Benzene formation in premixed fuel-rich 1,3-butadiene flames
Journal Article
·
· Proceedings of the Combustion Institute
- Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551
Detailed kinetic modeling and flame-sampling molecular-beam time-of-flight mass spectrometry are combined to unravel important pathways leading to the formation of benzene in a premixed laminar low-pressure 1,3-butadiene flame. The chemical kinetic model developed is compared with new experimental results obtained for a rich (phi = 1.8) 1,3-butudiene/O(2)/Ar flame at 30 Torr and with flame data for a similar but richer (phi = 2.4) flame reported by Cole et al. [Combust. Flame 56 (1) (1984) 51-70]. The newer experiment utilizes photoionization by tunable vacuum-ultraviolet synchrotron radiation, which allows for the identification and separation of combustion species by their characteristic ionization energies. Predictions of mole fractions as a function of distance from the burner of major combustion intermediates and products are in overall satisfactory agreement with experimentally observed profiles. The accurate predictions of the propargyl radical and benzene mole fractions permit an assessment of potential benzene formation pathways. The results indicate that C(6)H(6) is formed mainly by the C(3)H(3) + C(3)H(3) and i-C(4)H(5) + C(2)H(2) reactions, which are roughly of equal importance. Smaller contributions arise from C(3)H(3) + C(3)H(5). However, given the experimental and modeling uncertainties, other pathways cannot be ruled out.
- Research Organization:
- Cornell Univ., Ithaca, NY (United States)
- Sponsoring Organization:
- USDOE IG Office of Audit Services (IG-30)
- DOE Contract Number:
- FG02-01ER15180
- OSTI ID:
- 1060548
- Report Number(s):
- DOE-ER15180-15
- Journal Information:
- Proceedings of the Combustion Institute, Journal Name: Proceedings of the Combustion Institute Journal Issue: 1 Vol. 32; ISSN 1540-7489
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
1
3-Butadiene
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ACETYLENE
AROMATIC-HYDROCARBON FORMATION
Benzene formation
COMBUSTION CHEMISTRY
DIFFUSION FLAMES
FORMATION MECHANISMS
Laminar flames
MASS-SPECTROMETRY
Mass spectrometry
Modeling
OXIDATION
PRECURSORS
RADICALS
TEMPERATURES
3-Butadiene
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ACETYLENE
AROMATIC-HYDROCARBON FORMATION
Benzene formation
COMBUSTION CHEMISTRY
DIFFUSION FLAMES
FORMATION MECHANISMS
Laminar flames
MASS-SPECTROMETRY
Mass spectrometry
Modeling
OXIDATION
PRECURSORS
RADICALS
TEMPERATURES