Different Types of Coal | Properties | advantages and disadvantages | Electronicsinfos

Types of Coal

There is 6 Type of solid coal fuels that are used in power generation to produce Electricity. These different coal types have different efficiency. The different types of coal are described below.

Types of Coal

1. Peat Coal 
2. Lignites Coal
3. Bituminous Coal
4. Anthracite Coal
5. Wood Charcoal
6. Coak

Peat Coal 

peat coal is an initial state of coal. This is the raw state of coal if we want to use we need to dry the coal in sunlight. The calorific percentage in peat coal is 3500 kcal/kg. we used peat coal for domestic purposes because of the low value of the calorific.

Lignites Coal

Lignite coal is the second form of coal in which the humidity level is 30-40% and its colour is brown. we cannot use lignites in power plants because the coal residual quantity is high. The calorific percentage in Lignites coal is 5000 kcal/kg.

Bituminous Coal

Bituminous coal is used as burning fuel. The calorific percentage in Bituminous coal is 7800Kcal/kg. Bituminous Coal produces yellow gas including CO, CO₂, CH₄, H, N₂ and O₂.

Anthracite Coal

The Calorific percentage in Anthracite coal is 8500Kcal/kg.its burns with blue light. Anthracite coal is the last stage of coal and is mostly used in power plants to produce steam.

Wood Charcoal

wood coal is obtained when we slowly burn the wood. this is limited for domestic purposes because of the low value of the calorific percentage.

Coak

when all types of gasses are extracted from coal this state is called coak. This type of coal is used in furnaces.

Properties of Coal

There are some properties of good coal that are described below

• The calorific percentage must be high.
• The residual ash must be low.
• the sulphur percentage must be low.
• The external environment does not have much effect.
• we can also use it in powder form when needed.

Advantages 

• We can easily shift solid fuel.
• we can easily store it for a long time.
• solid fuel is naturally available.
• solid fuel is less effect on the environment.
• The cost is low.

Disadvantages

• We need a large space for storage purposes.
• The Environment is an effect by pollution.
• Thermal efficiency is low.
• We need large labour.

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