Fuels and Combustion
Fussain

Is friable, charcoal like substance
All of these
Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation
Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal

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Fuels and Combustion
Coke oven gas is a better fuel than blast furnace gas, because of its higher

All of these
Heat release rate (thus requiring smaller combustion chamber)
Adiabatic flame temperature
Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)

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