STP975

    Characteristics of Membrane Filters for Particle Collection

    Published: Jan 1986


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    Abstract

    A summary is given of the aerosol filtration models for membrane filter media. While the capillary tube model has been shown to accurately predict the particle collection characteristics of Nuclepore membrane filters, the fibrous filter model gives more accurate prediction for the conventional solvent-cast membranes. Excellent agreement has been found between the effective fiber diameter used in the model and the diameter of the fiber-like structures in the conventional membrane. Results are presented showing the comparisons of the measured filter penetration with the theoretically predicted value for various particle sizes and filtration velocities. Excellent agreement has been obtained both in the degree of particle penetration through the filter and the location of the most penetrating particle size. For the conventional membranes the most penetrating particle size is typically in the range of 0.05 to 0.2 um diameter.

    Keywords:

    Gas filtration, membrane filters, aerosol filtration, filtration theories, filter modeling


    Author Information:

    Rubow, Kenneth L.
    Research Associate and Manager, and Professor and Director, University of Minnesota, Minneapolis, MN

    Liu, Benjamin Y. H.
    Research Associate and Manager, and Professor and Director, University of Minnesota, Minneapolis, MN


    Paper ID: STP42082S

    Committee/Subcommittee: F21.20

    DOI: 10.1520/STP42082S


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