Fuels and Combustion
Higher fuel combustion efficiency can not be achieved by

Adopting proper fuel firing technique & fuel preparation
Reducing sulphur content in the fuel
Preheating of fuel gases & combustion air
Supplying correct amount of combustion air

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Fuels and Combustion
Fussain

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

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