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, 1985

Technical Report · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5993484

Kern, R D; Singh, H J; Pamidimukkala, K M; Wu, C H; Esslinger, M A; Winkeler, P W

Many of the questions that we raised in our previous proposal about the mechanism by which several key fuels react in the pre-particle soot formation process have been answered. Many new questions have been posed and these will be considered in the proposal portion of our report. The first question that we addressed was the amount of soot formed as reported in the literature from the pyrolyses of toluene, benzene, butadiene, and acetylene. The first two fuels were reported to have maximum soot yields of 80 to 90% from a similar amount of initial carbon atom concentration; namely, 2 x 10/sup 17/ atoms/cm/sup 3/. Additionally, it was believed that the major reaction pathway for aromatics was that of ring condensation which led directly to soot via PCAH formation as opposed to ring fragmentation producing acetylene as the major product which was followed by a polyacetylenic route to soot formation. This proposition was based upon the experimental observation that an equivalent amount of acetylene gave rise to much lower soot yields (approx. 10%) than either toluene or benzene. The experimental technique employed was the laser extinction method coupled to a shock tube. 19 references.

• Research Organization: New Orleans Univ., LA (USA). Dept. of Chemistry
• DOE Contract Number: AS05-79ER10505
• OSTI ID: 5993484
• Report Number(s): DOE/ER/10505-4; ON: DE85006173
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ACETYLENE
ALKYLATED AROMATICS
ALKYNES
AROMATICS
BENZENE
BUTADIENE
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DECOMPOSITION
DIENES
HYDROCARBONS
KINETICS
LASERS
MASS SPECTROSCOPY
ORGANIC COMPOUNDS
POLYENES
PYROLYSIS
REACTION INTERMEDIATES
REACTION KINETICS
SHOCK TUBES
SOOT
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
TOLUENE
YIELDS