DWSIM/C3/Absorption-Column/English-timed
From Script | Spoken-Tutorial
| Time | Narration |
| 00:01 | Welcome to this tutorial on simulating an Absorption Column using CAPE-OPEN Unit Operation in DWSIM. |
| 00:09 | In this tutorial, we will learn to: simulate an Absorption Column, |
| 00:16 | use ChemSep column as CAPE-OPEN Unit Operation, |
| 00:20 | specify Thermodynamics in ChemSep column, |
| 00:24 | specify Pressure profiles & Method in ChemSep column. |
| 00:29 | To record this tutorial, I am using: DWSIM 5.2 (Classic UI) and Windows 10. |
| 00:39 | The process demonstrated in this tutorial is identical in other OS also such as-
Linux, Mac OS X or FOSSEE OS on ARM. |
| 00:51 | To practice this tutorial, you should know: |
| 00:56 | to add components to a flowsheet, |
| 01:00 | select thermodynamic packages, |
| 01:03 | add material streams and specify their properties. |
| 01:08 | The prerequisite tutorials are mentioned on our website. |
| 01:13 | You can access these tutorials and all the associated files from this site. |
| 01:19 | We will develop a flowsheet to determine Outlet stream properties after absorption. |
| 01:26 | Here we give compounds, inlet stream conditions and property package. |
| 01:32 | I have already opened DWSIM on my machine. |
| 01:37 | Go to File menu and select New Steady-state Simulation. |
| 01:43 | The Simulation Configuration Wizard window appears. |
| 01:48 | At the bottom, click on Next. |
| 01:52 | Now, in the Compounds search tab, type: Methane. |
| 01:57 | Select Methane from ChemSep database. |
| 02:01 | Next, add Ethane. |
| 02:05 | Similarly, add Propane. |
| 02:09 | Next, add N-Butane. |
| 02:13 | Next, add N-Pentane. |
| 02:17 | Next, add N-dodecane. |
| 02:21 | At the bottom, click on Next button. |
| 02:25 | Now comes Property Packages. |
| 02:28 | From Available Property Packages , double-click on Peng-Robinson. |
| 02:34 | At the bottom, click on Next button. |
| 02:38 | We are moved to Flash Algorithm. |
| 02:42 | From Default Flash Algorithm, select Nested Loops(VLE). |
| 02:48 | At the bottom, click on Next button. |
| 02:52 | Next option is System of Units. |
| 02:56 | Under System of Units, select C5. |
| 03:01 | Lastly, at the bottom, click on the Finish button. |
| 03:06 | Let us maximize the simulation window. |
| 03:10 | Now, let’s insert a feed stream that enters the Absorption Column. |
| 03:16 | On the right hand side of the main simulation window, go to Flowsheet Objects. |
| 03:22 | In the Filter List tab, type: Material Stream. |
| 03:27 | From the displayed list, drag and drop a Material Stream to the Flowsheet. |
| 03:33 | Click on the Material Stream “MSTR-000” to view its properties. |
| 03:40 | Let’s change the name of this stream to Absorbent Oil. |
| 03:45 | Now, we will specify the Absorbent Oil stream properties. |
| 03:51 | Select Flash Spec as Temperature and Pressure (TP), if not already selected. |
| 03:57 | By default, Temperature and Pressure are already selected as Flash Spec. |
| 04:03 | Change Temperature to 32 degree Centigrade and press Enter. |
| 04:09 | Change Pressure to 28 bar and press Enter. |
| 04:15 | Change Mass Flow to 12750 kg/h and press Enter. |
| 04:24 | Now, let us specify the feed stream compositions. |
| 04:29 | Under Composition, choose the Basis as Mole Fractions, if not already selected. |
| 04:37 | By default, Mole Fractions is selected as Basis. |
| 04:42 | Now, for Methane, enter the Amount as 0 and press Enter. |
| 04:49 | For Ethane, enter it as 0 and press Enter. |
| 04:54 | Similarly, for Propane, enter 0 and press Enter. |
| 05:00 | And for N-Butane, enter 0 and press Enter. |
| 05:06 | Next, for N-Pentane, enter 0 and press Enter. |
| 05:12 | For N-dodecane, enter 1 and press Enter. |
| 05:17 | On the right, click on this green tick to Accept Changes. |
| 05:22 | Now, drag and drop another Material Stream to the flowsheet. |
| 05:27 | Click on Material Stream “MSTR-001” to view its properties. |
| 05:33 | Let’s change the name of this stream to Feed Gas. |
| 05:38 | Now we will specify the Feed Gas stream properties. |
| 05:44 | Under Input Data, select Flash Spec as Temperature and Pressure (TP), if not already selected. |
| 05:52 | By default, Temperature and Pressure are already selected as Flash Spec. |
| 05:58 | Change Temperature to 41 degree Centrigade and press Enter. |
