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Permeation of Liquids through Inorganic Nanofiltration Membranes

✍ Scribed by Toshinori Tsuru; Takashi Sudou; Shun-ichi Kawahara; Tomohisa Yoshioka; Masashi Asaeda

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
65 KB
Volume
228
Category
Article
ISSN
0021-9797

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✦ Synopsis

Inorganic nanofiltration membranes were prepared using silicazirconia composite sols by the sol-gel method and applied for the permeation experiments of nonaqueous solutions. Pure solvent permeabilities of methanol, ethanol, and 1-propanol were measured at temperatures from 25 to 60 β€’ C. For membranes having pore sizes as large as 70 nm, the permeation mechanism of alcohols obeys the viscous flow mechanism irrespective of types of alcohols. On the other hand, the permeation mechanism through porous silica-zirconia membranes having pore diameters of 1 to 5 nm was found to be different from the viscous flow mechanism; small molecules showed larger permeabilities than large molecules. Activation energies of solvent permeability were found to be larger for large molecules and for membranes of smaller pore size.

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