The moisture content of the most biomass fuel depends on the type
of fuel, it´s origin and treatment before it is used for gasification.
Moisture content of the fuel is usually referred to inherent moisture plus
surface moisture. The moisture content below 15% by weight is desirable for
trouble free and economical operation of the gasifier. Higher moisture contents
reduce the thermal efficiency of gasifier and results in low gas heating values.
Igniting the fuel with higher moisture content becomes increasingly difficult,
and the gas quality and the yield are also poor