Experimental study and kinetic modeling of benzene oxidation in one-dimensional laminar premixed low-pressure flames

Abstract

One-dimensional laminar premixed benzene-oxygen-argon flames with equivalence ratios of 2, 1, and 0.7, stabilized at low pressure (45 mbar) on a flat flame burner are studied. Gas sampling is performed by a conical quartz nozzle, at different positions in the flames. Identification and monitoring of chemical species is performed by gas chromatography. These measurements should complete experimental data on rich and sooting benzene flames available in the literature and will be of particular help for further improvements of benzene oxidation mechanisms. A comparison of experimental results with data simulated with the use of two recent kinetic models highlights their inability to predict stoichiometric and lean benzene combustion.

A wide range kinetic modeling study of pyrolysis and oxidation of benzene

“…23 are within the experimental uncertainti es. Note that C 3 H 4 is the sum of allene and propyne and model predictio ns also agree fairly well with the relative amount of the two isomers, as measured by [38]. C 4 H 6 is over-pred icted in the flames A and C, while is underpredicted in the flame B. Butadiene is then decompo sed mainly producing C 2 and C 4 species.…”

“…Rich low pressure flames. Very similar benzene flames at low pressures (25-40 mbar) with U = 1.78-2 have been studied by many different groups using different experimental techniques [33,35,37,38].…”

“…These data are particularly useful because they provide more detailed isomer identification. Finally, the structure of similar rich flames (U = 2) at 45-50 mbar was measured using two different techniqu es: gas chromatography [38] and MBMS [35]. The experime ntal conditions of each flame are summarized in Table 4.…”

“…Table 1 summarizes the experimental data relating to benzene. These include well-stirred [16][17][18][19] and flow reactors [14,[20][21][22] at different operating pressures, shock tubes [19,[23][24][25][26][27][28], rapid compression machines [29], batch reactors [30], burner stabilized flames, as well as counterflow and spherically expanding flames [3,[31][32][33][34][35][36][37][38][39]. Figure 1 shows an axonometri c view of the wide range of analyzed experimental temperature , pressure and equivalence ratio condition s, with the related bi-dimensiona l sections.…”

Effect of the n-butanol addition on propargyl radical issued from the combustion of benzene

“…Despite its limited presence in fuels, it is one of the primary intermediates that form during the combustion of higher aromatics and its for mation is deemed as a rate controlling step of PAHs and soot formation in combustion of non aromatic hydro carbons [15]. Besides, according to Detilleux and Van dooren [16], an attractive way to investigate PAH for mation pathways is the analysis of one dimensional laminar premixed low pressure benzene flame struc tures, where the first aromatic ring does not have to be formed. Due to these facts, benzene was chosen, in this work, as a representative for aromatic fuels.…”