Filter clogging by bimodal aerosol

Tuomas Valmari, Matti Lehtimäki, Aimo Taipale

    Research output: Contribution to journalArticleScientificpeer-review

    10 Citations (Scopus)

    Abstract

    Pressure drop evolution during filtration of bimodal aerosol was studied experimentally. A low-pressure drop pre-filter upstream of the actual collection filter was demonstrated to significantly reduce the pressure drop growth rate, when the aerosol is dominated by coarse particles. The pressure drop evolution during depth-filtration, that took place mainly in a pre-filter, could be predicted by adding up the separately measured contributions from the unimodal fine and coarse aerosols. However, the cake filtration (pre-filter was not used) of coarse particles alone resulted in a faster clogging rate as compared to the same amount of coarse particles accompanied with fine particles (mass ratio coarse:fine 3:1). Apparently, fine particles deposited on coarse particles affect their surface properties and thus the porosity of the cake formed.

    Original languageEnglish
    Pages (from-to)255-260
    Number of pages6
    JournalAerosol Science and Technology
    Volume40
    Issue number4
    DOIs
    Publication statusPublished - 2006
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Aerosols
    Pressure drop
    aerosol
    filter
    pressure drop
    Particles (particulate matter)
    Surface properties
    Porosity
    particle
    low pressure
    porosity

    Keywords

    • aerosols
    • pressure
    • pressure drop
    • pressure effects

    Cite this

    Valmari, Tuomas ; Lehtimäki, Matti ; Taipale, Aimo. / Filter clogging by bimodal aerosol. In: Aerosol Science and Technology. 2006 ; Vol. 40, No. 4. pp. 255-260.
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    Filter clogging by bimodal aerosol. / Valmari, Tuomas; Lehtimäki, Matti; Taipale, Aimo.

    In: Aerosol Science and Technology, Vol. 40, No. 4, 2006, p. 255-260.

    Research output: Contribution to journalArticleScientificpeer-review

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    T1 - Filter clogging by bimodal aerosol

    AU - Valmari, Tuomas

    AU - Lehtimäki, Matti

    AU - Taipale, Aimo

    PY - 2006

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    N2 - Pressure drop evolution during filtration of bimodal aerosol was studied experimentally. A low-pressure drop pre-filter upstream of the actual collection filter was demonstrated to significantly reduce the pressure drop growth rate, when the aerosol is dominated by coarse particles. The pressure drop evolution during depth-filtration, that took place mainly in a pre-filter, could be predicted by adding up the separately measured contributions from the unimodal fine and coarse aerosols. However, the cake filtration (pre-filter was not used) of coarse particles alone resulted in a faster clogging rate as compared to the same amount of coarse particles accompanied with fine particles (mass ratio coarse:fine 3:1). Apparently, fine particles deposited on coarse particles affect their surface properties and thus the porosity of the cake formed.

    AB - Pressure drop evolution during filtration of bimodal aerosol was studied experimentally. A low-pressure drop pre-filter upstream of the actual collection filter was demonstrated to significantly reduce the pressure drop growth rate, when the aerosol is dominated by coarse particles. The pressure drop evolution during depth-filtration, that took place mainly in a pre-filter, could be predicted by adding up the separately measured contributions from the unimodal fine and coarse aerosols. However, the cake filtration (pre-filter was not used) of coarse particles alone resulted in a faster clogging rate as compared to the same amount of coarse particles accompanied with fine particles (mass ratio coarse:fine 3:1). Apparently, fine particles deposited on coarse particles affect their surface properties and thus the porosity of the cake formed.

    KW - aerosols

    KW - pressure

    KW - pressure drop

    KW - pressure effects

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