DWSIM/C2/Conversion-Reactor/English-timed
From Script | Spoken-Tutorial
| Time | Narration |
| 00:01 | Welcome to this tutorial on simulating a Conversion Reactor in DWSIM. |
| 00:07 | In this tutorial, we will learn to: |
| 00:10 | Define a Conversion Reaction |
| 00:13 | Simulate a Conversion Reactor |
| 00:16 | Calculate Conversion percentage from Conversion function |
| 00:21 | To record this tutorial, I am using
DWSIM 5.2 (Classic UI) and Windows 10 |
| 00:31 | The process demonstrated in this tutorial is identical in other OS also such as-
Linux, Mac OS X or FOSSEE OS on ARM. |
| 00:43 | To practice this tutorial, you should know to- |
| 00:47 | Add components to a flowsheet. |
| 00:50 | Select thermodynamic packages. |
| 00:53 | Add material and energy streams and specify their properties. |
| 00:58 | The prerequisite tutorials are mentioned on our website. |
| 01:03 | You can access these tutorials and all the associated files from this site. |
| 01:09 | We will develop a flowsheet to determine the exit composition from an isothermal Conversion Reactor. |
| 01:17 | Here we give Reaction, Property Package and Inlet Stream Conditions. |
| 01:23 | Next, we give Reaction Parameter and Reaction Conversion. |
| 01:28 | I have already opened DWSIM on my machine. |
| 01:33 | Go to File menu and select New Steady-state Simulation. |
| 01:40 | Simulation Configuration Wizard window appears. |
| 01:44 | At the bottom, click on the Next button. |
| 01:48 | Now, in the Compounds Search tab, type Carbon monoxide. |
| 01:54 | Select Carbon monoxide from ChemSep database. |
| 01:58 | Similarly, add Hydrogen. |
| 02:02 | Next, add Methanol. |
| 02:05 | And then at the bottom, click on the Next button. |
| 02:10 | The Property Packages opens. |
| 02:13 | From Available Property Packages list, double-click on Raoult’s Law. |
| 02:19 | Then click on the Next button. |
| 02:23 | We are moved to a new window named Flash Algorithm. |
| 02:28 | From Default Flash Algorithm select Nested Loops(VLE) |
| 02:35 | Click on the Next button. |
| 02:38 | The next option is System of Units. |
| 02:42 | Under System of Units, we will select C5. |
| 02:47 | Then at the bottom, click on the Finish button. |
| 02:52 | Let us now maximize the simulation window. |
| 02:56 | Now let’s insert a feed stream that enters the Conversion Reactor. |
| 03:01 | On the right hand side of the main simulation window, go to Flowsheet Objects. |
| 03:08 | In the Filter List tab, type Material Stream. |
| 03:13 | From the displayed list, drag and drop a Material Stream to the Flowsheet. |
| 03:19 | Let’s change the name of this stream to Feed. |
| 03:24 | Now we will specify the Feed stream properties. |
| 03:29 | Go to Input Data. |
| 03:32 | Select Flash Spec as Temperature and Pressure (TP), if not already selected. |
| 03:38 | default, Temperature and Pressure are already selected as Flash Spec. |
| 03:45 | Change Temperature to 320 degree Centigrade and press Enter. |
| 03:52 | Change Pressure to 70 bar and press Enter. |
| 03:58 | Change Mass Flow to 1500 kg per hour and press Enter. |
| 04:04 | Now let us specify the feed stream compositions. |
| 04:09 | Under Composition, choose the Basis as Mole Fractions, if not already selected. |
| 04:18 | By default, Mole Fractions is already selected as Basis. |
| 04:24 | Now for Carbon monoxide, enter the Amount as 0.2 and press Enter. |
| 04:33 | For Hydrogen, enter 0.8 and press Enter. |
| 04:40 | Similarly, for Methanol, enter 0 and press Enter. |
| 04:47 | On the right, click on this green tick to Accept Changes. |
| 04:52 | Next, we will define the Conversion Reaction. |
| 04:56 | Under Tools, click on Reactions Manager. |
| 05:02 | Chemical Reactions Manager window opens. |
| 05:06 | Under Chemical Reactions tab, click on the green coloured Add Reaction button. |
| 05:13 | Then click on Conversion. |
| 05:16 | Add New Conversion Reaction window opens. |
| 05:20 | Under Identification, enter the Name as Methanol Synthesis. |
| 05:27 | Now let’s enter the Description. |
| 05:31 | “Synthesis of Methanol from Carbon monoxide and Hydrogen.” |
| 05:37 | Next part is a table of Components/Stoichiometry. |
| 05:42 | The first column Name shows the available components here. |
| 05:47 | The second column corresponds to its Molar Weight. |
| 05:51 | The next column is Include.
