As a domain expert with a focus on energy resources, I'm well-versed in the distinctions between different types of carbon-based materials. Let's delve into the differences between coal and coke.

Coal is a naturally occurring sedimentary rock primarily composed of carbon, along with various other elements including hydrogen, sulfur, oxygen, and nitrogen. It is formed from the remains of ancient vegetation that has been subjected to intense heat and pressure over millions of years. There are several types of coal, classified by their carbon content and energy value, ranging from lignite, sub-bituminous, bituminous, to anthracite. Each type has different applications, with anthracite being the highest quality and used in applications that require high heat and low emissions.

Coke, on the other hand, is a product of coal that has been processed through a high-temperature treatment known as carbonization or coking. This process removes impurities and volatile substances from the coal, leaving behind a substance that is almost pure carbon. The result is a hard, grey, and porous material that is highly resistant to reaction with oxygen and other elements. Coke is produced specifically from bituminous coal, which has a high carbon content and low impurities, making it ideal for the coking process.

The primary use of coke is in the production of iron and steel, where it serves as a reducing agent in blast furnaces. The high carbon content of coke allows it to react with iron ore to produce molten iron and carbon dioxide. This reaction is essential for the smeread more >>

Coal is a natural occurring substance whereas Coke prepared material with few impurities and high Carbon content, usually made from Coal. 2. Coal has a Volatile matter content whereas Coke has relatively very low Volatile matter content which suits it for a better fuel.read more >>