The effect of process parameters on the pervaporation of alcohols through organophilic membranes

Journal Article · Mon Jun 01 00:00:00 EDT 1992 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399208019729· OSTI ID:5216769

Hickey, P J; Juricic, F P; Slater, C S ^[1]

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1. Manhattan College, Riverdale, NY (United States)

Several organophilic membranes were utilized to selectively permeate ethanol, n-butanol, and t-butanol from dilute aqueous mixtures using pervaporization (PV). Poly(1-(trimethylsilyl)-1-propyne) (PTMSP) membranes were utilized to investigate the effect of temperature, pressure, and start-up/transient time on the separation of aqueous ethanol mixtures. Results indicate optimal ethanol selectivity and flux at the lowest permeate-side pressure. Increased temperature significantly enhanced the productivity of PTMSP, but extended operation of the PTMSP membranes at high temperatures resulted in flux degradation. Two other hydrophobic membranes, poly(dimethyl siloxane) (PDMS) and a poly(methoxy siloxane) (PMS) composite, were used to separate n-butanol and t-butanol from dilute aqueous mixtures. The effect of feed concentration of the flux and selectivity was investigated. Both membranes were found to be more permeable to n-butanol than t-butanol. The PDMS membrane was found to be more effective than PMS membrane in terms of flux and selectivity. The effect of membrane thickness on water permeation and on organic selectivity was also studied using the PDMS membrane.

• OSTI ID: 5216769
• Journal Information: Separation Science and Technology; (United States), Vol. 27:7; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
BUTANOLS
MEMBRANE TRANSPORT
ETHANOL
MEMBRANES
PERFORMANCE TESTING
AQUEOUS SOLUTIONS
CHEMICAL COMPOSITION
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
MEASURING METHODS
MIXTURES
PRESSURE DEPENDENCE
QUANTITY RATIO
TEMPERATURE DEPENDENCE
THICKNESS
TIME DEPENDENCE
WATER
ALCOHOLS
DATA
DIMENSIONS
DISPERSIONS
EVALUATION
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SOLUTIONS
TESTING
090900* - Biomass Fuels- Processing- (1990-)