Energy content of fuel is obtained in most cases in an adiabatic,
constant volume bomb calorimeter. The values obtained are higher heating values
which include the heat of condensation from water formed in the combustion of
fuel. The heating values are also reported on moisture and ash basis. Fuel with
higher energy content is always better for gasification. The most of the biomass
fuels (wood, straw) has heating value in the ragne of 10-16 MJ/kg, whereas
liquid fuel (diesel, gasoline) posses higher heating value.