DWSIM/C3/Absorption-Column/English
Visulal Cue | Narration |
Slide Number 1
Title Slide |
Welcome to this tutorial on simulating an Absorption Column using CAPE-OPEN Unit Operation in DWSIM. |
Slide Number 2
Learning Objective |
In this tutorial, we will learn to:
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Slide Number 3
System Requirements |
To record this tutorial, I am using
The process demonstrated in this tutorial is identical in other OS also such as-
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Slide Number 4
Pre-requisites |
To practice this tutorial, you should know to
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Slide Number 5
Prerequisite Tutorials and Files |
The prerequisite tutorials are mentioned on our website, spoken-tutorial.org
You can access these tutorials and all the associated files from this site. |
Slide Number 6
Mole Fraction(CH4): 0 Mole Fraction(C2H6): 0 Mole Fraction(C3H8): 0 Mole Fraction(C4H10): 0 Mole Fraction(C5H12): 0 Mole Fraction(C12H26): 1
Pressure: 28 bar
Mole Fraction(CH4): 0.2 Mole Fraction(C2H6): 0.4625 Mole Fraction(C3H8): 0.3 Mole Fraction(C4H10): 0.0315 Mole Fraction(C5H12): 0.00625 Mole Fraction(C12H26): 0
Pressure: 28 bar
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We will develop a flowsheet to determine Outlet stream properties after absorption.
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I have already opened DWSIM on my machine. | |
File >> New Steady-state Simulation | Go to File menu and select New Steady-state Simulation. |
Point to Simulation Configuration Wizard window | The Simulation Configuration Wizard window appears. |
Click on Next. | At the bottom, click on Next. |
Type Methane in the Search tab | Now, in the Compounds search tab, type Methane. |
ChemSep database >> Methane | Select Methane from ChemSep database. |
Type Ethane in the Search tab | Next, add Ethane. |
Type Propane in the Search tab | Similarly, add Propane. |
Type N-Butane in the Search tab | Next, add N-Butane. |
Type N-Pentane in the Search tab | Next, add N-Pentane. |
Type N-dodecane in the Search tab | Next, add N-dodecane. |
At the bottom, Click on Next. | At the bottom, Click on Next button. |
Point to Property Packages | Now comes Property Packages. |
Property Packages >> Available Property Package
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From Available Property Package list, double-click on Peng-Robinson. |
At the bottom, Click on Next button. | At the bottom, Click on Next button. |
Point to Flash Algorithm | We are moved to Flash Algorithm. |
Default Flash Algorithm >> Nested Loops (VLE) | From Default Flash Algorithm, select Nested Loops(VLE) |
At the bottom, Click on Next button. | At the bottom, Click on Next button. |
Point to System of Units | Next option is System of Units. |
System of Units >> C5 | Under System of Units, select C5. |
Click on Finish | Lastly, at the bottom, click on the Finish button. |
click on maximize button. | Let us maximize the simulation window. |
Go to Object Palette | Now let’s insert a feed stream that enters the Absorption Column. |
Point to Flowsheet Objects. | On the right hand side of the main simulation window, go to Flowsheet Objects. |
In the Filter List tab, type Material Stream | In the Filter List tab, type Material Stream. |
Click and drag Material Stream to the flowsheet | From the displayed list, drag and drop a Material Stream to the Flowsheet. |
Click on MSTR-000 | Click on the Material Stream “MSTR-000” to view its properties. |
Type Absorbent Oil | Let’s change the name of this stream to Absorbent Oil. |
Now we will specify the Absorbent Oil stream properties. | |
Input Data >> Flash Spec >> Temperature and Pressure (TP) | Select Flash Spec as Temperature and Pressure (TP), if not already selected.
By default, Temperature and Pressure are already selected as Flash Spec. |
Input Data >> Temperature >> 32 degC
Press Enter |
Change Temperature to 32 degC and press Enter. |
Input Data >> Pressure >> 28 bar
Press Enter |
Change Pressure to 28 bar and press Enter. |
Input Data >> Mass Flow >> 12750 kg/h
Press Enter |
Change Mass Flow to 12750 kg/h and press Enter. |
Now let us specify the feed stream compositions. | |
Composition>>Basis >> Mole Fractions | Under Composition, choose the Basis as Mole Fractions, if not already selected.
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Methane: 0 | Now for Methane, enter the Amount as 0 and press Enter. |
Ethane: 0 | For Ethane, enter it as 0 and press Enter. |
Propane: 0 | Similarly, for Propane, enter 0 and press Enter. |
N-Butane: 0 | And for N-Butane, enter 0 and press Enter. |
N-Pentane: 0 | Next, for N-Pentane, enter 0 and press Enter. |
N-dodecane: 1 | For N-dodecane, enter 1 and press Enter. |
Click Accept Changes | On the right, click on this green tick to Accept Changes. |
Now drag and drop another Material Stream to the flowsheet. | |
Click on MSTR-001 | Click on Material Stream “MSTR-001” to view its properties. |
Type Feed Gas | Let’s change the name of this stream to Feed Gas. |
Now we will specify the Feed Gas stream properties. | |
Input Data>>Flash Spec>>Temperature and Pressure(TP) | Under Input Data, select Flash Spec as Temperature and Pressure (TP), if not already selected.