| 06:05 | Change Pressure to 28 bar and press Enter. |
| 06:10 | Change Mass Flow to 11840 kg/h and press Enter. |
| 06:19 | Now, let us specify the feed stream compositions. |
| 06:24 | Under Compositions, choose the Basis as Mole Fractions, if not already selected. |
| 06:32 | By default, Mole Fractions is already selected as Basis. |
| 06:38 | Now for Methane, enter the Amount as 0.2 and press Enter. |
| 06:45 | For Ethane, enter it as 0.4625 and press Enter. |
| 06:53 | Similarly, for Propane, enter 0.3 and press Enter. |
| 07:00 | And for N-Butane, enter 0.03125 and press Enter. |
| 07:08 | Next, for N-Pentane, enter 0.00625 and press Enter. |
| 07:18 | For N-dodecane, enter 0 and press Enter. |
| 07:23 | On the right, click on this green tick to Accept Changes. |
| 07:28 | Now, let’s insert two more material streams that exit the Absorption Column. |
| 07:34 | To do that, let us drag one Material Stream. |
| 07:38 | Let us now arrange it. |
| 07:41 | We will leave that stream as unspecified. |
| 07:45 | Then we will change the name of this stream to Lean Gas. |
| 07:51 | Next, we will insert another Material Stream. |
| 07:56 | Let us once again arrange it. |
| 07:59 | Leave that stream as unspecified. |
| 08:03 | And name this stream as Rich Oil. |
| 08:07 | Now, let us insert an Absorption Column into the flowsheet. |
| 08:12 | Go to Flowsheet Objects. |
| 08:15 | In the Filter list tab, type: CAPE. |
| 08:20 | Click on the CAPE-OPEN Unit Operation displayed. |
| 08:24 | Drag and drop it to the flowsheet. |
| 08:28 | Add CAPE-OPEN Unit Operation window opens. |
| 08:32 | Select ChemSep from the displayed list of Unit Operations.
Click Ok. |
| 08:40 | Click on the added CAPE-OPEN Unit Operation (COUO-004) |
| 08:47 | We will change the name of the object to Absorption Column. |
| 08:53 | Click on Open CAPE-OPEN Object Editor in the Object Property Editor window. |
| 09:00 | The New Unit Operation pop-up window appears. |
| 09:05 | Click on the field against Unit Name and type: Absorption Column. |
| 09:12 | Next, click on the drop-down against Operation. Select Simple Absorber/Stripper. |
| 09:22 | Next, click on the field against # Stages and enter 6. |
| 09:30 | Next, click on the field against Pressure and enter 2757906 Newton per meter square . |
| 09:41 | Then click on the drop-down against Thermo. Select ChemSep. Click Ok button. |
| 09:50 | Wait for a few seconds. |
| 09:53 | The ChemSep (CAPE-OPEN) -Absorption Column window will appear. |
| 09:58 | Close the ChemSep window by clicking the red cross button on the top right corner of the window. |
| 10:05 | Another pop-up appears in which we will click No. |
| 10:10 | First, we will connect the inlet feed streams and outlet streams with the Column. |
| 10:16 | Then specify the column properties. |
| 10:20 | Go to the left side of the window. |
| 10:23 | Under Connections, go to inlet section. |
| 10:27 | Click on the drop-down against Feed2_stage6 and select Feed Gas. |
| 10:37 | Next, click on the drop-down against Feed1_stage1 and select Absorbent Oil. |
| 10:48 | Go to Outlet section. |
| 10:51 | Then click on the drop-down against TopProduct and select Lean Gas. |
| 10:59 | Then click on the drop-down against BottomProduct and select Rich Oil. |
| 11:07 | Now, we will edit the properties of the Absorber. |
| 11:12 | Click on Open CAPE-OPEN Object Editor. |
| 11:18 | The ChemSep window opens. |
| 11:21 | Click on Properties on the left side of the ChemSep window. |
| 11:26 | Here, we will define the Thermodynamics, Physical Properties and Reactions taking place in the column. |
| 11:37 | First, we will define the Thermodynamics. |
| 11:41 | Click on the drop-down against K-value.
Select EOS. |
| 11:47 | Next, click on the drop-down against Equation of state and select Peng-Robinson 76. |
| 11:56 | A pop-up appears: Selection of new EOS model will reset model parameters, continue.
Click Yes. |
| 12:06 | Another pop-up appears: Use consistent EOS to compute enthalpy.
Click Yes. |
| 12:14 | Now, we will load the Thermodynamic Model parameters. |
| 12:19 | On the left side, click Load button. |
| 12:23 | Load interaction parameters window opens. |
| 12:27 | Select pr.ipd and click Open. |
| 12:32 | Available Peng-Robinson parameters for the selected compounds are displayed.
