| Slide Number 1
|Welcome to this spoken tutorial on Simulating a Plug Flow Reactor(PFR) 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
Prerequisite Tutorials and Files
| The prerequisite tutorials are mentioned on our website, spoken-tutorial.org
| Slide Number 5
N2 + 3 H2 ⇌ 2 NH3
Mole Fraction(N2): 0.5
Mole Fraction(H2): 0.5
Temperature: 425 degree C
Pressure: 200 bar
| We will develop a flowsheet to determine the exit composition from an Isothermal PFR.
| Slide Number 6
Volume: 1 m3, length: 1.5 m
r A = KCan
K = 0.004, n = 1
|Next, we give PFR dimensions and reaction kinetics.|
| File >> New Steady-state Simulation
|| I have already opened DWSIM on my machine.
| Type Nitrogen in the Search tab
| First, we will add the compounds.
| Point to Property Packages
|| Now comes Property Packages.
| Point to Flash Algorithm
|| We are moved to Flash Algorithm.
| Point to System of Units
|| Next option is System of Units.
|Let us maximize the simulation window.|
| Point to Object Palette
Click and drag Material Stream to the flowsheet
| Now let’s insert a feed stream that enters the PFR.
|Click on MSTR-000||Click on Material Stream “MSTR-000” to view its properties.|
|Type Feed||Let’s change the name of this stream to Feed.|
|Input Data>> Flash Spec>> Temperature and Pressure(TP)|| Now we will specify the Feed stream properties.
| Input Data >> Temperature >> 425 C
|Change Temperature to 425 degC and press Enter to accept the new value.|
| Input Data >> Pressure >> 200 bar
|Change Pressure to 200 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.
| Nitrogen: 0.5
|| Now for Nitrogen, enter the Amount as 0.5 and press Enter.
|Click Accept Changes||On the right, click on this green tick to Accept Changes.|
|Now we will define the Kinetic Reaction.|
| Tools >> Reactions 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 Reactions||Add New Kinetic Reactions window opens.|
|Identification >> Name >> Ammonia Synthesis|| First part is Identification.
|Description >> Irreversible reaction for synthesis of Ammonia from Nitrogen and Hydrogen|| Next, 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 components here.|
|Point to Molar Weight||Second column corresponds to its Molar Weight.|
|Point to Include|| Next column is Include.
| Point to BC
|| Fourth column is BC.
| Point to Stoich. Coeff
|| Next column is Stoich. Coeff. (stoichiometric coefficients)
-3 for Hydrogen,
and 2 for Ammonia.
Then press Enter.
|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, which indicates direct/forward reaction order.
|Point to RO|| Next column is RO which indicates reverse reaction order.
|Point to Kinetic Reactions Parameters||Then comes Kinetic Reactions Parameters.|
|Basis >> Molar Concentrations|| Our rate is in terms of molar concentration.
|Fase >> Vapor||Select Fase as Vapor.|
| Point to Tmin and Tmax
|| Next is Tmin and Tmax.
| Tmin (K) >> 700
||So, enter Tmin (K) as 500 and Tmax (K) as 2000.|
| Point to Direct and Reverse Reactions Velocity Constant
|| Now go to Direct and Reverse Reactions Velocity Constant.
| Click OK
||Click OK and close the Chemical Reactions Manager window.|
| Go to Object Palette>>Unit Operations
|| Now let us insert a Plug-Flow Reactor (PFR) into the flowsheet.
|Click and drag Material Stream to the flowsheet|| We will insert one Output Stream.
|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 Plug-Flow Reactor (PFR)|| We are now ready to specify the Plug-Flow Reactor.
| Go to Connections
Click on drop down arrow against Inlet Stream
| Under Connections, click on the drop-down against Inlet Stream.
|Click on drop down arrow against Outlet Stream
||Next, click on the drop-down against Outlet Stream 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.
| Reactor Volume >> 1 m3
|| Then click on the field against Reactor Volume and enter 1 m3.
| Reactor Length >> 1.5 m
|| Click on the field against Reactor length and enter it as 1.5 m.
|Now we will run the simulation.|
|Click Solve Flowsheet||So, from the toolbar click on Solve Flowsheet button.|
|Click Plug-Flow Reactor||When the calculations are completed, click on PFR in the Flowsheet.|
|Hover mouse at Results||From the Property Editor Window of PFR locate Results section.|
|Results >> General|| Under General tab, check Residence time.
|Results >> Conversions|| Under Conversions tab, check conversion for both the reacting compounds.
|Insert >> Master Property Table|| Now we will check the material balances.
| Double click on Master Property Table
|| Double click on the Master Property Table to edit it.
|Type Results - Plug Flow Reactor||Enter Name as Results - Plug Flow Reactor|
|Type Material Stream|| Enter Object Type as Material Stream.
By default, Material Stream is already selected.
|Object >> Feed and Product||Under Properties to display, select Object as Feed and Product.|
|Configure Master Property Table>> Property|| Under Property, scroll down to see all the parameters.
Vapor Phase Volumetric Fraction
Mass Flow (Mixture) / Nitrogen
Molar Flow (Mixture) / Nitrogen
Mass Flow (Mixture) / Hydrogen
Molar Flow (Mixture) / Hydrogen
Mass Flow (Mixture) / Ammonia
Molar Flow (Mixture) / Ammonia
| Close this window.
|Let us summarize.|
| Slide Number 7
| In this tutorial, we have learnt to
| Slide Number 8
Ethylene oxide, Water & Ethylene glycol
Mole Fraction(C2H4O): 0.2
Mole Fraction(H2O): 0.8
Temperature: 55 degree C
Pressure: 1 bar
Volume: 1 m3, Length: 1.2 m
r A = KCan, K = 0.005 1/s, n = 1
| As an assignment,
| 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
| 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
TextBook Companion Project
| The FOSSEE team coordinates coding of solved examples of popular books.
| Slide Number 13
Lab Migration Project
| The FOSSEE team helps migrate commercial simulator labs to DWSIM.
| Slide Number 14
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 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.