DWSIM/C2/Continuous-Stirred-Tank-Reactor/English-timed

Time	Narration
00:01	Welcome to this tutorial on simulating a Continuous Stirred Tank Reactor (CSTR) in DWSIM.
00:07	In this tutorial, we will learn to: simulate a Continuous Stirred Tank Reactor (CSTR),
00:14	calculate Conversion and Residence Time for a reaction in a CSTR.
00:20	To record this tutorial, I am using DWSIM 4.3 and Windows 7.
00:28	The process demonstrated in this tutorial is identical in other OS also such as- Linux, Mac OS X or FOSSEE OS on ARM.
00:40	To practice this tutorial, you should know how to- add components to a flowsheet,
00:46	select thermodynamic packages,
00:49	add material and energy stream and specify their properties
00:54	and add kinetic reaction in reaction manager.
00:58	The pre-requisite 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 CSTR.
01:16	Here we give Reaction, Property Package and Inlet Stream Conditions.
01:22	Next, we give CSTR dimensions and reaction kinetics.
01:27	I have already opened DWSIM on my machine.
01:32	Go to File menu and select New Steady-state Simulation.
01:37	Simulation Configuration Wizard window appears. At the bottom, click on Next.
01:44	Now, in the Compounds Search tab, type Ethanol.
01:50	Select Ethanol from ChemSep database.
01:54	Similarly, add Acetic Acid.
01:58	Next, add Water.
02:02	Next, add Ethyl Acetate.
02:06	Click on Next.
02:08	Now comes Property Packages.
02:12	From Available Property Packages, double-click on NRTL.
02:18	Then click on Next.
02:21	We are moved to Flash Algorithm.
02:24	From Default Flash Algorithm, select Nested Loops(VLE).
02:31	Click on Next.
02:33	The next option is System of Units.
02:37	Under System of Units, we will select C5.
02:43	Then click on Finish.
02:46	Let us now maximize the simulation window.
02:50	Let’s insert a feed stream that enters the CSTR.
02:54	Go to Object Palette.
02:56	From Streams section, drag and drop a Material Stream to the Flowsheet.
03:02	Let’s change the name of this stream to Feed.
03:07	Now we will specify the Feed stream properties.
03:12	Go to Input Data.
03:15	Select Flash Spec as Temperature and Pressure (TP), if not already selected.
03:21	By default, Temperature and Pressure are already selected as Flash Spec.
03:27	Change Temperature to 70 degC and press Enter.
03:33	Change Pressure to 1 bar and press Enter.
03:38	Change Mass Flow to 3600 kg/hour and press Enter.
03:45	Now let us specify the feed stream compositions.
03:50	Under Composition, choose the Basis as Mole Fractions, if not already selected.
03:57	By default, Mole Fractions is already selected as Basis.
04:02	Now for Ethanol, enter the Amount as 0.48 and press Enter.
04:10	For Acetic Acid, enter 0.5 and press Enter.
04:16	Similarly, for Water, enter 0.02 and press Enter.
04:23	For Ethyl Acetate, enter 0 and press Enter.
04:28	On the right, click on this green tick to Accept Changes.
04:33	Next, we will define the Kinetic Reaction.
04:37	Under Tools, click on Reactions Manager.
04:42	Chemical Reactions Manager window opens.
04:46	Under Chemical Reactions tab, click on the green coloured Add Reaction button.
04:52	Then click on Kinetic.
04:55	Add New Kinetic Reaction window opens.
04:59	Under Identification, enter the Name as Ethyl Acetate.
05:05	Now enter the Description. “Irreversible reaction for synthesis of Ethyl Acetate from Ethanol and Acetic Acid.”
05:15	Next part is a table of Components, Stoichiometry and Reaction Orders.
05:21	First column Name shows the available compounds here.
05:26	Second column corresponds to its Molar Weight
05:30	Next column is Include. Under Include, check all the check boxes.
05:37	The fourth column is BC. Under BC, check the Ethanol check box as Ethanol is the base component.
05:47	Next column is Stoichiometric coefficients
05:51	Under Stoichiometric coefficients column, enter: -1 for Ethanol,
05:58	-1 for Acetic Acid,
06:01	1 for Water and 1 for Ethyl Acetate and then press Enter.
06:10	In the Stoichiometry field, we can see it is showing OK.
06:15	Here, the Equation field shows the reaction equation.
06:20	Next column is DO.
06:22	We are considering the reaction to be elementary.
06:26	So under DO column, enter: 1 for Ethanol,
06:32	1 for Acetic Acid and then press Enter.
06:38	Next column is RO.
06:41	Since we are considering an irreversible reaction, we will not enter anything here.
06:47	Then comes Kinetic Reactions Parameters.
06:51	Our rate is in terms of molar concentration.
06:55	So, we will select Basis as Molar Concentrations.
