Combustion Chars C32 | Petrographic Atlas | SIU

Southern Illinois University



Crelling's Petrographic Atlas of Coals and Carbons

College of Science



Frame ID: C32

Sample ID: Coal Combustion Char

Magnification: As given

Illuminator: Vertical

Objective: 50x oil

Polarizer: In

Analyzer: Out

Retarder Plate: Out

Filter: None

Important Features: Maceral Char Series

High Res image (300 dpi)

Description: : This frame shows the char formed from a fusinite maceral concentrate obtained from the high volatile bituminous Herrin No. 6 coal with density gradint centrifugation. Note the abundance of fusinoid and unfused char. This sample is the same one as that in C31. The 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.