It is under development a biomass gasification plant based on a 1 MWth bubbling fluidized bed (BFB) reactor with internal
recirculation. Compared to conventional BFB design, the mechanism of internal circulation of solids can give beneficial effect to
the process in terms of biomass conversion efficiency into gaseous product and gas quality. A model describing the process of
biomass gasification in the two reaction chambers was developed. Expected results were preliminarily validated by experimental
results obtained at a bench scale facility working on the same gasification concept.