1. Methanol-Water Batch Distillation Prepared by: Jason Hixson Don Scott Michael Hickey December 2, 2005 UTC ENCH 435

2. Objective Equipment Heat Loss Flooding Reboiler and Reflux composition VLE Data for the column trays Materials Balance Conclusions Outline:

3. Objective Observe and analyze performance of batch distillation.

4. Equipment

6. Analysis Calculation of the overall heat transfer coefficient, U, was done using the following equation. T R(0) =Reboiler Temp at time=0 T A = Ambient Temperature T R =Reboiler Temp at time=t Using this equation as a model we were able to fit U to best fit our data range. Reboiler T R, m, Cp TATA A Column

8. Heat Loss without Heat Input 102 W 120 W 121 W 102 W156 W 151 W 156 W 300 W Heat Loss with Pure Methanol Heat Loss with Pure Water 52 W95 W Water QL=858 W Methanol QL=497 W

10. Condenser Equations: Q=m*Cp*ΔT Q=UA ΔT LM Estimated A= 1325 cm 2 x the % of Condenser used Water:Methanol: Q=1.13 kWQ=0.88 kW Water, T 2 Water, T 1 VaporLiquid Enters and Exits at T 3

11. Flooding

12. Liquid,x Vapor, y VLE Diagram

13. Reboiler Composition vs. Time 0% Reflux: 3200 W 75% Reflux: 2500 W Initial x m : 23%Initial V m : 16.86 L 75% Reflux 0% Reflux

14. Reflux Composition vs. Time Collected 1.9 L/hr at 75% Reflux Collected 6.1 L/hr at 0% Reflux 0% Reflux 75% Reflux

15. VLE Diagrams VLE Data for Column Trays: Methanol-Water VLE 75% Reflux

16. VLE Diagrams Continued VLE Data: Methanol-Water VLE 75% Reflux

17. Material Balance Reboiler M, x A Distillate M F, x A x AI *M=x AF *M 75% Reflux x AI =23 mol % MeOH x AF =98 mol % MeOH M F =6.3 g MeOH/min 0% Reflux x AI =23 mol % MeOH x AF =30 mol % MeOH M F =101.5 g MeOH/min

18. Conclusions At 75% reflux the purity of methane was at much higher quality. If quality is more important then a high reflux percentage is needed. If quantity and timeliness is more important then a low reflux is needed.