Analysis of fractal particles from diesel exhaust using a scanning-mobility particle sizer and laser-induced incandescence

Jongil Park, Jaehyuk Yoon, Soonho Song, Kwang Min Chun

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The emission regulations for diesel particulate matter (PM) are becoming increasingly strict. The focus of regulations is turning to reducing the number of nanosized particles as well as the total mass. A more precise measurement technique for particle numbers and mass must be developed to meet these new regulations. In this study, a new method for estimating the mass weighted size distribution of diesel PM was investigated by measuring the size of primary particles and the number concentration distribution of particle aggregates. Time-resolved laser-induced incandescence was used for primary particle size measurement and a scanning-mobility particle sizer was used to quantify the number concentration of aggregates. The results from these two conventional measurement techniques were combined using fractal analysis formulas to relate the electrical mobility diameter, the number of primary particles per aggregate, primary particle size, and fractal dimension. This method, applied to single-cylinder diesel engine exhaust with various engine loads and injection pressures, successfully estimated the mass weighted size distribution of particle aggregates. The procedure is very simple and the estimations are comparable with those based on effective density, making this method a useful and reliable tool for estimating mass weighted size distribution of fractal particles such as diesel PM.

Original languageEnglish
Pages (from-to)531-540
Number of pages10
JournalJournal of Aerosol Science
Volume41
Issue number6
DOIs
Publication statusPublished - 2010 Jan 1

Fingerprint

Vehicle Emissions
Fractals
diesel
Particulate Matter
laser
Scanning
Lasers
Particle size
particulate matter
Exhaust systems (engine)
Fractal dimension
Engine cylinders
Diesel engines
particle size
Engines
fractal analysis
analysis
particle
diesel engine
engine

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Materials Science(all)
  • Pollution

Cite this

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abstract = "The emission regulations for diesel particulate matter (PM) are becoming increasingly strict. The focus of regulations is turning to reducing the number of nanosized particles as well as the total mass. A more precise measurement technique for particle numbers and mass must be developed to meet these new regulations. In this study, a new method for estimating the mass weighted size distribution of diesel PM was investigated by measuring the size of primary particles and the number concentration distribution of particle aggregates. Time-resolved laser-induced incandescence was used for primary particle size measurement and a scanning-mobility particle sizer was used to quantify the number concentration of aggregates. The results from these two conventional measurement techniques were combined using fractal analysis formulas to relate the electrical mobility diameter, the number of primary particles per aggregate, primary particle size, and fractal dimension. This method, applied to single-cylinder diesel engine exhaust with various engine loads and injection pressures, successfully estimated the mass weighted size distribution of particle aggregates. The procedure is very simple and the estimations are comparable with those based on effective density, making this method a useful and reliable tool for estimating mass weighted size distribution of fractal particles such as diesel PM.",
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Analysis of fractal particles from diesel exhaust using a scanning-mobility particle sizer and laser-induced incandescence. / Park, Jongil; Yoon, Jaehyuk; Song, Soonho; Chun, Kwang Min.

In: Journal of Aerosol Science, Vol. 41, No. 6, 01.01.2010, p. 531-540.

Research output: Contribution to journalArticle

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