Question

1000 words points on fuels and its classification

Answer 1

· Fuel can be defined as a combustible substance which contains carbon as its main components, which gives large amount of heat on proper burning. 
· Carbon can be used economically for domestic and industrial requirements. 
· Common example involving wood, charcoal, coal, kerosene, petrol, diesel, producer gas, oil gas, etc. 
· During combustion process of a fuel like coal, the atoms of carbon, hydrogen, etc. combine with oxygen with the simultaneous release of heat at a speedy rate. 
· This energy is released due to the "rearrangement of valence elections" in these atoms, resulting in the formation of new compounds like methane and water.

FUEL + OXYGEN ---> PRODUCTS + HEAT.

· Coals and petroleum oils are the main source of the fuel; the available quantity of these sources is reduced day by day. 
· Fossil fuels are composed by natural resources such as anaerobic decomposition of buried dead organisms. 
· The age of the organisms and their resulting fossil fuels is more than millions of years. 
· They are non-renewable resources because they take thousands of years to form, and reserves are being decomposed much faster than new ones are being made. 
· Its uses and production raise environmental

classification

1. Solid fuel 
· Solid fuel is defined as raw materials which are used as a primary fuel to produce energy and provide heating. 
· Common example under this category includes wood, charcoal, peat, coal, Hexamine fuel tablets, and pellets made from wood, wheat, rye and other grains. 
· It also used in solid fuel rocket technology. 
· For creating fire, it has been used. 
· Coal is used for firing furnaces, to running steam engines. 
· Steam locomotives engines are operated by using wood as fuel. 
· In electricity generation, peat and coals are used. 
· Due to unsafe levels of toxic emissions, use of some solid fuels is restricted or prohibited in some urban areas.

2. Liquid Fuel 
· Liquid fuels are defined as combustible or energy-generating molecules which are used to produce mechanical energy. 
· Fumes of these fuels are flammable instead of the fluid. 
· Most liquid fuels which are used for various purpose in now days, are derived from petroleum