Concentration profiles for radical species in a methane--oxygen--argon flame. [Slightly lean flame]
Journal Article
·
· Combust. Flame; (United States)
Concentration profiles through the reaction zone of a low-pressure, slightly lean methane-oxygen-argon flame have been measured, in situ, for the following unstable species: Oxygen atoms, hydrogen atoms, hydroxyl radicals, methyl radicals, and formyl radicals. The conditions of measurement, means of identification, and method for estimating the concentrations of the radicals are described. The observed maximum mole fractions are 2.3 x 10/sup -2/ for H, 1.1 x 10/sup -2/ for OH, and 0.8 x 10/sup -2/ for O, the maxima occurring in the recombination zone for these species. The maximum values are in excess of equilibrium concentration by factors of approximately 10 - 10/sup 3/. Methyl and formyl radicals have maximum mole fractions in the reaction zone of 2.2 x 10/sup -3/ and 6 x 10/sup -5/, respectively. Equilibrium constants, calculated from the appropriate measured species concentrations for the fastest reactions of the H/sub 2/ = CO = O/sub 2/ flame, which is the last stage of this hydrocarbon flame, suggest that these reactions are essentially balanced in this part of the flame.
- OSTI ID:
- 7266131
- Journal Information:
- Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 21; ISSN CBFMA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Radical species profiles for a methane--oxygen--argon flame. [O/sub 1/H/sub 1/OH/sub 1/CH/sub 3/, CHO]
Radical overshoot in the reaction zone of methane-air diffusion flames
Chemical flame inhibition using molecular beam mass spectrometry. An examination of the partial equilibration hypothesis and radical recombination in 1/20 atm methane flames. Report of investigations
Technical Report
·
Sun Dec 31 23:00:00 EST 1972
·
OSTI ID:5376377
Radical overshoot in the reaction zone of methane-air diffusion flames
Conference
·
Sat Oct 01 00:00:00 EDT 1977
·
OSTI ID:5203014
Chemical flame inhibition using molecular beam mass spectrometry. An examination of the partial equilibration hypothesis and radical recombination in 1/20 atm methane flames. Report of investigations
Technical Report
·
Fri Dec 31 23:00:00 EST 1976
·
OSTI ID:7299368