Frame ID: C03
Sample ID: Coal Combustion Char
Magnification: As given
Objective: 50x oil
Retarder Plate: Out
Important Features: Crassisphere
Description: : The object in the center of the field is a typical crassisphere. It is characterized by its spheroidal shape, open center, and thick walls. This char was produced in an entrained flow reactor in nitrogen with a heating rate of 104-105 degrees C per second with a residence time of approximately one second at a maximum temperature of 1000 degrees C.