This document discusses combustion calculations for various fuels and gases. It provides calculations for: 1) The weight of air needed for combustion of a gas mixture containing H2, CH4, CO, CO2, O2, and N2. 2) The volume of air needed to combust 1 liter of CO. 3) The volume of air needed to combust 1 m3 of a fuel gas containing CO, CH4, C2H2, N2, and CO2. 4) The mass of air needed to combust 5 kg of coal containing 80% carbon, 15% hydrogen.

1. COMBUSTION TUTORIAL
1. A gas is following composition by volume:
H2 = 20%, CH4 6%, CO 22%, CO2 4%, O2 4% and N2 44%. 20% excess air is used. Find
the weight of air actually supplied per m3 of this gas.
M.w of air= 28.97 gm/mol
2. Calculate the volume of air required for the complete combustion of 1 litre of CO.
3. Calculate the volume of air required for complete combustion of 1 m3 of gaseous fuel
having the composition CO 46%, CH4 10%, C2H2 2%, N2 % and remaining being CO2.
4. Calculate the mass of air needed for complete combustion of 5 Kg of coal containing
80% carbon, 15% hydrogen and rest is oxygen.
5. The percentage composition by mass of coal sample is as follows:
C=90%, H=3.5%, O=3%, N=1%, S=0.5% and rest=ash%
Calculate the theoretical volume of oxygen and air required at 27 deg C and 1 atm
pressure for the combination of 1Kg of coal. (R= 0.082 lit-atm/K.mole)
6. Calculate the weight and volume of air required to burn 1Kg of carbon
7. A petrol sample contains 84% carbon and 16% Hydrogen by weight. Calculate the
minimum air foe complete combustion of 1kg of petrol.
1 2143 g 2 2.38 litre 3 2.2857 m3
4 71.39 Kg 5 O2 = 2.04 m3 6 11.594 kg
Air = 9.775 m3 8.973 m3
7 15.304 kg