49.石炭ガス化過程における灰の生成挙動解析

抄録

Inorganic constituents in coal are transformed into ash particles that may build up the deposit on wall and interfere with the stable operation of coal gasification process. The size and chemical composition of generated ash particles have a great influence on the particle trajectory and adhesion properties. In order to analyze the ash formation behavior during coal gasification, several char samples were collected from the drop-tube type gasification equipment with changing a residence time and CO_2 concentration. Computer Controlled Scanning Electron Microscopy (CCSEM) was employed for tracking the change of chemical composition and size distribution of inorganic constituents on a particle-by-particle basis in the course of devolatilization and gasification reaction.