Modeling Sieving Filtration using Multiple Layers of Parallel Pores

Experimental retention data with several membrane filters show that the filtration efficiency decreases considerably over time, which appears to be inconsistent with a size exclusion retention mechanism. Several model descriptions of the porous structure are considered to describe this behavior. Sim...

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Bibliographic Details
Published in:Chemical engineering & technology 2010-08, Vol.33 (8), p.1377-1381
Main Author: Beuscher, U.
Format: Article
Language:English
Subjects:
Membrane processes
Microfiltration
Modeling
Simulation
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Summary:Experimental retention data with several membrane filters show that the filtration efficiency decreases considerably over time, which appears to be inconsistent with a size exclusion retention mechanism. Several model descriptions of the porous structure are considered to describe this behavior. Simulation results with a sieving mechanism are compared to experimental data and the influence of input parameters are investigated. Fairly simple models may be used to qualitatively describe the retention behavior. More complex models are necessary to allow for a more accurate description of the physical geometry of the structure and a better quantitative representation of the experimental data. Transient experimental data for filtration efficiency shows a decrease in performance over time. This behavior is compared to a simple multi‐layer modeling approach using a size exclusion particle retention mechanism. Several model variations are explored and the experimental data is represented well after optimizing input parameter and pore selection rules.
ISSN:0930-7516
1521-4125
DOI:10.1002/ceat.201000123