DETERMINATION OF MINIMUM QUANTITY OF AIR REQUIRED FOR COMPLETE COMBUSTION OF GASEOUS FUEL

Let the volumetric analysis of gaseous fuel be known. The chemical equations for gaseous fuel are as follows:

1. 2H₂ + O₂ → 2H₂O2 volumes of H₂ + 1 volume of O₂ → 2 volumes of H₂Oor 1 volume of H₂ +  volume of O₂ → 1 volume of H₂O
2. 2CO + O₂ → 2CO₂2 volumes of CO + 1 volume of O₂ → 2 volumes of CO₂
3. CH₄ + 2O₂ → 2H₂O + CO₂1 volume of CH₄ + 2 volumes of O₂ → 2 volumes of H₂O + 1 volume of CO₂
4. C₂H₄ + 3O₂ → 2H₂O + 2CO₂1 volume of C₂H₄ + 3 volumes of O₂ → 2 volumes of H₂O + 2 volumes of CO₂

Let the volume fraction of the gaseous fuel contain H₂, CO, CH₄, C₂H₄, CO_2, and N₂, the last two being incombustible gases.

The quantity of O₂ required m³/m³ of gas

Air contains 21% of O₂ by volume.

Quantity of air required