Pyrolysis of benzene behind reflected shock waves
The pyrolysis of benzene was studied in the temperature and pressure range of 1400-2200K and 0.25-0.81 atm using a shock tube coupled to a time-of-flight mass spectrometer. The mixtures employed were 2.1 and 5% benzene diluted with neon, which yielded a carbon atom density range of (1.6-7.9) x 10/sup 17/ atom cm/sup -3/ in the reflected shock zone. Products were analyzed by recording the mass spectra at 30 ..mu..s intervals during a total observation time of 700-1200 ..mu..s. C/sub 2/H/sub 2/, C/sub 4/H/sub 2/, and C/sub 6/H/sub 2/ were the major products produced during the decomposition. The only species having m/e > 78 were C/sub 8/H/sub 2/ and C/sub 8/H/sub 6/ (phenylacetylene), which were formed in relatively low concentrations and only at the high temperature end of the study. The product analysis was further substantiated by performing experiments with benzene-d6 mixtures under similar conditions. One important finding of this study was the observation that the phenyl radical was not detected above the threshold level of 10/sup -10/ - 10/sup -11/ mol cm/sup -3/ under the reaction conditions investigated. 35 references, 8 figures, 2 tables.
- Research Organization:
- Univ. of New Orleans, LA
- DOE Contract Number:
- AS05-79ER10505
- OSTI ID:
- 5045652
- Journal Information:
- Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 54; ISSN CBFMA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
AROMATICS
BENZENE
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GASES
HYDROCARBONS
INFORMATION
KINETICS
LOW PRESSURE
MASS SPECTROSCOPY
NEON
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PYROLYSIS
RARE GASES
REACTION KINETICS
SHOCK TUBES
SHOCK WAVES
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
VERY HIGH TEMPERATURE