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    Influence of flow-interruption on filter performance during the filtration of liquid aerosols by fibrous filters

    186182_186182.pdf (469.9Kb)
    Access Status
    Open access
    Authors
    Bredin, Arne
    Mullins, Benjamin
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Bredin, Arne and Mullins, Benjamin. 2012. Influence of flow-interruption on filter performance during the filtration of liquid aerosols by fibrous filters. Separation and Purification Technology. 90: pp. 53-63.
    Source Title
    Separation and Purification Technology
    DOI
    10.1016/j.seppur.2012.02.009
    ISSN
    13835866
    Remarks

    NOTICE: this is the author’s version of a work that was accepted for publication in Separation and Purification Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Separation and Purification Technology, Volume 90, April 2012, Pages 53-63, http://dx.doi.org/10.1016/j.seppur.2012.02.009,

    URI
    http://hdl.handle.net/20.500.11937/18731
    Collection
    • Curtin Research Publications
    Abstract

    This study investigated the influence of flow interruptions on the filtration performance of two different multi-layered fibrous filters during liquid aerosol filtration. It was found that both types of filters experienced a significant secondary loading stage, though they had reached a steady state for continuous flow. The filters showed distinctive increases in pressure drop and filter saturation until a second equilibrium state was reached. This second equilibrium state was attributed to a rearrangement of liquid in the filter during the breaks, clogging previously free passages. The ratio of shear and capillary forces was found to determine whether these passages were able to be “cleaned” once airflow was recommenced. Based on these findings, the airflow required to clean fully saturated filters was investigated and a phenomenological model developed to describe this behaviour. Furthermore, it was found that filters could be cleaned and reused, whereby they would return to one of the previous steady states (continuous or discontinuous flow). The experiments conducted in this work represent a more realistic test for oil-mist (or coalescing) filters than typical laboratory testing. Furthermore, it is hoped that they will help to bridge the gap between laboratory and field test results.

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