Reactor bottom pressure
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May I ask, should the pressure in the tower bottom be the bubble point pressure or the saturated vapor pressure?
The principle of distillation relies on the vapor pressures of various substances at specific temperatures, as well as the gas-liquid exchange that occurs across the tower plates, to achieve the goal of distillation (separation). The vapor pressure of each substance at a given pressure is an important parameter; the pressure in the reactor bottom is related to the physical properties of the substances and to the operating temperature, which in turn affects the purity achieved through distillation.
The saturated vapor pressure plus the hydrostatic pressure of the liquid column below, I guess.