C04
Frame ID: C04
Sample ID: Coal Combustion Char
Magnification: As given
Illuminator: Vertical
Objective: 50x oil
Polarizer: In
Analyzer: In
Retarder Plate: In
Filter: None
Important Features: Anisotropic Crassisphere
Description: : The object in the center of the field is a typical anisotropic crassisphere. It is characterized by its spheroidal shape, open center, thick walls and optical anisotropy. 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.