Permeation of Liquids through Inorganic Nanofiltration Membranes

Inorganic nanofiltration membranes were prepared using silica–zirconia 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°C. For membrane...

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Bibliographic Details
Published in:Journal of colloid and interface science 2000-08, Vol.228 (2), p.292-296
Main Authors: Tsuru, Toshinori, Sudou, Takashi, Kawahara, Shun-ichi, Yoshioka, Tomohisa, Asaeda, Masashi
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
inorganic membrane
Membrane separation (reverse osmosis, dialysis...)
Membranes
nanofiltration
organic solvents
permeation
porous membrane
viscosity
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Summary:Inorganic nanofiltration membranes were prepared using silica–zirconia 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°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.
ISSN:0021-9797
1095-7103
DOI:10.1006/jcis.2000.6955