Kinetic Modeling of Carbon Suboxide Thermal Decomposition and Formation of Soot-Like Particles Behind Shock Waves

Abstract

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 C₃₀ in the gas phase and the formation, growth, transfer, and coagulation of carbon solid particles are modeled with the help of a detailed gas phase kinetic scheme combined with a discrete Galerkin method. Together with the calculation of concentration profiles of small carbon clusters, precursors of solid panicles, soot-like solid particles, and fullerene-like solid particles, the temperature dependencies on the induction 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 for the following experimental conditions: A pressure of 5.0 MPa and a temperature range of 1200 to 2250 K. The comparison of these calculated values with the experimentally measured ones is performed and the possible pathways of transformation of C atoms from C₃O₂ to soot-like solid particles are analyzed.

Keywords:

• carbon suboxide
• carbon cluster
• kinetic modeling
• soot formation

Additional information

Notes on contributors

J. WARNATZ

[email protected]

I.S. ZASLONKO

[email protected]