The progress of developing the multistage fluidized bed technology in Tsinghua University was reviewed in the present work.First part presents the experiment on cold model fluidized bed to determine the operating regime

the relationship of height of dense phase of solids in different stages with gas velocity and the structure of downcomer.Second part described the application of reactor structure above in hydrogenation of nitrobenzene to aniline

ammoxidation of m-xylene

synthesis of methanol

vinyl chloride monomer from acetylene

and synthesis of carbon nanotube. The structure of multistage bed is adaptable to special processes

calling for the temperature shift

different gas atmosphere

high conversion of gas reactants or long catalyst life time.Finally

the industrial scale application was addressed

which broaden the application of multistage fluidized bed in heterogeneous catalytic processes.