Synthetic fuel combustion: pollutant formation. Soot initiation mechanisms in burning aromatics. Seventh quarterly report, 1 April-30 June 1982

Technical Report · Fri Jan 01 04:00:00 EST 1982

OSTI ID:6738218

Tanzawa, T; Schertzer, S P; Rawlins, W T

Pyrolysis and combustion of toluene in incident shock waves (1300 to 2500/sup 0/K, 0.3 to 0.8 atm) is being investigated, using optical techniques to monitor the kinetic behavior of incipient soot and several gas phase species. This report describes experiments in which the effects of the radicals OH, O, and H on soot initiation in fuel-rich toluene were studied. In the pyrolysis of toluene near 2000/sup 0/K, the initial reaction is probably rapid formation of the benzyl radical C/sub 7/H/sub 7/, which then forms acetylenic fragments. Dramatic soot formation occurs after about 1 ms. There are kinetic similarities between pyrolytic and oxidative sooting. The sudden onset of sooting in pyrolysis suggest a mechanism involving reactions between major ring fragments and a rapidly growing radical pool. In contrast to toluene, pyridine forms essentially no soot, indicating that the molecular structure of the parent fuel and its ring fragmentation pattern determines the sooting tendency. 19 references, 8 figures, 2 tables. (DLC)

• Research Organization: Physical Sciences, Inc., Andover, MA (USA)
• DOE Contract Number: AC22-80PC30292
• OSTI ID: 6738218
• Report Number(s): DOE/PC/30292-7; TR-341; ON: DE83001513
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ABSORPTION
AROMATICS
ATTENUATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COMBUSTION KINETICS
DATA
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
KINETICS
LASER RADIATION
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
OXYGEN
PYROLYSIS
RADIATIONS
RADICALS
REACTION KINETICS
RESEARCH PROGRAMS
SHOCK TUBES
SOOT
THEORETICAL DATA
THERMOCHEMICAL PROCESSES
TOLUENE
ULTRAVIOLET RADIATION
YIELDS