Cs. Mcenally et Ld. Pfefferle, SOOT FORMATION IN METHANE AIR NONPREMIXED FLAMES DOPED WITH SMALL QUANTITIES OF C3 HYDROCARBONS/, Combustion and flame, 112(4), 1998, pp. 545-558
Citations number
46
Categorie Soggetti
Thermodynamics,"Energy & Fuels","Engineering, Chemical
Gas temperature, C1 to C12 stable hydrocarbon concentrations, and soot
volume fractions were measured in an axisymmetric methane/air coflowi
ng nonpremixed flame whose fuel was doped with one mole per cent allen
e, propene, and propane. The additives did not significantly alter the
temperature field, methane mole fractions, or chain-carrying radical
concentrations. However, soot volume fractions were increased, in the
order allene > propene > propane. The hydrocarbon species measurements
indicated that soot formation increases because the additives undergo
reaction sequences that raise the concentrations of the benzene and p
henyl radical precursors C3H3, C4H3, and C4H5, and consequently enhanc
e the benzene/phenyl formation rate. Therefore, creation of these prec
ursors and of the first aromatic ring are crucial rate-limiting soot f
ormation steps in methane flames. (C) 1998 by The Combustion Institute
.