Modeling of the Relationship Between Pore Size Distribution and Thickness of Ceramic MF Membrane |
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Authors: | Dong Junhang Wang Pei Xu Nanping Shi Jun Jerry YSLin |
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Affiliation: | Membrane Science & Technology Research Center, Nanjing University of Chemical Technology, Nanjing 210009, China Department of Chemical Engineering, University of Cincinnati, Cincinnati, Ohio OH 45221, USA |
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Abstract: | The pore size distribution (PSD) measured by the gas bubble point (GBP) inethod of ceramic microfiltration (MF) membranes prepared by suspension technique was found to be significantly influenced by the membrane thickness. A culm-like model for pore structure was introduced to characterize the membrane pores instead of the conventional model which does not reflect the radius variation along the pore passages and is unable to explain the thickness effect on the membrane PSD. A laminate structure, taking the culm-like model for pore structure into consideration, was hypothesized for ceramic MF membranes. A mathematical model was then established to quantitatively describe the relationship between the membrane number PSD and the membrane thickness. Good results were obtained for the correlation of mean pore size and simulation of the PSD for ceramic MF membranes. |
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Keywords: | modeling pore structure pore size distribution thickness ceramic membrane |
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