Click Load button. |
| 12:41 | There are no Physical Properties or Reactions to be defined. So, we will not specify them. |
| 12:49 | Now, we will see how to define Pressure profiles in ChemSep column. |
| 12:55 | Click on Pressures on the left side of the ChemSep window. |
| 13:00 | Click on the drop-down against Column Pressure. |
| 13:04 | Here, we can select the pressure type to specify for the column depending on pressure. |
| 13:11 | By-default, Constant pressure is selected. |
| 13:15 | We will not change that as the column is operated at constant pressure. |
| 13:20 | Enter 2757906 Newton per meter square against Top Pressure. |
| 13:28 | Click on Solve Options on the left side of the ChemSep window. |
| 13:33 | Here we will select the Method to solve the simulation. |
| 13:37 | Click on drop-down against Method. Select 2-pass ideal K + constant H first from the displayed list. |
| 13:48 | Now we will run the ChemSep simulation. |
| 13:52 | Click on the green button located at the top of ChemSep window. |
| 13:57 | This button is to check input of problem and solve. |
| 14:02 | A pop up window appears. Click Yes. |
| 14:06 | Click OK. |
| 14:08 | Click Yes. |
| 14:10 | Click Done |
| 14:12 | Close the ChemSep window. |
| 14:15 | Now, we will select a proper appearance icon for the Absorption Column. |
| 14:21 | Click on the Absorption Column. |
| 14:24 | Object Editor Window opens on the left side.
Locate Settings section. |
| 14:31 | Click on the drop-down against Flowsheet Object Appearance. |
| 14:36 | Select AbsorptionColumn from the drop-down. |
| 14:40 | For better appearance of the column, right click on the column and select Edit Appearance. |
| 14:47 | Edit Object Appearance window opens on the right. |
| 14:51 | We will change the length and height of the object. |
| 14:55 | Enter 75 against Length. |
| 14:59 | Enter 150 against Height. |
| 15:02 | Let us now arrange the flowsheet. |
| 15:05 | Now, solve the DWSIM flowsheet by pressing F5 button or clicking on Solve Flowsheet. |
| 15:14 | When the calculations are completed, we will check for the stream-wise material balance. |
| 15:20 | Go to Insert menu and select Master Property Table. |
| 15:25 | Double-click on the Master Property Table to edit it. |
| 15:29 | Configure Master Property Table window opens. |
| 15:33 | In the Name field, type: Stream Wise Results – Absorption Column. |
| 15:39 | In the Object Type, select Material Stream. |
| 15:43 | By default, Material Stream is already selected. |
| 15:47 | Under Properties to display, select Object as Absorbent Oil, Feed Gas, Lean Gas and Rich Oil. |
| 16:00 | Under Property, scroll down to see all the parameters. |
| 16:06 | Now select the properties as
Temperature, |
| 16:11 | Pressure,
Mass Flow, |
| 16:15 | Molar Flow, |
| 16:19 | Molar Flow (Mixture) / Methane, |
| 16:22 | Mass Flow (Mixture) / Methane, |
| 16:26 | Molar Flow (Mixture) / Ethane, |
| 16:29 | Mass Flow (Mixture) / Ethane, |
| 16:33 | Molar Flow (Mixture) / Propane, |
| 16:36 | Mass Flow (Mixture) / Propane, |
| 16:40 | Molar Flow (Mixture) / N-butane, |
| 16:43 | Mass Flow (Mixture) / N-butane, |
| 16:47 | Molar Flow (Mixture) / N-pentane, |
| 16:50 | Mass Flow (Mixture) / N-pentane, |
| 16:54 | Molar Flow (Mixture) / N-dodecane and
Mass Flow (Mixture) / N-dodecane. |
| 17:00 | Close this window. |
| 17:02 | Move the Master Property Table for better visibility. |
| 17:08 | Here, we see the corresponding results for Inlet and Outlet Streams. |
| 17:13 | Let's summarize. |
| 17:15 | In this tutorial, we have learnt to: simulate an Absorption Column, |
| 17:21 | use ChemSep column as CAPE-OPEN Unit Operation, |
| 17:25 | specify Thermodynamics in ChemSep column, |
| 17:29 | specify Pressure profiles & Method in ChemSep column. |
| 17:34 | As an assignment, repeat this simulation with different compounds and thermodynamics. |
| 17:41 | Watch the video available at following link. It summarizes the Spoken Tutorial project. |
| 17:49 | The Spoken Tutorial Project Team:
conducts workshops using spoken tutorials, |
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For more details, please write to us. |
| 18:02 | Please post your times queries in this forum. |
| 18:06 | The FOSSEE team coordinates conversion of existing flow sheets into DWSIM. |
| 18:12 | We give honorarium and certificates.
For more details, please visit this site. |
| 18:19 | The FOSSEE team coordinates coding of solved examples of popular books. |
| 18:25 | We give honorarium and certificates . For more details, please visit this site. |
| 18:32 | The FOSSEE team helps migrate commercial simulator labs to DWSIM. |
| 18:38 | We give honorarium and certificates. For more details, please visit this site |
| 18:45 | Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India. |
| 18:54 | This tutorial is contributed by Kaushik Datta and Priyam Nayak.
Thanks for joining. |
