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Pervaporation of n-Butanol/water Mixture through Organophilic ZSM-5 Zeolite Membrane  

Cho, Moon-Hee (Dept. of Chem. Eng., College of Eng., Chungnam National University)
Kong, Chang-In (Dept. of Chem. Eng., College of Eng., Chungnam National University)
Lee, Yong-Taek (Dept. of Chem. Eng., College of Eng., Chungnam National University)
Publication Information
Membrane Journal / v.21, no.4, 2011 , pp. 336-344 More about this Journal
Abstract
Organophilic ZSM-5 membrane was synthesized on the inside of a porous stainless steel support by a hydrothermal secondary growth with seed crystals. They are used to separate n-butanol from its aqueous solution. Pervaporation characteristics such as a permeation flux and a separation factor are investigated as a function of the feed concentration and the operating temperature. The concentration of n-butanol was changed from 0.001 mole fraction to 0.015 mole fraction with an interval of 0.005 mole fraction; the operating temperature was controlled to be 25C, $35^{\circ}C$ and $45^{\circ}C$. When the operating temperature was $45^{\circ}C$, the flux of n-butanol significantly increased from 2 to $27g/m^2/hr$ as the mole fraction of n-butanol in the feed side increased from 0.001 to 0.015. Consequently, the concentration of n-butanol in the permeate substantially increased from 0.0016 to 0.052 mole fraction. When the feed concentration was 0.015, the flux of n-butanol significantly increased from 13 to $27g/m^2/hr$ as the operating temperature increased from $25^{\circ}C$ to $45^{\circ}C$. As a result, the concentration of n-butanol in the permeate also increased from 0.045 to 0.052 mole fraction.
Keywords
n-Butanol; Pervaporation; ZSM-5; Zeolite membrane;
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