1.0 PROCEDURE

1.Open ASPEN HYSYS software and click “New Case”.

2. Click on the component list on the left side of the monitor.

3. Select the component that are exist in the whole system.

4. The components used are shown in Table 1:

Component Component Type Formula

1. Methanol Pure Component CH3OH

2. Water Pure Component H2O

Table 1: Components List

Figure 1:Component List

5.The fluid packaging used for this simulation, which was Peng-Robinson, was selected from the

list of property packages.

Figure 2 : Fluid Package

6.The “Simulation” is clicked on the bottom left tab to open the worksheet of the system.

7. The palette is appeared, where all the equipment icons are shown.

Figure 3: Palatte

8. The Tee was double clicked to open up the material stream form and the following

information was added as shown on Table 3:

Conditions Value

Pressure (kPa) 5.2

Temperature (°C) 25

Molar Flowrate (kg-mol/hr) 2700

Components Compositions

Ammonia 0.50

Water 0.50

Figure 5: Conditions Tee

9. The two Distillation column is icon was double clicked and the default name of the stream

was named as shown on the Table 4:

Condition DC1 DC2

Pressure (bar) 5.2 1.01

Number of trays 16 13

Feed Tray 12 9

Reflux ratio 1023 0.834

Distillate to feed ratio 0.96 0.96Table 4 : Conditions for two DC1 and DC2

Figure 6: Connections of DC1

Figure 7: Feed Ratio of DC1

Figure 8: Connections of DC2

Figure 9: Feed Ratio of DC2

10. The valve icon then double clicked to open up the material stream form and added as a input

for DC2 to reduced the pressure inlet which 1.01 Bar.

Figure 10: Conditions Valve

2.0 PROCESS FLOW DIAGRAM

Figure 11: Process Flow Diagram

Figure 11: Process Flow Diagram

2.0 WORKBOOK

Figure 12: Streams

Figure 13: Compositions

Figure 14: Energy Streams

4.0 QUESTIONS AND DISCUSSION

1) What is molar flowrate before entering DC1 and DC2?

The molar flowrate before entering DC1 and DC2 is same which are 1350 kgmole/hr. Both

distillation columns have a same molar flowrate because the split ratio used in this system is 0.5.

So, the molar flowrate in Tee stream will be halved in DC1 and DC2.

2) How to reduce pressure in DC 2?

In order to reduce pressure in DC2, the valve is used in the system. The reason of using valve

because valve can control the flow for example slurries, liquid and etc, by opening, closing, or

partially open or close the way or the flow of the fluid . So that, the pressure drop of the flow can be

reduced and changed.

3) What is the temperature at the bottom of DC1 and DC2?

The temperature at the bottom of DC1 and DC2 is 142.4 and 97.80 °C respectively. The temperature

is increasing from its feed temperature which is 25 and 25.12 °C respectively. It is because due to

the reflux and boiler at the distillation column.

4) Did the process achieve a methanol that free from water? What is the purity of the methanol?

How to increase the purity?

Yes, the methanol is free from water. It is because of the composition of methanol that nearly

achieved 1 which is 0.9998. The purify of the methanol is the process for treating methanol from

other impurities material such as waters , organic materials and etc and achieve 99.9 mole percent

pure methanol product . The purification of methanol is 99.98 mole %. In order to increase the

purity, the concentration of the substance must be lower. Besides, the usage of control valve also

can increase the purity by increasing the feed rate.