Abstract
Rates of particle formation in the thermal decomposition of acetylene in a diffusion flame have been measured. Particle formation rate-time curves are characterized by a sharp maximum. The particle formation rate at the maximum point is of the order of 1015 particles/cm3/sec. The formation of soot particles is regarded as a result of a branched-chain process and of the destruction of active particles on the surface of the soot particles being formed. An analytical consideration demonstrates that the generation process of active particles (radical nuclei) has an activation energy of the order of 170 kcal/mole. An assumption is expressed that the radical C2 is the radical nucleus in the case.
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