Abstract

An investigation has been undertaken using a reflected shock tube to examine the formation of soot from toluene, benzene and straight-chain heptane. The properties of the soot formed depend on temperature, pressure and the concentration of the hydrocarbon being oxidized or pyrolysed. The reflected shock temperature of the gas was determined by measurements of the reflected pressure and the velocity of the incident shock wave. Samples of soot formed during the reaction were taken from the shock tube and examined using a transmission electron microscope to characterize the particles. Stereopairs were taken to determine their three-dimensional structure. The relative concentrations and type of soot produced were correlated with the reflected temperatures and information derived on the formation of the soot.

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