Limiting flux in membrane separations: A model based on the viscosity dependency of the mass transfer coefficient
✍ Scribed by Pierre Aimar; Robert Field
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 857 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0009-2509
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✦ Synopsis
A hydrodynamic theory is presented to describe the phenomenon of limiting flux in membrane processes. An analysis based upon a development of film theory shows that the variation of viscosity with concentration will, by its very nature, lead to a limiting flux. A previously used relationship between viscosity and concentration is then used to develop a practical version of the limiting condition. The flux-concentration relationship obtained from this relationship is in excellent agreement with the literature. The new model mimics the log-normal relationship over the range for which it is applicable without the need to assume a hypothesized condition such as a gel layer. At present, the model does not include the effect of fouling.