SILPAKORN UNIVERSITY SCIENCE AND TECHNOLOGY JOURNAL, Vol 10, No 2 (2016)

Review on “Membranes for Ethanol-Water Separation”

Panupong Chuntanalerg, Santi Kulprathipanja, Thanyalak Chaisuwan, Sujitra Wongkasemjit










Abstract


Thailand. Typically, the ethanol concentration after fermentation is quite low. Normally, ethanol, as called anhydrous
ethanol or absolute ethanol used for fuel energy, is required 99.5% purity or concentration. It is necessary to use
energy-effective separation method for concentrating ethanol up to the fuel level. There are several techniques used
to purify ethanol such as distillation, membrane technology and molecular sieve separation. Recently, the less energyintensive
technique of pervaporation is found to be a promising method for producing high-purity ethanol, but the
overall economic feasibility is dependent upon the membrane. Thus, in this review, various membranes reported in
literature are discussed and compared as to their advantages, disadvantages, and separation performance via the
pervaporation process. It is found that different membranes provide different performances and advantages in ethanol
separation. Other parameters governing the separation performance, such as temperature, ethanol concentration,
membrane production method, and production cost, are also included.
Key Words: Pervaporation; Membrane; Ethanol; Purification; Separation performance

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