The Carbon Phases Formed During Pyrolysis Of Gaseous Hydrocarbons In Reaction Volume Of A Fluidized Bed Apparatus

摘要

In view of the kinetic laws of hydrocarbon pyrolysis, three mechanisms of the carbon phase formation are considered: the mechanism of individual atoms, the two-stage model of growth, and the mechanism of agglomerate. The macrostructure is investigated by means of optical and scanning electron microscopy, and the microstructure of carbon deposits is investigated with the help of transmission electron microscopy. The parameters of crystal structure are determined as well: the parameter of lattice (a), the interlayer distance (d_(002)), and the coherent dispersion areas L_a and L_c. The radiation stability of pyrocarbon is investigated under irradiation with a stream of high-energy electrons. The fact of a noncatalytic growth of the carbon fibers on the outfit walls of a fluidized bed apparatus (above the level of the particles) forming owing to interfacing globular deposits in the pores is established.