Reactive distillation is a separation operation/ process that combines both distillation& chemical reaction in a single unit.
For equilibrium limited reactions, there is continuous removal of products driving the reaction closer to completion. Here, the rectification column is divided into artificial segments assuming that the leaving liquid & vapor streams are at thermodynamic equilibrium at each stage.
The non- equilibrium limited reactive distillation takes into account both reaction rates & mass transfer fluxes. It is assumed that the bulk phases of vapor & liquid are well mixed and the mass transfer resistances are located in films near the interface.