Applying the gas-solid fluidized to continuous multi-stage chemical reactor, residence time distribution of catalyst and or reactant particles must be known.
Different residence time distribution functions would result different reactor performance for the identical apparatus and conditions.
Generally multi-stage fluidized bed are prefered, because the range of residence time of particles, in the bed is narrow downed, compared to that of the single-stage fluidized bed.
The theoretical equations of discharge probability and residence time distribution were derived in the case of multi-stage fluidized bed partitioned by internal walls with hole, and result were checked experimentally.