Fuels and Combustion
In high temperature carbonisation of coal compared to low temperature carbonisation

H₂ content in the coke oven gas is more
Calorific value of the coke oven gas is lower
Yield of ammonia is less
Aromatic content of tar is low

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Fuels and Combustion
Lignite is

Can be used for gasification and steam generation
A coking coal
A black banded coal which burns with a non-smoky yellowish flame
A high rank coal

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