Series combination fluidized bed reactor unit comprising a cyclonic plenum assembly, and associated method of hydrofluorination

Embodiment series coupled fluidized bed reactor unit (10) is provided. In one embodiment, reactor unit comprises a primary and a secondary reactor (12, 14). The primary reactor includes a reaction vessel (16), a gas distributor which is fluidly connected to the reaction vessel (20), a cyclonic plenum assembly (22). Cyclonic plenum assembly plenum assembly housing having an annular side wall (74) and (70), the secondary reactor partially reacted gas / solid fluidly connecting the outlet of the gas plenum assembly housing of and an inlet pipe (72). Gas / solid inlet tube by inducing a vortex flow in the plenum assembly housing of partially reacted gas is received through the gas / solids inlet pipe from the secondary fluidized bed reactor, to the gas distributor before entering, to facilitate cyclonic separating entrained solids from the partially reacted gas, it is positioned tangentially relative to the annular side wall of the plenum assembly housing. .The