Ingredient-Wise Study of Flux Characteristics in the Ceramic Membrane Filtration of Uncontaminated Synthetic Metalworking Fluids, Part 2: Analysis of Underlying Mechanisms

[+] Author and Article Information
Steven J. Skerlos, Richard E. DeVor, Shiv G. Kapoor

Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801

N. Rajagopalan

Illinois Waste Management and Research Center, University of Illinois at Urbana-Champaign, Urbana, IL 61801

V. Don Angspatt

IRMCO Advanced Lubricant Technologies, Evanston, IL 60201

J. Manuf. Sci. Eng 122(4), 746-752 (Nov 01, 1999) (7 pages) doi:10.1115/1.1286131 History: Received March 01, 1999; Revised November 01, 1999
Copyright © 2000 by ASME
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Types of physical obstruction to permeation. (a) Pore constriction due to adsorption. (b) Pore blocking due to physical lodging of particulate. (c) Cake formation due to size-exclusion.
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Electron microscopy images of pore blocking and cake formation. (a) Example of pore blocking caused by 0.22 μm polystyrene beads on a membrane of 0.20 μm pore size. (b) Transition region between cake layer formed by a 0.025 percent dispersion of defoamer in water and portion of membrane not exposed to defoamer.
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Illustration of the concentration polarization phenomenon and characteristic flux vs. pressure response
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Linear and higher-order models for steady-state flux vs. pressure data. Also, comparison of steady-state flux vs. pressure (A1–A6) to transient flux vs. pressure after steady-state flux was achieved at 40 psi (A7).
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FE-ESEM image of an aluminum oxide membrane exposed to synthetic MWF (5 percent) compared to a new membrane
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FE-ESEM image of an aluminum oxide membrane exposed to synthetic MWF (5 percent) compared to similar membrane exposed to lubricant additive (0.25 percent)
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Flux vs. pressure of base fluid mixture in a new membrane (Experiment C7) vs. after significant exposure to specialty additives (Experiment A27)



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