Model and calculation of the gasification of a single carbon particle

A mathematical model for the gasification of a single carbon particle in carbon dioxide was developed. The porous structure of the particle, diffusion processes, the gasification processes on the pore surface according to the Langmuir–Hinshelwood model, and reactions on active carbon sites are taken into account. The particle temperature is specified. The calculation results show that the gasification of the particle and the release of carbon oxides continue after termination of the supply of the gasifying agent. This is due to the fact that C(O)$_L$ complexes–oxygen atoms bonded to carbon atoms – are detached from the pore surface with a time delay; the CO release during gasification decreases considerably in the initial period of time because of a decrease in the amount of unoccupied active carbon sites. Data were obtained on the distribution of the degree of carbon conversion and other parameters on the particle radius with time.