Is another result of a product from delayed coke operation. It is typically a hard pebble-like material and is produced when the Coker unit and sponge coke is operated in such way as to maximize the quality and the quantity of liquid products or non-coke products. When processing high asphaltene and high Sulphur feeds, the refineries goal is to maximize production of liquid products and to minimize the quantity of coke produced.
Under these conditions, shot coke may be formed and the percentage of shot will vary depending of numbers of factors like recycle ratio, operating pressure, temperature and feedstock composition and general Coker operating conditions. As the name indicates, shot coke is spheroid in shape, it is a hard product with low HGI index, and ranges in sizes form a small pebble size to a basketball size.