Determination of Limiting Flux and Threshold Pressure in Stirred Ultrafiltration of Colloidal Suspensions

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Title:Determination of Limiting Flux and Threshold Pressure in Stirred Ultrafiltration of Colloidal Suspensions
Creators:
Vladisavljevic, Goran T.
Pavasovic, Vladeta Lj.
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 62, 9, pp. 1413-1422
Uncontrolled Keywords:Membrane resistance, Threshold pressure, Limiting flux, Ultrafiltration, Silica sol

Abstract

The stationary permeate flux during ultrafiltration of colloidal suspensions reaches a limiting value, <i>J</i><sub>l</sub>, at high pressure differences. According to the gel polarization model employed here, the existence of this limiting flux is a consequence of gelation of the solution at the membrane-solution interface. The limiting permeate flux, <i>J</i><sub>l</sub>, can easily be determined from experimental data by plotting ∆<i>p/J</i><sub>s</sub> against ∆<i>p</i>. Furthermore, the membrane resistance at zero pressure difference, R<sub>m</sub><sup>0</sup>, and the pressure difference necessary to reach 95 per cent of the limiting flux, <i>i.e. </i>the threshold pressure, ∆<i>p</i><sub>t</sub>, may be calculated, too. The agreement between the model and experimental data is satisfactory. The laboratory-made silica sol consisting of uniform spherical particles with a surface average diameter of 18 nm was selected as a working fluid throughout this study.

Title:Determination of Limiting Flux and Threshold Pressure in Stirred Ultrafiltration of Colloidal Suspensions
Creators:
Vladisavljevic, Goran T.
Pavasovic, Vladeta Lj.
Uncontrolled Keywords:Membrane resistance, Threshold pressure, Limiting flux, Ultrafiltration, Silica sol
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:62
Number:9
Page Range:pp. 1413-1422
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19971413UNSPECIFIED
ID Code:1217
Item Type:Article
Deposited On:06 Feb 2009 17:07
Last Modified:06 Feb 2009 16:07

Citation

Vladisavljevic, Goran T.; Pavasovic, Vladeta Lj. (1997) Determination of Limiting Flux and Threshold Pressure in Stirred Ultrafiltration of Colloidal Suspensions. Collection of Czechoslovak Chemical Communications, 62 (9). pp. 1413-1422. ISSN 0010-0765

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