| Slide Number 1
|Welcome to this tutorial on simulating a Continuous Stirred Tank Reactor (CSTR) in DWSIM.|
| Slide Number 2
| In this tutorial, we will learn to:
| Slide Number 3
| To record this tutorial, I am using
The process demonstrated in this tutorial is identical in other OS also such as-
| Slide Number 4
|| To practice this tutorial, you should know how to-
| Slide Number 5
Prerequisite Tutorials and Files
| The pre-requisite 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(C2H5OH): 0.48
Mole Fraction(CH3COOH): 0.5
Mole Fraction(H2O): 0.02
Temperature: 70 degree C
Pressure: 1 bar
| We will develop a flowsheet to determine the exit composition from an isothermal CSTR.
| Slide Number 6
Volume: 1 m3,
|Next, we give CSTR dimensions and reaction kinetics.|
| File >> New Steady-state Simulation
|| I have already opened DWSIM on my machine.
| Type Ethanol in the Search tab
|| Now, in the Compounds Search tab, type Ethanol.
|Type Acetic Acid in the Search tab||Similarly, add Acetic Acid.|
|Type Water in the Search tab||Next, add Water.|
|Type Ethyl Acetate in the Search tab||Next, add Ethyl Acetate.|
|Click on Next.||Click on Next.|
|Point to Property Packages||Now comes Property Packages.|
| Property Packages >> Available Property Package
||From Available Property Packages, double-click on NRTL.|
|Click on Next.||Then click on Next.|
|Point to Flash Algorithm||We are moved to Flash Algorithm.|
|Default Flash Algorithm >> Nested Loops (VLE)||From Default Flash Algorithm select Nested Loops(VLE)|
|Click Next||Click on Next.|
|Point to System of Units||The next option is System of Units.|
|System of Units >> C5||Under System of Units, we will select C5.|
|Click on Finish||Then click on Finish.|
|Maximize the simulation window||Let us now maximize the simulation window.|
|Now let’s insert a feed stream that enters the CSTR.|
|Go to Object Palette||Go to Object Palette.|
| Go to Streams Section
||From Streams section, drag and drop a Material Stream to the Flowsheet.|
|Type Feed||Let’s change the name of this stream to Feed.|
|Now we will specify the Feed stream properties.|
|Input Data >> Flash Spec >> Temperature and Pressure (TP)|| Go to Input Data.
| Input Data >> Temperature >> 70 C
|Change Temperature to 70 degC and press Enter.|
| Input Data >> Pressure >> 1 bar
|Change Pressure to 1 bar and press Enter.|
| Input Data >> Mass Flow >> 3600 kg/h
|Change Mass Flow to 3600 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.
|Ethanol: 0.48||Now for Ethanol, enter the Amount as 0.48 and press Enter.|
|Acetic Acid: 0.5||For Acetic Acid, enter 0.5 and press Enter.|
|Water: 0.02||Similarly, for Water, enter 0.02 and press Enter.|
|Ethyl Acetate: 0||For Ethyl Acetate, enter 0 and press Enter.|
|Click Accept Changes||On the right, click on this green tick to Accept Changes|
|Next, we will define the Kinetic Reaction.|
| Tools >> Reaction Manager
|| Under Tools, click on Reactions Manager.
|Chemical Reactions >> Add Reaction||Under Chemical Reactions tab, click on the green coloured Add Reaction button.|
|Click on Kinetic||Then click on Kinetic.|
|Point to Add New Kinetic Reaction||Add New Kinetic Reaction window opens.|
|Identification >> Name >> Ethyl Acetate||Under Identification, enter the Name as Ethyl Acetate.|
|Description >> Irreversible reaction for synthesis of Ethyl Acetate from Ethanol and Acetic Acid|| Now enter the Description.
|Point to Components, Stoichiometry and Reaction Orders||Next part is a table of Components, Stoichiometry and Reaction Orders.|
|Point to Name field||First column Name shows the available compounds here.|
|Point to Molar Weight||Second column corresponds to its Molar Weight|
|Point to Include|| Next column is Include.
| Point to BC
|| The fourth column is BC.
|Point to Stoich. Coeff||Next column is Stoich. Coeff. (stoichiometric coefficients)|
|Stoich. Coeff >> Ethanol: -1, Acetic Acid: -1, Water: 1, Ethyl Acetate: 1|| Under Stoic Coeff column, enter:
-1 for Acetic Acid
1 for Water.
and 1 for Ethyl Acetate
|Point to Stoichiometry field||In the Stoichiometry field, we can see it is showing OK.|
|Point to Equation field||Here the Equation field shows the reaction equation.|
|Point to DO||Next column is DO.|
| DO >> Ethanol: 1
Acetic Acid : 1
| We are considering the reaction to be elementary.