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Input Data >> Temperature >> 41 degree C
Press Enter |
Change Temperature to 41 degree C and press Enter. |
Input Data >> Pressure >> 28 bar
Press Enter |
Change Pressure to 28 bar and press Enter. |
Input Data >> Mass Flow >> 11840 kg/h
Press Enter |
Change Mass Flow to 11840 kg/h and press Enter. |
Now let us specify the feed stream compositions. | |
Composition>>Basis >> Mole Fractions | Under Composition, choose the Basis as Mole Fractions, if not already selected.
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Methane: 0.2 | Now for Methane, enter the Amount as 0.2 and press Enter. |
Ethane: 0.4625 | For Ethane, enter it as 0.4625 and press Enter. |
Propane: 0.3 | Similarly, for Propane, enter 0.3 and press Enter. |
N-Butane: 0.03125 | And for N-Butane, enter 0.03125 and press Enter. |
N-Pentane: 0.00625 | Next, for N-Pentane, enter 0.00625 and press Enter. |
N-dodecane: 0 | For N-dodecane, enter 0 and press Enter. |
Click Accept Changes | On the right, click on this green tick to Accept Changes. |
Now let’s insert two more material streams that exit the Absorption Column. | |
Click and Drag Material Stream to the flowsheet | To do that, let us drag one Material Stream. |
Let us now arrange it. | |
We will leave that stream as unspecified. | |
Type Lean Gas | Then we will change the name of this stream to Lean Gas. |
Click and drag Material Stream to the flowsheet | Next, we will insert another Material Stream. |
Let us once again arrange it. | |
Leave that stream as unspecified. | |
Type Rich Oil | And name this stream as Rich Oil. |
Now let us insert an Absorption Column into the flowsheet. | |
Go to Flowsheet Objects | Go to Flowsheet Objects. |
In the Filter list tab, type Heat Exchanger. | In the Filter list tab, type CAPE. |
Click and drag CAPE-OPEN Unit Operation to the flowsheet | Click on the CAPE-OPEN Unit Operation displayed.
Drag and drop it to the flowsheet. |
Point to Add CAPE-OPEN Unit Operation | Add CAPE-OPEN Unit Operation window opens. |
Select ChemSep
Click Ok |
Select ChemSep from the displayed list of Unit Operations.
Click Ok. |
Click on the added CAPE-OPEN Unit Operation | Click on the added CAPE-OPEN Unit Operation (COUO-004) |
Type Absorption Column | We will change the name of the object to Absorption Column. |
Click on Open CAPE-OPEN Object Editor | Click on Open CAPE-OPEN Object Editor in the Object Property Editor window. |
The New Unit Operation pop-up window appears. | |
Unit Name >> Absorption Column | Click on the field against Unit Name and type Absorption Column. |
Operation >> Simple Absorber/Stripper | Next, click on the drop-down against Operation.
Select Simple Absorber/Stripper. |
# Stages >> 6 | Then click on the field against # Stages and enter 6. |
Pressure >> 2757906 N/m2 | Next, click on the field against Pressure and enter 2757906 N/m2 |
Thermo >> ChemSep
Click Ok |
Then click on the drop-down against Thermo.
Select ChemSep. Click Ok button. |
Point to ChemSep (CAPE-OPEN) -Absorption Column | Please wait for a few seconds.
The ChemSep (CAPE-OPEN) -Absorption Column window will appear. |
Close the ChemSep window by clicking the cross button on the top right corner of the window. | |
Another pop-up appears, in which we will click No. | |
First, we will connect the inlet feed streams and outlet streams with the Column.
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Go to Connections
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Go to the left side of the window.
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Click on drop down arrow against Feed1_stage1
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Next, click on the drop-down against Feed1_stage1.
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Click on the drop down against TopProduct
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Go to Outlet section.
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Click on the drop down against BottomProduct
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Then click on the drop-down against BottomProduct.
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Now we will edit the properties of the Absorber. | |
Click on Open CAPE-OPEN Object Editor. | Click on Open CAPE-OPEN Object Editor. |
Point to the window. | The ChemSep window opens. |
Click on Properties | Click on Properties on the left side of the ChemSep window. |
Here we will define the Thermodynamics, Physical Properties and Reactions taking place in the column. | |
First, we will define the Thermodynamics. | |
K-value >> EOS | Click on the drop-down against K-value.
