Sunday, August 23, 2009

Fossil fuels

As we know that coal, oil and natural gas are the components of fossil fuels. We will see about the formation of them and the process involved in them in this . The formation of fossil fuels involves three process. They are
  1. Combustion,
  2. Drilling and
  3. Refining





Formation:-
  • Going back to the earlier days of Earth, the plants and animals that lived then eventually died and decomposed. The majority of these life forms were phytoplankton and zooplankton. When these ancient ocean dwellers died, they accumulated on the bottom of a seabed; this is how a good portion of our fossil fuel reserves began.
  • The actual transformation process of these prehistoric creatures is not known, but scientists do know that the pressure, heat, and a great deal of time go into the making of fossil fuels. These fields always contain some gas, but this natural gas, methane, does not take nearly as long to form.
  • Natural gas is also found in independent deposits within the ground as well as from others sources too. Methane is a common gas found in swamps and is also the byproduct of animals' digestive system. Incidentally, Methane is also a greenhouse gas.

Combustion:-
Combustion is the process of breaking atomic bonds to release energy in the form of light and heat. Fossil fuels have many hydrocarbons, each with numerous bonds. When they undergo combustion, they release a great deal of heat. This is the main reason why natural gas and heating oils are used extensively in the world today. However, energy in the form of heat is by nature very chaotic and disorganized.

Drilling:-
The term used to describe the process of penetrating the earth’s crust and involving the removal of material during the creation of a well. The phase in oil production where the hydrocarbon origins are discovered. Usually involves reading seismic data and drilling exploratory wells to verify initial predictions.The initial phase in petroleum operations that includes generation of a prospect or play or both, and drilling of an exploration well. Appraisal, development and production phases follow successful exploration.

Refining:-
The primary refining technique used to separate hydrocarbons and provide the ingredients for modern fuels is called fractional distillation. Hydrocarbons of different size and configuration usually have differences in boiling points that are large enough to use as a method of separation. By vaporizing them, they tend to float upwards until the hydrocarbons condense, which is where they are collected.

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