Under Include, check all the check-boxes. |
| 05:58 | The fourth column is BC. |
| 06:01 | Under BC, check the Carbon monoxide check box as conversion is defined in terms of Carbon monoxide. |
| 06:10 | Next column is Stoichiometric coefficients |
| 06:14 | Under Stoichiometric coefficients column, enter: -1 for Carbon monoxide , -2 for Hydrogen and 1 for Methanol. Then press Enter. |
| 06:29 | In the Stoichiometry field, we can see it shows OK. |
| 06:34 | So the reaction is balanced after entering the stoichiometric coefficients. |
| 06:40 | Here the Equation field shows the reaction equation. |
| 06:45 | Then comes Conversion Reactions Parameters. |
| 06:49 | The Base comp is already indicated as Carbon monoxide. |
| 06:54 | Select Phase as Vapor. |
| 06:58 | Now go to Conversion. |
| 07:01 | In a Conversion Reaction, conversion can be defined in two ways. |
| 07:06 | First, conversion is defined directly as percentage (%). |
| 07:11 | Suppose, it is provided that reactant undergoes 50% conversion. |
| 07:18 | Then we have to enter 50 against Conversion. |
| 07:23 | Secondly, conversion can be defined as a function of temperature. |
| 07:29 | As per the problem statement, conversion function is given as
267.45 minus 0.591 into T where T is in degree Celsius. |
| 07:45 | But in the reaction manager, it can be seen that T is in Kelvin. |
| 07:51 | So we will modify the function and enter the conversion as 267.45 minus 0.591 into in bracket T minus 273.15 |
| 08:08 | This “-273.15” is to incorporate the change in temperature from Kelvin to Degree Celsius. |
| 08:17 | At the bottom, Click on OK button.
And then close the Chemical Reactions Manager window. |
| 08:25 | Now let us insert a Conversion Reactor to the flowsheet. |
| 08:30 | Go to Flowsheet Objects. |
| 08:33 | In the Filter List tab, type Conversion Reactor.
Drag and drop it to the flowsheet. |
| 08:42 | Let us now arrange it as required. |
| 08:47 | And name this reactor as Conversion Reactor. |
| 08:51 | Now let’s insert two more material streams that exit the Conversion Reactor. |
| 08:58 | To do that, let us drag one Material Stream to the flowsheet. |
| 09:03 | Let us now arrange it. |
| 09:06 | We will leave that stream as unspecified. |
| 09:10 | Then we will change the name of this stream to Vapour Product. |
| 09:16 | Next, we will insert another Material Stream. |
| 09:20 | Let us once again arrange it. |
| 09:23 | Leave that stream as unspecified.
And name this stream as Liquid Product |
| 09:30 | Next, we will insert one Energy Stream. And name this stream as Energy. |
| 09:39 | We are now ready to specify the Conversion Reactor.
So let’s click on it. |
| 09:47 | On the left, we can see a tab displaying properties related to Conversion Reactor. |
| 09:54 | Under Connections, click on the drop-down against Inlet Stream.
