A generator gas ( producer gas ) is a type of fuel in the gas phase ( gas that produces thermal energy ) which is produced by the transfer of air or steam through the hot charcoal layer or a layer of another combustible material produced from coal . Such gas has the following composition ( volumetric percentages ) :
8.0 % CO2 , 23.2 % CO , H2 17.7 % , 1.1 % CH4 , 50% N2 .
How many liters of air ( which is at a temperature of 32 ° C and 4 atmospheres pressure ) are required for complete combustion of 144 liters of gas generators , in the same conditions ? ( Hint: of gases comprising the gaseous fuel , which are the three flammable ? ) Given that the composition of air is 21 % oxygen and the rest nitrogen ( molar percentage ) .