seperation process

2. A steady-state, countercurrent staged distillation column is to be used to separate ethanol from water. The feed is a mixture of 40 wt% ethanol and 60 wtwater mixture at 20C. Flow rate of feed is 20,000 kg/hr. The column operates at a pressure of lkg/cm. The reflux is cooled to 40 C. A reflux ratio of Lo/D-2.5 is being used. We desire a bottoms composition of XB=0.002 (weight fraction ethanol) and a distillate composition of Xp=0,91 (weight fraction ethanol). The system has a total condenser and a partial reboiler. (a) Find the mumber of equilibrium stages for problem 2 above. Use the Ponchon-Savarit analysis and step of stages on the Ponchon-Savarit diagram. Data is given in Figure 2-4. (b) Find D, B.Q.Qr using the Ponchon-Savarit diagram to find rates D/B. Q.D. and Qr/B. 600 600 500 Der Ans 500 Aurlan Line for Interpolating Equrub Componenty 400 400 Enthalpy, KCAL KO 300 300 . 2 79.5" 254 24 63 78 7765 200 200 rothermal til Antare Composition 100 100 Aling Line Ikg/cm! 100 de 8074 601 40" Zloud Water oc o Freeze Solid Ice 03 -100 02 di 7 99 08 dis d4 ds 06 Concentration of Alcohol, Weight Fraction -100 Gyor