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Mass of Air Required for Combustion of Fuel

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A coal fired boiler uses fuel having the following analysis by mass:

Carbon 81%, hydrogen 5%, oxygen 6 %, ash 8%.

A) Determine the minimum mass of air necessary for complete combustion of 1 kg of fuel.

B) If 40% excess air is supplied, determine the percentage composition of the dry exhaust gases by mass.

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Solution Summary

The mass of air required for combustion of fuel is calculated.

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Please see the attached file.

A/ DETERMINE THE MINIMUM MASS OF AIR NECESSARY FOR COMPLETE COMBUSTION OF 1 KG OF FUEL.

The minimum amount of air is the amount of air that will be sufficient for reacting with all C according to the reaction:
C + O2 = CO2
For every 1 kg of fuel, we have 0.81 kg ...

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