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ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

EXPERIMENTAL STUDY ON PAH AND FULLERENE FORMATION PROCESS IN TOLUENE FLAME AT LOW PRESSURE CONDITION

Get access (open in a dialog) DOI: 10.1615/IHTC13.p26.50
9 pages

Abstract

The process of combustion synthesis is expected to be one of the mass production methods of fullerenes. However, the fullerene formation mechanism from PAHs (Polycyclic Aromatic Hydrocarbons) in a toluene flame has not been clarified yet. In the present study, contents of PAH and fullerene in soot obtained from premixed flames of toluene and oxygen surrounded with premixed flame of methane and oxygen under various flow rates of the center flame and the outer flame were analyzed through gas and liquid chromatography. With the increase of the center flame flow rate of toluene and oxygen, increase of soot yield and decrease of PAH content were observed although there was an optimal flow rate of the center flame for fullerene content. There were differences in PAH content from C10H8 to C24H14 detected depending on the center flame flow rate and the outer flame flow rate. With the increase of the outer flame flow rate of methane and oxygen, there were not so large differences in soot yield and fullerene content when the outer flame flow rate was less than 5.2 m/s. When flow rates of the center flame and the outer flame were relatively high, increase of soot yield and decrease of fullerene content were observed under the present experimental conditions. Contents of higher fullerenes showed different relationships with the outer flame flow rate in comparison with those of such major components as C60 and C70.