And select Feed. |
| 10:02 | Next, click on the drop-down against Outlet Stream 1 and select Vapour Product. |
| 10:10 | Next, click on the drop-down against Outlet Stream 2 and select Liquid Product. |
| 10:18 | Then click on the drop-down against Energy Stream and select Energy. |
| 10:26 | Now go to the next section, Calculation Parameters. |
| 10:31 | Here, the first option is Reaction Set.
By default, it is Default Set. |
| 10:37 | Next, click on the drop-down against Calculation Mode and select Isothermic. |
| 10:45 | Now we will run the simulation. |
| 10:48 | So, from the toolbar, click on Solve Flowsheet button. |
| 10:53 | When the calculations are completed, click on the Conversion Reactor in the flowsheet. |
| 11:00 | Go to the Property Editor Window of the Conversion Reactor. |
| 11:06 | Locate Results section. |
| 11:08 | Under the Reactions tab, check Conversion.
It is 78.33 %. |
| 11:16 | This is the conversion of the base component of the reaction. |
| 11:21 | In this case, it is conversion of Carbon monoxide. |
| 11:26 | Now, go to Conversions tab.
We will look into the individual conversion of all the reactants. |
| 11:34 | Here for Carbon monoxide, the conversion is 78.33% and for Hydrogen, it is 39.16%. |
| 11:45 | Now, go to Insert menu and select Master Property Table. |
| 11:52 | Double-click on the Master Property Table. |
| 11:56 | Configure Master Property Table window opens. |
| 12:00 | Enter Name as Stream Wise Results. |
| 12:04 | Enter Object Type as Material Stream. By default, Material Stream is already selected. So we will not change it. |
| 12:14 | Under Properties to display, select Object as Feed, Vapour Product and Liquid Product. |
| 12:24 | Under Property, scroll down to see all the parameters. |
| 12:30 | Now select the properties as
Temperature , Pressure , Mass Flow |
| 12:39 | Molar Flow |
| 12:42 | Molar Fraction (Mixture) / Carbon monoxide |
| 12:46 | Molar Flow (Mixture) / Carbon monoxide |
| 12:51 | Molar Fraction (Mixture) / Hydrogen |
| 12:55 | Molar Flow (Mixture) / Hydrogen |
| 13:00 | Molar Fraction (Mixture) / Methanol |
| 13:04 | Molar Flow (Mixture) / Methanol |
| 13:08 | Let’s close this window. |
| 13:11 | Move the Master Property Table for better visibility. |
| 13:16 | Here, we can see the corresponding results for Vapour Product, Liquid Product and Feed. |
| 13:26 | The reaction is a Vapour Phase reaction. |
| 13:29 | So, we can see that Liquid Product stream shows zero flow rate and composition. |
| 13:36 | Let's summarize. |
| 13:38 | In this tutorial, we have learnt to
Define a Conversion Reaction, Simulate a Conversion Reactor, Calculate Conversion percentage from Conversion function |
| 13:51 | As an assignment,
Repeat this simulation with different compounds and different Conversion |
| 13:59 | Different Property Package, Different feed conditions |
| 14:04 | Watch the video available at following link.
It summarizes the Spoken Tutorial project. |
| 14:10 | The Spoken Tutorial Project Team, Conducts workshops and Gives certificates.
For more details, please write to us. |
| 14:19 | Please post your times queries in this forum. |
| 14:23 | The FOSSEE team coordinates conversion of existing flow sheets into DWSIM. |
| 14:29 | We give honorarium and certificates.
For more details, please visit this site. |
| 14:36 | The FOSSEE team coordinates coding of solved examples of popular books. |
| 14:42 | We give honorarium and certificates.
For more details, please visit this site. |
| 14:49 | The FOSSEE team helps migrate commercial simulator labs to DWSIM. |
| 14:55 | We give honorarium and certificates.
For more details, please visit this site. |
| 15:02 | Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India. |
| 15:11 | This tutorial is contributed by Kaushik Datta and Priyam Nayak. Thanks for joining. |
