Sheet1Estimating dew point and bubble point using Microsoft ExcelFrom previous chapter, we getDistillate, D=95.6103Bottom, B=154.7063

From journal, it says that distillation is not feasible at atmospheric pressure.According to journal also, the system pressure must be under vacuum to make the distillation feasible.So, we take 20 KPa as our system pressure.

From Antoines's Equation

log P*= A -B/T+C

For estimating the dew pint of top distillate.

ABCP* (in mm Hg)P* (in KPa)Trial T ( C)Pt (KPa)6.978511495.58209.55962.58125562368.343481218579.0479144344206.2553912.87109.1325.3629266723.3814454547.13451516.07174.5714.34591543811.9126314234

Using Excel Solver

compyikiixiC (LD)0.980.41717406092.46743037320.9520590206D (HD)0.020.169072272710.0479416193A00.09563157120.56562539580sigma xi=1.0000006399

Estimating bubble point for bottom product

ABCP* (in mm Hg)P* (in KPa)Trial T ( C)Pt (KPa)6.978511495.58209.559272.800927491136.3704657606119.670709298206.2553912.87109.13184.287524015824.56964917227.13451516.07174.5795.94400832712.791482426

Using Excel Solver,

compxikiiyiC (LB)0.0121.8185232881.48030057350.0218222795D (HB)0.5881.228482458610.7223476857A0.40.63957412130.52062128910.2558296485sigma yi=0.9999996136 LD =2.4674303732 LB =1.4803005735, L, avg=1.911161583Log , L, avg=0.2812974069To find the minimum number of stages, we use equation 11.7-12 from Transport Processes and Separation Principles Book,Nm =log [(X,LD*D/X,HD*D)(X,HW*W/X,LW*W)]/Log , L, avglog [(X,LD*D/X,HD*D)(X,HW*W/X,LW*W)] =3.3809826

Nm =12.0192455275minimum number of stagesUsing shortcut Method from Transport Processes and Separation PrinciplesBook to find the number of stages at operating Reflux ratio. From journal, R= 2.18R= 1.5 RmRm= 1.4533333333Using Embar and Maddox empirical correlation, we getR/R+1 =0.6855345912Rm/ Rm+1 =0.5923913043We plot using this value into Erbar- Maddox correlation figure, We get Nm/ N = 0.59So, N =Nm/ 0.59N=20.3716025889theoretical stagesTherefore, the number of theoretical stages that we need to produce 75000Mton/yr of Cyclohexanol is 21stagesminus 1 Reboilerat top dew point of 79.05 Cand bottom bubble point of 119.67 C

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