Coke is a well known industrial fuel. It is made by heating and compressing Bituminous Coal. The More Fuels Mod added Coke in version 1.4.0 as part of The Useful Update. It can be made by smelting Bituminous Coal in a furnace. It has a burn time of 3200 Ticks or 160 Seconds. This is double the burn time of vanilla Coal.
You can get Coke by smelting Bituminous Coal in a furnace. This will give you 0.5 experience points per Coke.