Composition profiles and reaction mechanisms in a near-sooting premixed benzene/oxygen/argon flame
The structure of a near-sooting flat low-pressure laminar benzene-oxygen-argon flame was studied using a molecular beam mass spectrometer system. Mole fraction profiles of fifty-one species are presented and their mechanistic implications are discussed with regard to the decay of benzene and the formation of polycyclic aromatic hydrocarbons and soot. A mechanism is outlined for production of C/sub 2/, C/sub 3/, C/sub 4/ and C/sub 5/ species from initial attack of O atom on benzene. Trends observed as the fuel equivalence ratio is increased past the sooting limit suggest a sequential growth from polycyclic aromatic hydrocarbons of 120-210 amu to heavier species and then to soot. A critical step in mechanisms for rapid growth of aromatic structures by free radical addition reactions is the stabilization of the adduct by forming six-membered rings. 70 refs.
- Research Organization:
- MIT, Cambridge, MA
- OSTI ID:
- 5453076
- Report Number(s):
- CONF-800809-
- Journal Information:
- Symp. (Int.) Combust., (Proc.); (United States), Conference: 18. combustion symposium, Waterloo, Canada, 17 Aug 1980
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BENZENE
COMBUSTION KINETICS
COMBUSTION PRODUCTS
ARGON
CHEMICAL REACTIONS
MASS SPECTRA
OXYGEN
POLYCYCLIC AROMATIC HYDROCARBONS
SOOT
AROMATICS
CHEMICAL REACTION KINETICS
ELEMENTS
FLUIDS
GASES
HYDROCARBONS
KINETICS
NONMETALS
ORGANIC COMPOUNDS
RARE GASES
REACTION KINETICS
SPECTRA
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry