free about coal & petroleum

The main constituents of coal are- carbon, hydrogen, oxygen and small amounts of sulphur and nitrogen. Coal is obtained by mining and occurs deep inside the Earth. It is now believed that the changes in the Earth's crust might have buried the prehistoric forests under the crust..

Coal is formed in nature by the 'carbonisation' of wood. Conversion of wood to coal under the influence of high temperature, high pressure, and in the absence of air is termed carbonisation. Amongst coal varieties, anthracite is the purest form. It contains about ..

Coal varies in quality according to the amount of pressure and heat to which it is subjected to during its formation. Coal consists largely of carbon, hydrogen and oxygen and a small amount of sulphur. It comes in 3 form..

Coal varies in quality according to the amount of pressure and heat to which it is subjected to during its formation. Coal consists largely of carbon, hydrogen and oxygen and a small amount of sulphur. It comes in 3 forms. A Swampy Forest Lignite..

The process of heating coal in the absence of oxygen to obtain useful products is called destructive distillation of coal..

On destructive distillation, coal yields useful products like coal gas, coal tar, ammonia and coke. Generation of electricity Domestic fuel for cooking and heating Manufacture of synthetic petroleum and natural gas To heat water in steam engines and boile..

Depending upon the extent of carbonization, coal can be classified into four types as follows: Classification of coal Type of Coal Carbon content Commonly known as Peat 11% - Lignite 38% Soft coal / brown coal Bituminous 65% ..

Coal and Petroleum - Fossil fuels, like, coal, lignite, petroleum and natural gas are non renewable natural resources. Both have an organic origin and are called hydrocarbon fuels. Coal was formed in nature as a solid from the remains of the trees buried deep inside th..

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Coal and Petroleum..