Filter clogging by bimodal aerosol

Tuomas Valmari, Matti Lehtimäki, Aimo Taipale

Research output: Contribution to journalArticleScientificpeer-review

9 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

TY - JOUR

T1 - Filter clogging by bimodal aerosol

AU - Valmari, Tuomas

AU - Lehtimäki, Matti

AU - Taipale, Aimo

PY - 2006

Y1 - 2006

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

U2 - 10.1080/02786820500543282

DO - 10.1080/02786820500543282

M3 - Article

VL - 40

SP - 255

EP - 260

JO - Aerosol Science and Technology

JF - Aerosol Science and Technology

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ER -