A solution of carbon tetrachloride and carbon disulfide containing 50 wt% each is to be continuously fractionated at standard atmospheric pressure at the rate 4000 kg/h. The distillate product is to contain 95wt % carbon disulfide, the residue 0.05%. The feed will be 30 mol % vaporized before it enters the tower. A total condenser will be used, and reflux will be returned at the bubble point. Equilibrium data, x, y = mole fraction CS₂.

find:

a. Determine the product rates, kg/h.

b. Determine the minimum reflux ratio.

c. Calculate the minimum number of ideal plates.

d. Determine the number of theoretical trays required at a reflux ratio equal to twice the minimum and the position of the feed tray.

e. Using the temperature of the distillate as the base temperature, calculate the enthalpy of the feed, products and steam entering the products and steam entering the condenser. Calculate the heat loads of the condenser and reboiler.

T, C X y T, C X y* 76,7 0 0 59,3 0,3908 0,6340 0,7470 74,9 0.0296 0,0823 55,3 0,5318 73,1 0,06 15 0,1555 52,3 0,6630 0,8290 70,3 0,1106 0,2660 50,4 0,7574 0,8780 68,6 0,1435 0,3525 48,5 0,8604 0,9320 63,8 0,2585 0,4950 46,3 1,0000 1,0000 additional data: Cp(CS2) = 0,24 kcal/kg. C CP(CCl4) = 0,21 kcal/kg. C A(CS2) = 6550 kcal/kgmol A(CCl4) = 7400 kcal/kgmol = =