07:00	Select Fase as Liquid, if not already selected.
07:05	Enter Tmin as 300.
07:09	Enter Tmax as 2000.
07:12	Now, go to Direct and Reverse Reactions Velocity Constant.
07:17	In Direct Reaction, enter A as 0.005.
07:23	Click on OK and close Chemical Reactions Manager window.
07:29	Now, let us insert a Continuous Stirred Tank Reactor to the flowsheet.
07:35	Go to Object Palette.
07:37	Under Unit Operations, Click on the Continuous Stirred Tank Reactor.
07:43	Drag and drop it to the flowsheet.
07:46	Let us now arrange it as required.
07:50	And then, let us insert one Output Stream.
07:54	To do that, let us drag one Material Stream.
07:58	Let us once again arrange it.
08:01	Leave that stream as unspecified.
08:04	We will change the name of this stream to Product.
08:09	Next, we will insert one Energy Stream and name this stream as Energy.
08:16	We are now ready to specify the Continuous Stirred Tank Reactor. Let’s click on it.
08:23	On the left, we can see a tab displaying properties related to the CSTR.
08:29	Under Connections, click on the drop-down against Inlet Stream. And select Feed.
08:36	Next, click on the drop-down against Outlet Stream 1 and select Product.
08:43	Then click on the drop-down against Energy Stream and select Energy.
08:50	Now go to the next section, Calculation Parameters.
08:55	Here, the first option is Reaction Set. By default, it is Default Set.
09:02	Next, click on the drop-down against Calculation Mode and select Isothermic.
09:09	Then click on the field against Reactor Volume and enter 0.14 Then press Enter.
09:18	Now we will run the simulation.
09:21	So, from the toolbar, click on Solve Flowsheet button.
09:26	When the calculations are completed, click on the Continuous Stirred Tank Reactor in the flowsheet.
09:33	From the Property Editor Window of CSTR, locate Results section.
09:39	Under the General tab, click Residence time. It is 0.033 hour.
09:46	Now go to Conversions tab.
09:49	Here for Ethanol, the conversion is 99.5% and for Acetic Acid, it is 95.5%.
10:00	Now, go to Insert menu and select Master Property Table.
10:06	Double-click on the Master Property Table.
10:10	Configure Master Property Table window opens.
10:14	Enter Name as Results – Continuous Stirred Tank Reactor.
10:19	Enter Object Type as Material Stream.
10:22	By default, Material Stream is already selected. So, we will not change it.
10:29	Under Properties to display, select Object as Product and Feed.
10:35	Under Property, scroll down to see all the parameters.
10:40	Now select the properties as Temperature, Pressure, Mass Flow, Molar Flow,
10:48	Liquid Phase (Mixture) Volumetric Fraction,
10:53	Molar Flow (Mixture) / Ethanol,
10:56	Mass Flow (Mixture) / Ethanol,
10:59	Molar Flow (Mixture) / Acetic Acid,
11:01	Mass Flow (Mixture) / Acetic Acid,
11:06	Molar Flow (Mixture) / Water,
11:09	Mass Flow (Mixture) / Water,
11:12	Molar Flow (Mixture) / Ethyl Acetate,
11:16	Mass Flow (Mixture) / Ethyl Acetate,
11:19	Close this window.
11:21	Move the Master Property Table for better visibility.
11:25	Here we can see the corresponding results for Product and Feed.
11:31	Let's summarize.
11:33	In this tutorial, we have learnt to: simulate a Continuous Stirred Tank Reactor,
11:38	calculate Conversion and Residence time for a reaction in a CSTR.
11:44	As an assignment, repeat the simulation with different compounds and thermodynamics,
11:50	different feed conditions,
11:53	different CSTR dimensions and reaction kinetics.
11:58	Watch the video available at the following link.
12:01	It summarizes the Spoken Tutorial project.
12:05	The Spoken Tutorial Project Team conducts workshops and gives certificates. For more details, please write to us.
12:14	Please post your times queries in this forum.
12:18	The FOSSEE team coordinates conversion of existing flow sheets into DWSIM.
12:24	We give honorarium and certificates for those who do this. For more details, please visit this site.
12:33	The FOSSEE team coordinates coding of solved examples of popular books.
12:38	We give honorarium and certificates for those who do this. For more details, please visit this site.
12:47	The FOSSEE team helps migrate commercial simulator labs to DWSIM.
12:52	We give honorarium and certificates for those who do this. For more details, please visit this site.
13:01	Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD Government of India.
13:09	This tutorial is contributed by Kaushik Datta and Priyam Nayak. Thanks for joining.

Contributors and Content Editors

PoojaMoolya, Sandhya.np14