Calculation of mass-weighted distribution of diesel particulate matters using primary particle density

Jaehyuk Yoon, Mijin Kim, Soonho Song, Kwang Min Chun

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Recently, the diesel engine particulate matter (PM) emission standard was changed from being based on mass to being based on both number and mass. However, it is difficult to determine the mass- and number-weighted distributions simultaneously because of the complex shapes of PM.We studied a new method to determine the mass-weighted distribution of PM using the primary particle density, and compared it with two conventional PM measurement methods using effective density and gravimetric filtration. In the method developed, the primary particle size was measured using transmission electron microscopy (TEM)-calibrated laser-induced incandescence (LII) to detect changes in the primary particle size in real-time. The number-weighted distribution of aggregates was measured with a scanning mobility particle sizer (SMPS). The mass-mobility exponent and the effective density were determined with an impactor and the SMPS. The differences in the mass concentrations for each technique were between 3.1% and 29.9%.

Original languageEnglish
Pages (from-to)419-427
Number of pages9
JournalJournal of Aerosol Science
Volume42
Issue number6
DOIs
Publication statusPublished - 2011 Jan 1

Fingerprint

Particulate Matter
diesel
particulate matter
Particle size
Scanning
Diesel engines
Transmission electron microscopy
Lasers
particle size
measurement method
diesel engine
distribution
calculation
particle
transmission electron microscopy
laser

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Materials Science(all)
  • Pollution

Cite this

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abstract = "Recently, the diesel engine particulate matter (PM) emission standard was changed from being based on mass to being based on both number and mass. However, it is difficult to determine the mass- and number-weighted distributions simultaneously because of the complex shapes of PM.We studied a new method to determine the mass-weighted distribution of PM using the primary particle density, and compared it with two conventional PM measurement methods using effective density and gravimetric filtration. In the method developed, the primary particle size was measured using transmission electron microscopy (TEM)-calibrated laser-induced incandescence (LII) to detect changes in the primary particle size in real-time. The number-weighted distribution of aggregates was measured with a scanning mobility particle sizer (SMPS). The mass-mobility exponent and the effective density were determined with an impactor and the SMPS. The differences in the mass concentrations for each technique were between 3.1{\%} and 29.9{\%}.",
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Calculation of mass-weighted distribution of diesel particulate matters using primary particle density. / Yoon, Jaehyuk; Kim, Mijin; Song, Soonho; Chun, Kwang Min.

In: Journal of Aerosol Science, Vol. 42, No. 6, 01.01.2011, p. 419-427.

Research output: Contribution to journalArticle

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