BIOMASS TORREFACTION IN A FLUIDIZED BED FOR SUBSEQUENT ENTRAINED-FLOW GASIFICATION

摘要

Disclosed are a method and an apparatus for producing biocoke from plant biomass, said biocoke being suitable for gasification in an entrained-flow reactor. The method includes the steps of comminuting, drying, and mixing the biomass and subjecting the comminuted biomass to torrefaction until a solid residue is formed. The torrefaction process is carried out in a fluidized-bed system that comprises a bed region having a high solid concentration and a free space thereabove having a low solid concentration.