P22
Frame ID: P22
Sample ID: Petroleum (Delayed) Coke
Magnification: As given
Illuminator: Vertical
Objective: 50x oil
Polarizer: In
Analyzer: In
Retarder Plate: In
Filter: None
Important Features: Shot coke
Description: Coke derived from a petroleum feedstock that shows a shot structure. Note the circular area (shot) at the top of the frame. In hand specimen this type of coke consists of small spherical pellets.