This invention discloses a fixed-
fluidized bed reactor for multiphase catalytic reactions. "Fixed" refers to fixing a hollow support material within the reactor, while "fluidized" refers to the process where, after gaseous or liquid feedstocks are introduced into the hollow porous material cavity, the catalyst encapsulated within the cavity is subjected to
buoyancy by the gas and liquid phases, resulting in a regional fluidized state within the cavity. The fixed-
fluidized bed reactor comprises, from bottom to top, a feedstock inlet, a catalyst filling inlet, and a reaction outlet inlet, with a circulation inlet and an auxiliary control inlet at the side. The gaseous, liquid, or gas-liquid mixed feedstocks contact the hollow porous material through the connecting holes on the grid plate and then enter the cavity through the pores on the material surface. The catalyst
powder filled inside is fluidized within the cavity under the disturbance of the gaseous, liquid, or gas-liquid mixed phases. An external
magnetic field or
microwave can further promote the
fluidization of the catalyst
powder, increasing the
collision probability between the reactants and the catalyst
powder, thereby improving
catalytic efficiency.