Fuels and Combustion
The main drawback of supplying more excess air in the combustion of fuel is the

Enhanced sensible heat loss in the flue gas
Intermittant and uncontrolled combustion of the fuel
High exit flue gas temperature from the furnace
Excessive power requirement of air blower

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Fuels and Combustion
Anthracite coal

Ignites more easily than bituminous coal
Contains more volatile matter than bituminous coal
Is essentially a coking coal
Burns with short, bluish, yellow-tipped flame producing very little smoke

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