Kinetic modeling of carbon suboxide thermal decomposition and formation ofsoot-like particles behind shock waves

The kinetic modeling of thermal decomposition of C3O2 and formation of soot -like solid particles behind shock waves is carried out. The transformation of C atoms up to the cluster C-30 in the gas phase and the formation, grow th, transfer, and coagulation of carbon solid particles are modeled with th e help of a detailed gas phase kinetic scheme combined with a discrete Gale rkin method. Together with the calculation of concentration profiles of sma ll carbon clusters. precursors of solid panicles, soot-like solid particles , and fullerene-like solid particles, the temperature dependencies on the i nduction period, the growth rate constant, the yield, and the mean size of carbon solid particles are obtained for a mixture of 0.33 % C3O2 in argon f or the following experimental conditions: A pressure of 5.0 MPa and a tempe rature range of 1200 to 2250 K. The comparison of these calculated values w ith the experimentally measured ones is performed and the possible pathways of transformation of C atoms from C3O2 to soot-like solid particles are an alyzed.