Cs. Mcenally et Ld. Pfefferle, EXPERIMENTAL ASSESSMENT OF NAPHTHALENE FORMATION MECHANISMS IN NON-PREMIXED FLAMES, Combustion science and technology, 128(1-6), 1997, pp. 257-278
Concentration profiles of stable hydrocarbons were measured along the
centerline of several axisymmetric co-flowing methane/air non-premixed
flames whose fuels were doped with 2500 to 1900 ppm of benzene, tolue
ne, ethylbenzene, styrene, and phenylacetylene. The results indicate t
hat the H-abstraction/C2H2-addition mechanism proposed by Frenklach an
d co-workers was responsible for the naphthalene formed in the undoped
, benzene-, styrene-, and phenylacetylene-doped flames. However, a sec
ond source of naphthalene, possibly a reaction between benzyl and prop
argyl radicals, was important in the toluene-and ethylbenzene-doped fl
ames. Soot volume fractions were also measured in each flame; the maxi
mum values correlated well with the maximum naphthalene concentrations
, indicating that naphthalene formation is the critical soot formation
step for these fuel mixtures containing one-ring compounds.