For this problem, the feed is 40 mol% heptane and 60 mol%

ethylbenzene. A saturated liquid feed of 200 kmol/h is to be fractionated at atmospheric pressure to give a distillate containing 98 mol% heptane and a bottoms product containing 1 mol% heptane.

1. Determine the molar flowrates of distillate and bottoms.

2. Calculate all internal flows for operation at a reflux ratio of 1.5.

3. Estimate the condenser and reboiler duties, in kW.

4. Estimate the top and bottom temperatures, in °C.

5. Design a tray tower with 18-in tray spacing to operate at 75% of flooding.

The active tray area is 75%. You should decide whether to design for the top or for the bottom of the column. There are 17 equilibrium stages with the feed on Stage 10.

6. Design a packed tower with 2-in, ceramic INTALOX™ saddles for 70% of flooding. You should decide whether to design for the top or for the bottom of the column.

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Vapor pressure data: For heptane, log10p* (mm Hg) = 6.90253 For ethylbenzene, log10p* (mm Hg) = 6.95650 Other data: Heptane Ethylbenzene MW 100 106 Liquid Density (kg/m³) 680 867 1267.828 T(C) +216.823 1423.543 T(C) +213.091 Normal Latent Heat (kJ/kmol) bp (°C) 98.4 136.2 35,600 35,900 Viscosity (CP) 0.3 0.35