Coal Particle Modeling in a Slagging Combustor

To achieve a reasonable agreement between simulation and the physical processes in the combustor, there is a need to model the evolution of individual coal particles. Starting with the characteristics of the parent coal particles, the model that is to be developed will trace the whole history of the particles (size, mass, porosity etc.) until the particle is burnt and its residuals exit the combustor. These processes can be categorized into three main processes -- devolatilization, char structure evolution and char consumption. The focus of the current work is to develop a char structure evolution model that predicts particle size and porosity after devolatilization, as well as to model char capture by slag and its devolatilization and consumption.