Fuels and Combustion
By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of

None of these
Benzol
Tar
Ammonia

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Fuels and Combustion
Presence of free moisture in coal during its high temperature carbonisation

Reduces the coking time
None of these
Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls
Increases the loss of fine coal dust from the ovens when charging

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