Fuels can be any material that can store potential energy in form that can be practically used as heat energy. Various sources and their examples are :-
>> Solid fuel : wood fuel, charcoal, peat, coal, Hexamine fuel tablets
>> Liquid fuel : diesel, gasoline, kerosene, LPG, coal tar, naphtha, ethanol
>> Gaseous fuels : hydrogen, propane, coal gas, water gas, blast furnace gas, coke oven gas, CNG
>> Biofuels : Bioethanol and Biodiesel
>> Fossil fuels : coal, petroleum, and natural gas
Source :- http://en.wikipedia.org/wiki/Fuel
eAnswers Team
Fuels can be any material that can store potential energy in form that can be practically used as heat energy. Various sources and their examples are :-
>> Solid fuel : wood fuel, charcoal, peat, coal, Hexamine fuel tablets
>> Liquid fuel : diesel, gasoline, kerosene, LPG, coal tar, naphtha, ethanol
>> Gaseous fuels : hydrogen, propane, coal gas, water gas, blast furnace gas, coke oven gas, CNG
>> Biofuels : Bioethanol and Biodiesel
>> Fossil fuels : coal, petroleum, and natural gas
Source :- http://en.wikipedia.org/wiki/Fuel