nigerian coal

Harga:

negotiable

Jumlah Pesanan:

Negara Asal:

Nigeria

Cara Pembayaran:

L/C

Kemas & Pengiriman:

25kg

Coal is a combustible sedimentary rock composed mostly of carbon and hydrocarbons. It is the most abundant fossil fuel, The energy in coal comes from the energy stored by plants that lived hundreds of millions of years ago in swampy forests. Over time, layers of dead plants at the bottom of the swamps were covered by layers of water and dirt, trapping the energy of the dead plants. The heat and pressure from the top layers turned the plant remains into coal.

Lignite – This is a brownish-black coal with high moisture and ash content, which has the lowest heating value of the four types of coal. It is considered an “ immature� coal that is still soft. It is used for generating electricity.Subbituminous coal – This is a dull black coal with a higher heating value than lignite.Bituminous Coal- It is the most commonly used type of coal for electric power generation. It is a dark, hard coal that has a higher heating value than lignite and subbituminous coal, but a lower heating value than anthracite.Anthracite – This is also known as " hard coal" that was formed from bituminous coal under increased pressures in rock strata during the creation of mountain ranges.Coal is used primarily as an energy source, either for heat or electricity. It was once heavily used to heat homes and power locomotives and factories. Bituminous coal is also used to produce coke for making steel and other industrial process heating. Coal gasification and coal liquefaction ( coal-to-liquids) are also possible uses of coal for producing synthetic fuel.

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