Question: As a process engineer, your task is to design a debutanizer column operating at 1 atm, equipped with a partial reboiler and a total condenser.

As a process engineer, your task is to design a debutanizer column operating at 1 atm, equipped with a partial reboiler and a total condenser. The feed consists of 900 kg/h of propane, 180 kg/h of n-butane, and 210 kg/h of n-pentane, presented as a saturated vapor. The specific requirements from your customer are to achieve a 95% recovery of n-pentane in the bottoms and a 98% recovery of butane and lighter compounds in the distillate. For this process, reflux is returned as a saturated liquid, and it can be assumed that constant molal overflow (CMO) conditions apply. Moreover, equilibrium in the column is best represented by constant relative volatilities.

Determine
a) the total number of stages
b) the feed stage without Aspen simulation.
To achieve this, follow the steps to find N_min (Fenske equation), R_min (Underwood equation), R (relation between R and R_min), N (Gilliland correlation), and Nfeed (Kirkbride or Fenske equation).
Explain and show calculation for each part ?

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Debutanizer Column Design Given Feed composition Propane C3 900 kgh nbutane C4 180 kgh npentane C5 210 kgh Feed state Saturated vapor Operating pressu... View full answer

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