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A mechanism for the formation of soot particles and soot deposits

✍ Scribed by J.M. Smedley; A. Williams; K.D. Bartle

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 709 KB
Volume: 91
Category: Article
ISSN: 0010-2180
DOI: 10.1016/0010-2180(92)90128-c

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✦ Synopsis

The extent of the role of polycyclic aromatic hydrocarbon (PAH) species in the mechanism of soot formation has not definitely been determined. In previous work using a fiat-flame, water-cooled, premixed burner burning ethylene-air flames we investigated the formation and destruction of PAH species up to five aromatic ring structures. This was achieved using a CDS pyroprobe coupled to a Perkin Elmer gas chromatograph. In the present work a mass spectrometer is employed to identify the larger PAH species up to 11 aromatic rings. Soot samples collected from both cooled and uncooled plates and free stream flame gases have been analyzed. Experimental results support the theory that PAHs are directly involved in soot particle inception while C2H2 is indirectly involved until the PAHs are depleted.

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