Changes

Coke (fuel)

Coke (fuel)

'''Coke''' is made by heating [[coal]] in a retort in the absence of air.  The volatile components of the coal are driven off as a gas (coal gas) which, after purification, can be used as a fuel. The solid remaining in the retort is coke.

'''Coke''' is made by heating [[coal]] in the absence of air.  The volatile components of the coal are driven off as a gas and the remaining solid is coke.  The [[steel industry]] is a major consumer of coke. Coke was formerly made in "beehive ovens" and the gas was wasted.  Modern coking plants recover the gas which, after purification, can be used as a fuel.  

 

In the 21st century, coal gas has largely been replaced by [[natural gas]] but coke is still made for use as a [[reducing agent]] in the [[steel industry]].

Petroleum coke is a similar material made from oil.

Petroleum coke is a similar material made from oil.