1 for Ethanol
1 for Acetic Acid.
|Point to RO|| Next column is RO.
|Point to Kinetic Reactions Parameters||Then comes Kinetic Reactions Parameters.|
|Basis >> Molar Concentrations|| Our rate is in terms of molar concentration.
|Fase >> Liquid||Select Fase as Liquid, if not already selected.|
| Tmin (K) >> 300
||Enter Tmin(K) as 300, Tmax(K) as 2000.|
| Point to Direct and Reverse Reactions Velocity Constant
|| Now go to Direct and Reverse Reactions Velocity Constant.
| Click on OK
||Click on OK and close Chemical Reactions Manager window.|
|Now let us insert a Continuous Stirred Tank Reactor to the flowsheet.|
| Go to Object Palette>>Unit Operations
|| Go to Object Palette.
|Let us now arrange it as required.|
|And then let us insert one Output Stream.|
|Click and drag Material Stream to the flowsheet||To do that let us drag one Material Stream.|
|Let us once again arrange it.|
|Leave that stream as unspecified.|
|Type Product||We will change the name of this stream to Product.|
|Click and drag Energy Stream to the flowsheet||Next, we will insert one Energy Stream.|
|Type Energy.||And name this stream as Energy.|
|Click Continuous Stirred Tank Reactor|| We are now ready to specify the Continuous Stirred Tank Reactor.
|On the left, we can see a tab displaying properties related to the CSTR.|
| Go to Connections
|| Under Connections, click on the drop-down against Inlet Stream.
| Click on drop down arrow against Outlet Stream 1
||Next, click on the drop-down against Outlet Stream 1 and select Product.|
| Click on the drop down against Energy Stream
||Then click on the drop-down against Energy Stream and select Energy.|
|Hover mouse at Calculation Parameters||Now go to the next section, Calculation Parameters.|
|Reaction Set >> Default Set|| Here, the first option is Reaction Set.
| Click drop down against Calculation Mode
||Next, click on the drop-down against Calculation Mode and select Isothermic.|
| Specify Reactor Volume >> 0.14 m3
|| Then click on the field against Reactor Volume and enter 0.14 m3
|Now we will run the simulation.|
|Click Solve Flowsheet||So, from the toolbar, click on Solve Flowsheet button.|
|Click Continuous Stirred Tank Reactor||When the calculations are completed, click on the Continuous Stirred Tank Reactor in the flowsheet.|
|Hover mouse at Results||From the Property Editor Window of CSTR, locate Results section.|
|Results >> General|| Under the General tab, click Residence time.
|Results >> Conversions|| Now go to Conversions tab.
|Insert >> Master Property Table||Now, go to Insert menu and select Master Property Table.|
|Double click on Master Property Table||Double-click on the Master Property Table.|
|Point to Configure Master Property Table||Configure Master Property Table window opens.|
|Type Results - Continuous Stirred Tank Reactor||Enter Name as Results – Continuous Stirred Tank Reactor.|
|Type Material Stream|| Enter Object Type as Material Stream.
|Object >> Feed and Product||Under Properties to display, select Object as Product and Feed.|
|Configure Master Property Table>> Property|| Under Property, scroll down to see all the parameters.
Liquid Phase (Mixture) Volumetric Fraction
Molar Flow (Mixture) / Ethanol
Mass Flow (Mixture) / Ethanol
Molar Flow (Mixture) / Acetic Acid
Mass Flow (Mixture) / Acetic Acid
Molar Flow (Mixture) / Water
Mass Flow (Mixture) / Water
Molar Flow (Mixture) / Ethyl Acetate
Mass Flow (Mixture) / Ethyl Acetate
|Close this window.||Close this window.|
| Move the Master Property Table for better visibility.
| Slide Number 7
|| In this tutorial, we have learnt to
| Slide Number 8
Methyl Acetate, 1-Butanol, Methanol, N-Butyl Acetate
Mole Fraction(CH3OH): 0.1
Mole Fraction(C4H9OH): 0.45
Mole Fraction(CH3COOCH3): 0.45
Temperature: 75 degree C
Pressure: 5 bar
Volume: 4 m3
| As an assignment,
| Slide Number 9
About the Spoken Tutorial Project
| Watch the video available at the following link.
It summarizes the Spoken Tutorial project.
| Slide Number 10
Spoken Tutorial Workshops
| The Spoken Tutorial Project Team
Conducts workshops and
For more details, please write to us.
| 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.
| Slide Number 12
DWSIM Flowsheeting Project
| The FOSSEE team coordinates conversion of existing flow sheets into DWSIM
We give honorarium and certificates for those who do this.
For more details, please visit this site.
| Slide Number 13
TextBook Companion Project
| The FOSSEE team coordinates coding of solved examples of popular books.
| Slide Number 14
Lab Migration Project
| The FOSSEE team helps migrate commercial simulator labs to DWSIM.
| Slide Number 15
|Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India.|
| Slide Number 16
| This tutorial is contributed by Kaushik Datta and Priyam Nayak.