Buy Chemistry Engineering Lab Assignment

Buy Chemistry Engineering Lab Assignment
1. Switch on the computer.
2. At the big control panel on the wall, set the “UOP AREA EXTRACT FAN”
(selector on the left), at “Hand position”.
3. Switch on the Armfield console by the computer. Load the software in the
computer. Go to “View” and select “Diagram”.
4. Identify all components in Figure 1. All valves must be closed except for V5
(cooling water) and V10 (below the decanter).
5. Set the equipment to operate at total reflux: on the reflux controller of the
console, put the selector on Manual position and make sure the ON/OFF button
is not on (no green light).
6. In the small room where the rig is, open the red valve on the wall to get cooling
water to the condenser. Set the water rotameter (above valve V5) to 3000
ml/min.
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7. Choose options A or B and leave the apparatus for at least 30 minutes so that
the system can reach equilibrium conditions.
A. Automatic control using the software (PID1).
On the console, press the red button to activate the heater. Then put the selector
on I/O Port position to have it controlled from the computer. Press PID1 on the
screen’s diagram and set the following parameters:
Mode of operation: Automatic
Set point (T7): 77 oC
Proportional band: 50%
Integral time: 15 s
Derivative time: 0 s
B. Manual control using the console.
On the console, press the red button to activate the heater. Then put the selector
on Manual position. For about 5 minutes set the heat controller at high rate, 1.75
kW. Reduce to 0.85 kW once liquid starts flowing from the decanter back to the
5
column.
8. Start recording the data by clicking on .
9. Check that temperatures increase so that T1 reaches approximately 77 oC.
10. While the system is heating up, mark in Figure 1 the flow of products (cooling
water in blue and ethanol/water in red). The experiment takes place at total
reflux, so there will be no feed to the top product receiver or bottom product
receiver. It is a batch operation and takes place at normal pressure.
11. Take a sample of the distillate through valve V3 and a sample of the bottom
through valve V2. Use googles and gloves for this. CAUTION! SAMPLES ARE
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HOT! Keep the vials in an upright position.
Repeat this procedure every 10 min until at least 3 samples of both distillate
and bottom are obtained. Label them carefully as D1, D2, D3,…, B1, B2, B3,….
Take the samples to the lab with your supervisor, to learn how to use the
refractometer. Measure and register the refractive index for the different
samples.
12. Record the temperatures T1 to T8 to calculate the average top and bottom
column temperature.
13. Click on to stop recording the data and save the file as Excel 5.xls.
14. Cool down by pressing the red button in the console to turn off the heater.
Check that temperature is dropping down.
15. Switch off the cooling water (red valve on the wall).
16. Shut down everything when temperatures have dropped down:
16.1. Turn off the console and the computer.
16.2. On the wall panel (UOP Area extract fan), set it “Automatic”.
16.3. Dispose the samples in a safe manner, using googles and gloves: pour
them in the plastic jerry can available in the rig’s room, labelled as “WATER
AND ETHANOL”.
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Fig. 1. Schematic diagram of apparatus
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Fig.2. Display and control of reflux ratio
Fig. 3. Display and control of power to rebolier heating element
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Fig. 4. Display of distillation column temperature
Fig. 5. Display of distillation column temperature
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Experiment DC: Distillation Column
Data Sheet
Group Number: Group Members: Date: NB Wait 10 minutes before taking a fresh set of samples. Distillate composition- ethanol
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Reading Refractive index Composition Volatility
1
2
3
Average
Bottom Composition- ethanol
Reading Refractive index Composition Volatility