In theory, 1 ton biomass steam generator can produce 1 ton of superheated steam.
There are many types of biomass, depending on what you are, and the amount of heat generated is different. The change in energy in the reaction is related to the chemical bonds when the material is composed.
The reactants participate in the reaction to disassemble the chemical bonds, absorb energy, and form products. New deterioration reductions need to release energy.
The energy of the two is different, so there is energy change, which is usually expressed in the form of thermal energy.