Question: 1. A distillation column with a total condenser is separating a mixture that is 20 mole% ethanol and 80 mole% water. The feed is saturated

1. A distillation column with a total condenser is separating a

1. A distillation column with a total condenser is separating a mixture that is 20 mole% ethanol and 80 mole% water. The feed is saturated liquid. Feed flow rate is 100kmoles/hr. Reflux is returned as saturated liquid. Desired distillate composition is 80 mole% ethanol and desired bottoms composition is 2 mole % ethanol. Instead of using a reboiler, a saturated vapor stream (S) of 4% ethanol in water is fed directly into the bottom of the column. Constant molal overflow is assumed. NA 1) Plot the feed line in the McCabe Thiele diagram provided. ii) Calculate the minimum reflux ratio. iii) For an actual reflux ratio of R = 3 Rmin, find the total number of stages needed for the separation and the optimum feed stage. iv) When may you use intermediate condensers and what are their advantages

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