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- W2916040823 abstract "A shock tube coupled to a time-of-flight mass spectrometer has been employed to sample mixtures of various fuels (methane, acetylene, propane, cyclohexane, benzene, and toluene) with or without oxygen in order to determine the major kinetic pathways to soot formation. One significant observation has been the product distribution from toluene pyrolysis which consists primarily of compounds and radical intermediates having masses less than that of the parent fuel and containing relatively low amounts of species having masses greater than toluene. The experiment was performed at temperatures and fuel densities where previous laser extinction work reported soot conversion yields of 80 to 90%. Supporting work for our findings is found from Knudsen cell experiments over the temperature range of interest in which the product distribution was recorded mass spectrometrically and from single pulse shock tube experiments which included the analysis of gas after shock heating. These results are important since they question the absolute amounts of soot yield reported by several research groups using the laser extinction technique. However, the relative yields of soot conversion determined by the laser technique from a wide variety of fuels may be correct. Even more important is our result that acetylene is the major productmore » of toluene pyrolysis which argues against the commonly held view that ring condensation steps dominate fragmentation reaction channels.« less" @default.
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- W2916040823 date "1980-04-01" @default.
- W2916040823 modified "2023-09-27" @default.
- W2916040823 title "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, 1979-August 31, 1980" @default.
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