Analysis of Ash Adhesion Behavior at High Temperature Condition by Using Computer controlled FE-SEM with Heat Treatment Unit

The purpose of this paper is to analyze the increasing mechanism of cohesive and adhesive force of ash powders from a coal combustion system at high-temperature conditions, a new observation system, which was composed of computer controlled FE-SEM and chamber unit for the heat treatment, was developed. By using this system, the liquid phase formation on the surface of pressurized fluidized bed coal combustion ash samples was observed after heat treatment at 1123 K, which temperature was corresponding to the rapid increasing temperature of adhesion behavior of ash powder samples.