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Characterization of Filter Sampled PM
Published May 19, 2010 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
Particulate matter (PM) has harmful effects on human health. Then, characteristics of PM and its compositions inside and outside of flame were required to develop reduction technologies for combustion origin PM. In this paper, relationship between PM size distribution and compositions such as soot and soluble organic fraction (SOF) of filter sampled PM were investigated. A laser-induced incandescence (LII) method was used to obtain spatial distribution of soot in a benzene flame. PM at the LII region in flame and exhaust PM from flame tip were directly sampled on a glass fiber filter. Then, compositions of PM sampled from inside and outside of benzene diffusion flame were characterized using a combustion type PM analyzer (MEXA-1370PM). Further, size distributions of PM were measured using an ELPI (Electrical Low Pressure Impactor). It was confirmed that main composition of PM in the flame (In-flame PM) was nuclei or aggregation mode particle (particle diameter is 150 nm) with SOF of low boiling point, but PM emitted from the flame tip (Out-flame PM) was aggregation mode particle (about 400 nm) with SOF of high boiling point.