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PVA 막에 에탄올-물 혼합물의 투과증발분리

Pervaporation of Ethanol-Water Mixtures through PVA Membranes

김범식 이수복 이철호

Kim BS Lee SB Lee CH

HWAHAK KONGHAK, October 1988, 26(5), 467-472(6)
https://doi.org/NONE

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Abstract

PVA（poly vinyl alcohol） 막에 의한 pervaporation으로 에탄올-물 혼합물 분리의 가능성을 검토하였다. PVA 막은 물을 에탄올보다 선택적으로 투과시켜 0.7몰분율 이상의 고농도 에탄올 수용액에 대해 2-20 정도의 분리 계수를 보였으나, 저농도 에탄올 수용액에 대해서는 분리 효과가 거의 없었다. Permeate flux는 고농도 에탄올 수용액에 대하여 0-2.0 liter/hr·㎡ 정도이었다. 조업 온도 상승 및 permeate측의 감압으로 PVA막의 분리 성능을 어느 정도 향상시킬 수 있었다.

The possibility of separation of ethanol-water mixtures was investigated by pervaporation through PVA（poly vinyl alcohol） membranes. PVA membranes allowed preferential pervaporation of water over ethanol, and showed the selectivity of about 2-20 for the mixtures with high ethanol content above 0.7 mole fraction. But, they are nearly effective for dehydration of the mixtures with low ethanol content. The permeate flux were about 0-2.0 liter/hr·㎡ for high-content ethanol mixtures. Both selectivity and permeate flux could be increased by increasing the operating temperature and decreasing the pressure in permeate side.

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