol chemical potentials in solution; silicone swelling coefficients also increase noticeably with alcohol concentration in aqueous solutions, indicating that preferential ethanol sorption occurs and is responsible for the separation.

• Research Organization: Instituto de Quimica-Unicamp, Campinas, Brazil
• OSTI ID: 6907278
• Journal Information: Sep. Sci. Technol.; (United States), Vol. 18:10
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
ETHANOL
DIALYSIS
REFRACTIVITY
WATER
AQUEOUS SOLUTIONS
CELLULOSE
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
FILMS
MEDIUM TEMPERATURE
PERMEABILITY
RUBBERS
SILICONES
TEMPERATURE DEPENDENCE
ALCOHOLS
CARBOHYDRATES
DATA
DISPERSIONS
ELASTOMERS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
MIXTURES
NUMERICAL DATA
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SILICON COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYMERS
POLYSACCHARIDES
SACCHARIDES
SEPARATION PROCESSES
SILOXANES
SOLUTIONS
090222* - Alcohol Fuels- Preparation from Wastes or Biomass- (1976-1989)