Pervaporation and dialysis of water-ethanol solutions using silicone rubber membranes
Journal Article
·
· Sep. Sci. Technol.; (United States)
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), Journal Name: Sep. Sci. Technol.; (United States) Vol. 18:10; ISSN SSTED
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
09 BIOMASS FUELS
090222* -- Alcohol Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
ALCOHOLS
AQUEOUS SOLUTIONS
CARBOHYDRATES
CELLULOSE
COMPARATIVE EVALUATIONS
DATA
DIALYSIS
DISPERSIONS
ELASTOMERS
ETHANOL
EXPERIMENTAL DATA
FILMS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
MEDIUM TEMPERATURE
MIXTURES
NUMERICAL DATA
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SILICON COMPOUNDS
OXYGEN COMPOUNDS
PERMEABILITY
PHYSICAL PROPERTIES
POLYMERS
POLYSACCHARIDES
REFRACTIVITY
RUBBERS
SACCHARIDES
SEPARATION PROCESSES
SILICONES
SILOXANES
SOLUTIONS
TEMPERATURE DEPENDENCE
WATER
090222* -- Alcohol Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
ALCOHOLS
AQUEOUS SOLUTIONS
CARBOHYDRATES
CELLULOSE
COMPARATIVE EVALUATIONS
DATA
DIALYSIS
DISPERSIONS
ELASTOMERS
ETHANOL
EXPERIMENTAL DATA
FILMS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
MEDIUM TEMPERATURE
MIXTURES
NUMERICAL DATA
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SILICON COMPOUNDS
OXYGEN COMPOUNDS
PERMEABILITY
PHYSICAL PROPERTIES
POLYMERS
POLYSACCHARIDES
REFRACTIVITY
RUBBERS
SACCHARIDES
SEPARATION PROCESSES
SILICONES
SILOXANES
SOLUTIONS
TEMPERATURE DEPENDENCE
WATER