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Equation of state >> Peng-Robinson 76
Click Yes |
Next, click on the drop-down against Equation of state.
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Click Yes | A pop-up appears:
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Click Yes | Another pop-up appears:
Click Yes. |
Now, we will load the Thermodynamic Model parameters. | |
On the left side, Click Load button. | On the left side, Click Load button. |
Load interaction parameters window opens. | |
Select pr.ipd >>Click Open | Select pr.ipd and click Open. |
Click Load button. | Available Peng-Robinson parameters for the selected compounds are displayed.
Click Load button. |
There are no Physical Properties or Reactions to be defined.
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Click on Pressures | Now, we will see how to define Pressure profiles in ChemSep column.
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Column pressure >> Constant pressure
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Click on drop-down against Column Pressure.
Enter 2757906 N/m2 against Top Pressure. |
Click on Solve Options | Click on Solve Options on the left side of the ChemSep window.
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Method >> 2-pass ideal K + constant H first | Click on drop-down against Method.
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Now we will run the ChemSep simulation. | |
Click on Check input of problem and solve | Click on the green button located at the top of ChemSep window.
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Click Yes. | A pop up window appears.
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Click OK. | Click OK. |
Click Yes. | Click Yes. |
Click Done. | Click Done |
Click on Close button. | Close the ChemSep window. |
Point to the icon. | Now we will select a proper appearance icon for the Absorption Column. |
Click on Absorption Column | Click on the Absorption Column. |
Flowsheet Object Appearance >> AbsorptionColumn | Object Editor Window opens on the left side.
Locate Settings section.
Select AbsorptionColumn from the drop-down. |
Point to Edit Object Appearance window. | For better appearance of the column, right click on the column and select Edit Appearance.
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Length >> 75 | Enter 75 against Length. |
Height >> 150 | Enter 150 against Height. |
Let us now arrange the flowsheet. | |
Click Solve Flowsheet | Now, solve the DWSIM flowsheet by pressing F5 button or clicking on Solve Flowsheet. |
When the calculations are completed, we will check for the stream-wise material balance. | |
Insert >> Master Property Table | Go to Insert menu and select Master Property Table. |
Double click on Master Property Table
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Double-click on the Master Property Table to edit.
Configure Master Property Table window opens. |
Type Steamwise Results – Absorption Column | In the Name field, type Stream Wise Results – Absorption Column. |
Select Material Stream | In Object Type select Material Stream.
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Object >> Absorbent Oil, Feed Gas, Lean Gas and Rich Oil | Under Properties to display, select Object as Absorbent Oil, Feed Gas, Lean Gas and Rich Oil. |
Configure Master Property Table>> Property | Under Property, scroll down to see all the parameters.
Now select the properties as Temperature Pressure Mass Flow Molar Flow Molar Flow (Mixture) / Methane Mass Flow (Mixture) / Methane Molar Flow (Mixture) / Ethane Mass Flow (Mixture) / Ethane Molar Flow (Mixture) / Propane Mass Flow (Mixture) / Propane Molar Flow (Mixture) / N-butane Mass Flow (Mixture) / N-butane Molar Flow (Mixture) / N-pentane Mass Flow (Mixture) / N-pentane Molar Flow (Mixture) / N-dodecane Mass Flow (Mixture) / N-dodecane |
Click on Close button. | Close this window.
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Let's summarize. | |
Slide Number 7
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In this tutorial, we have learnt to
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Slide Number 8
Pure Water: 176.4 lbmol/h
Pressure: 14.7 psia
Acetone : 3.53 lbmol/h Nitrogen: 136.55 lbmol/h Oxygen: 36.3 lbmol/h
Pressure: 14.7 psia
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As an assignment,
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Slide Number 9
About the Spoken Tutorial Project |
Watch the video available at following link.
It summarizes the Spoken Tutorial project. |
Slide Number 10
Spoken Tutorial Workshops |
The Spoken Tutorial Project Team
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Slide Number 11
Please visit this site Choose the minute and second where you have the question. Explain your question briefly. Someone from the FOSSEE team will answer them. |
Please post your times queries in this forum.
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Slide Number 12
DWSIM Flowsheeting Project |
The FOSSEE team coordinates conversion of existing flow sheets into DWSIM.
We give honorarium and certificates. For more details, please visit this site. |
Slide Number 13
TextBook Companion Project |
The FOSSEE team coordinates coding of solved examples of popular books.
We give honorarium and certificates . For more details, please visit this site. |
Slide Number 14
Lab Migration Project |
The FOSSEE team helps migrate commercial simulator labs to DWSIM.
We give honorarium and certificates. For more details, please visit this site |
Slide Number 15
Acknowledgements |
Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India. |
Slide Number 16
Thanks |
This tutorial is contributed by Kaushik Datta and Priyam Nayak.
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