Difference Between Petroleum Coke and Coal

There are many variations between petroleum coke and coal, commonly the following:

1 Physical properties

• Petroleum coke: irregular black block or granular, with steel luster, porous structure, excessive genuine density after calcination, low thermal growth coefficient, and low resistivity.

• Coal: usually black or brownish black, with block or powder appearance, hardness and glossiness differ relying on the type. Compared with petroleum coke, its actual density is especially small and its thermal enlargement coefficient is large.

2 Chemical properties

• Petroleum coke: excessive carbon content, normally above 80%, and incorporates 1.5%-8% hydrogen, as properly as small quantities of oxygen, nitrogen, sulfur and steel elements. The sulfur content material is high, relying on the sulfur content material of the uncooked cloth residue.

• Coal: additionally generally composed of carbon, however with excessive unstable depend and ash content, and low constant carbon content. The sulfur content material is commonly low, however some coals have a excessive sulfur content.

3 Production process

• Petroleum coke: frequently produced via delayed coking unit, heavy oil undergoes deep thermal cracking and polymerization at excessive temperature to produce petroleum coke and different by-products.

• Coal: mined from coal mines. After mining, coal commonly undergoes ore dressing, coal washing and different techniques to cast off impurities. Coal coking is to warmth coal or coal combination to about 1000℃ beneath oxygen-free stipulations to distill it into strong coal coke.

4 Application

• Petroleum coke: in the main used to manufacture electrodes, fuels, rubber additives, carbon fibers, etc. High-quality petroleum coke such as needle coke is an essential uncooked cloth for manufacturing graphite electrodes.

• Coal: broadly speaking used for electricity generation, and is additionally extensively used in steel production, cement manufacturing, synthesis fuel and calcium carbide production. Coking coal is an essential uncooked cloth for steelmaking, and thermal coal is broadly speaking used for electricity generation.