The fluidized bed (FB) two-stage gasification process has recently been proposed to produce clean fuel.Catalytic tar removal in a mini FB two-stage apparatus was studied by char catalytic reforming technique.It was found that tar removal was strongly related to reaction temperature

gas residence time in tar reformer

and char specific surface area and porous structure.In the range of experimental conditions

increasing reaction temperature and residence time effectively promoted catalytic reforming of tar and generated more useful gas components.Larger specific surface area and more advanced porous structures of char catalysts delivered better effects on catalytic tar removal.Compared to thermal cracking

char catalytic reforming of tar was more effective in tar removal

production of more useful gas components

and better inhabitation of carbon deposition.The study showed that the suitable operational condition for tar removal by char catalyst in FB two-stage gasification process was temperature of 1000℃ and gas residence time above 0.9 s.