Mechanistic Model of Coaxial Microfiltration for Semi-Synthetic Metalworking Fluid Microemulsions

[+] Author and Article Information
Fu Zhao, Marcy Urbance, Steven J. Skerlos

Department of Mechanical Engineering, The University of Michigan at Ann Arbor, Ann Arbor, MI, 48109-2125

J. Manuf. Sci. Eng 126(3), 435-444 (Sep 07, 2004) (10 pages) doi:10.1115/1.1763187 History: Received September 01, 2002; Online September 07, 2004
Copyright © 2004 by ASME
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Coaxial microfiltration (A) versus cross-flow microfiltration (B)
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Microfiltration Testbed Components: 1) nitrogen cylinder; 2) MWF holding cell; 3) stir plate; 4) stir bar; 5) relief valve; 6) membrane holder; 7) mass balance; 8) computerized data acquisition
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CLSM (A) and ESEM (B, C) images of 5.0 μm membranes. Edges of (A) show cross section of the membrane along Z-direction
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Predicted water flux at 213 kPa based on Eq. (1) versus experimentally observed water flux values
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Representative flux vs. time data for the semi-synthetic MWF during coaxial microfiltration (213 kPa). Inset provides flux average of two replications at 90 minutes versus pore size.
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Conceptual illustration of 3-stage fouling process for semi-synthetic MWF flux decline during coaxial microfiltration
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ESEM images and pore statistics of 0.8 μm membranes after permeating the semi-synthetic MWF for different time periods. Pore diameter distribution closely follows normal distribution at all time periods.
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(A) Percentage of open pores as a function of time, and (B) the surface film thickness as a function of time during coaxial microfiltration of the semi-synthetic MWF through 0.8 μm membranes at 213 kPa pressure.
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Comparison of experimental results, proposed model (Eq. 18), and previous reported model 22 (0.8 μm membrane, 213 kPa)
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Specific resistance calculated after internal restriction has established and before the flux decline due to external blocking dominates the flux decline due to internal restriction



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