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Identification and temporal behavior of radical intermediates formed during the combustion and pyrolysis of gaseous fuels: kinetic pathways to soot formation. Progress report, September 1, 1982-June 30, 1983

Technical Report ·
OSTI ID:6770488
; ; ; ; ;
The objective is to investigate the reaction kinetics of soot formation. The pyrolysis of toluene, benzene, butadiene and allene have been studied. The pyrolysis rate was measured by sampling gas from the reflected shock zone with a time-of-flight mass spectrometer. The identification of intermediates and final products formed during the reaction time was used to formulate the sequence of steps leading to soot formation. Little or no evidence was found for the ring condensation route to soot formation. The primary products formed from the pyrolyses of these compounds are C/sub 2/H/sub 2/, C/sub 4/H/sub 2/, and C/sub 6/H/sub 2/. A common feature is the presence of acetylene as a major product and its subsequent thermal stability at low temperatures and its role in the formation of polyacetylene at higher temperatures. An attempt is being made to model the concentration profiles obtained for C/sub 2/H/sub 2/, C/sub 4/H/sub 2/, C/sub 6/H/sub 2/, and C/sub 8/H/sub 2/ and to construct a reliable set of thermochemical and kinetic parameters that may be inserted into modeling for the pyrolyses of toluene, benzene, allene, and butadiene. (ATT)
Research Organization:
New Orleans Univ., LA (USA). Dept. of Chemistry
DOE Contract Number:
AS05-79ER10505
OSTI ID:
6770488
Report Number(s):
DOE/ER/10505-T1; ON: DE83007087
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALLENE
AROMATICS
BENZENE
BUTADIENE
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DECOMPOSITION
DIENES
HYDROCARBONS
KINETICS
MASS SPECTROSCOPY
ORGANIC COMPOUNDS
POLYENES
PYROLYSIS
RADICALS
REACTION INTERMEDIATES
REACTION KINETICS
RESEARCH PROGRAMS
SOOT
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
TOLUENE
YIELDS