KAGAKU KOGAKU RONBUNSHU
Online ISSN : 1349-9203
Print ISSN : 0386-216X
ISSN-L : 0386-216X
Influence of Feed Temperature on Ultrafiltration Performance
Tsuyoshi NomuraShin-ich NakaoShoji Kimura
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1987 Volume 13 Issue 6 Pages 811-817

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Abstract

To study the influence of feed temperature on the concentration polarization phenomenon in ultrafiltration and on the membrane transport coefficient such as pure water permeability Lp, membrane reflection coefficient σ, and solute permeability P. ultrafiltration experiments were carried out at various temperatures with both a heat-resistant polysulfone membrane and a ceramic membrane.
The experimental results showed that at fairly high temperature mass transfer coefficient k, which is used for correction of the concentration polarization, can be obtained by using the velocity variation method or a mass transfer correlation such as Deissler's equation.
Volume flux increased with rise in temperature and thus the amount of solute carried to the membrane surface by the flux also increased. It was found, however, that the solute concentration at the membrane surface does not increase because the mass transfer coefficient also increases with rise in temperature and the amount of solute diffusing back to the bulk of feed increases.
In transfer parameters, Lp increased with rise in temperature and this increase could be explained by change of viscosity of permeate solution. σ was constant independent of temperature. P changed according to change of solute diffusivity coefficient with temperature.

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© by THE SOCIETY OF CHEMICAL ENGINEERS, JAPAN
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