Sandhya.np14 at 10:44, 17 May 2018

2018-05-17T10:44:36Z

Udayana at 14:26, 6 April 2018

2018-04-06T14:26:33Z

PoojaMoolya: Created page with "{| border=1 ||'''Time''' ||'''Narration''' |- || 00:01 || Welcome to this spoken tutorial on Simulating a '''Plug Flow Reactor(PFR)''' in '''DWSIM'''. |- | 00:07 || In this..."

2017-08-16T13:16:06Z

Created page with "{| border=1 ||'''Time''' ||'''Narration''' |- || 00:01 || Welcome to this spoken tutorial on Simulating a '''Plug Flow Reactor(PFR)''' in '''DWSIM'''. |- | 00:07 || In this..."

New page

{| border=1
||'''Time'''
||'''Narration'''

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|| 00:01
|| Welcome to this spoken tutorial on Simulating a '''Plug Flow Reactor(PFR)''' in '''DWSIM'''.

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| 00:07
|| In this tutorial, we will learn to: Define a '''kinetic reaction'''

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|| 00:13
|| Simulate a '''Plug Flow Reactor (PFR)'''

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|| 00:16
|| Calculate '''Conversion''' and '''Residence time''' for a '''reaction''' in a '''PFR'''.

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|| 00:22
|| To record this tutorial, I am using '''DWSIM 4.3''' and '''Windows 7'''

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|| 00:30
||The process demonstrated in this tutorial is identical in other OS also, such as- '''Linux''', '''Mac OS X''' or '''FOSSEE OS''' on '''ARM'''.

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||00:42
|| To practice this tutorial, you should know : how to add components to a '''flowsheet'''

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|| 00:49
|| How to select '''thermodynamic''' packages

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|| 00:53
|| How to add '''material''' and '''energy''' streams and specify their properties.

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|| 00:59
|| The prerequisite tutorials are mentioned on our website

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|| 01:04
|| You can access these tutorials and all the associated files from this site.

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|| 01:10
|| We will develop a '''flowsheet '''to determine the '''exit composition''' from an Isothermal '''PFR.'''

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|| 01:16
|| Here we give '''reaction, property package''' and '''inlet stream conditions'''.

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||01:22
|| Next, we give '''Reactor Parameters''' and '''reaction kinetics'''.

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|| 01:28
|| I have already opened '''DWSIM '''on my machine.

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|| 01:33
|| Go to '''File''' menu and select '''New Steady-state Simulation.'''

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|| 01:38
|| '''Simulation Configuration Wizard''' window appears.

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|| 01:42
|| At the bottom, click on '''Next.'''

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|| 01:45
|| First, we will add the '''compounds.'''

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|| 01:48
|| In the '''Compounds Search''' tab, type '''Nitrogen.'''

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|| 01:52
|| Select '''Nitrogen '''from '''ChemSep '''database.

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|| 01:56
|| Similarly, add '''Hydrogen''' from '''ChemSep '''database.

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|| 02:01
|| Next, add '''Ammonia''' from '''ChemSep '''database. Now, all the '''compounds''' are added.

Click on '''Next.'''

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|| 02:11
|| Now comes '''Property Packages.'''

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|| 02:14
|| From '''Available Property Packages''', double-click on '''Peng-Robinson (PR).'''

Then click on '''Next.'''

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|| 02:21
|| We are moved to '''Flash Algorithm'''.

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|| 02:24
|| From '''Default Flash Algorithm '''select '''Nested Loops(VLE)'''. Click on '''Next.'''

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|| 02:31
|| Next option is '''System of Units.'''

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|| 02:35
||Under '''System of Units''' select '''C5'''.

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|| 02:39
||It has the desired system of units according to our problem statement.

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|| 02:44
||Then click on '''Finish.'''

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|| 02:47
|| Let us maximize the simulation window.

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|| 02:50
|| Now let’s insert a '''feed stream '''that enters the '''PFR'''.

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|| 02:55
||On the right hand side of main simulation window, go to '''Object Palette'''.

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|| 03:00
||From '''Streams''' section, drag and drop a '''Material Stream''' to the '''Flowsheet'''.

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|| 03:05
|| Click on '''Material Stream''' “'''MSTR-000”''' to view its properties.

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|| 03:11
|| Let’s change the name of this '''stream '''to '''Feed.'''

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|| 03:15
|| Now we will specify the '''Feed stream '''properties.

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|| 03:18
||Under '''Input Data''', select '''Flash Spec''' as '''Temperature and Pressure (TP), '''if not already selected.

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|| 03:26
||By default, '''Temperature and Pressure '''are already selected as '''Flash Spec.'''
So let’s not change it.

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|| 03:33
|| Change '''Temperature''' to '''425 degC''' and press '''Enter '''to accept the new value.

|-
||03:41
|| Change '''Pressure''' to '''200''' '''bar''' and press '''Enter'''.

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|| 03:46
|| Change '''Mass Flow''' to '''3600 kg/h''' and press '''Enter'''.

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|| 03:52
|| Now let us specify the '''feed stream compositions'''.

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|| 03:57
|| Under '''Composition''', choose the '''Basis''' as '''Mole Fractions, '''if not already selected'''.'''

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|| 04:05
||By default, '''Mole Fractions''' is already selected as '''Basis.''' So, let’s not change it.

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|| 04:11
|| Now for '''Nitrogen''',''' '''enter the '''Amount''' as '''0.5 '''and press '''Enter.'''

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|| 04:18
||Similarly, for '''Hydrogen, '''enter it as '''0.5 '''and press '''Enter.'''

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|| 04:25
||For '''Ammonia, '''enter''' 0 '''and press '''Enter'''.

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|| 04:30
|| On the right, click on this green tick to '''Accept Changes.'''

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|| 04:34
|| Now we will define the '''Kinetic Reaction.'''

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|| 04:38
|| Under '''Tools''', click on '''Reactions Manager.'''

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|| 04:42
||'''Chemical Reactions Manager '''window opens.

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|| 04:46
|| Under '''Chemical Reactions''' tab, click on the green coloured '''Add''' '''Reaction''' button.

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||04:52
|| Then click on '''Kinetic.'''

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|| 04:55
|| '''Add New Kinetic Reactions''' window opens.

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||04:59
|| First part is '''Identification'''. Under '''Identification,''' enter the '''Name''' as '''Ammonia Synthesis.'''

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||05:08
|| Next, enter the '''Description.'''

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|| 05:11
||“'''Irreversible reaction for synthesis of Ammonia from Nitrogen and Hydrogen'''”

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|| 05:17
|| Next part is a table of '''Components, Stoichiometry '''and '''Reaction Orders.'''

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|| 05:23
|| First column '''Name,''' shows the available components here.

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|| 05:28
|| Second column corresponds to its '''Molar Weight.'''

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|| 05:32
|| Next column is '''Include.''' It indicates the components which will take part in the reaction.

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|| 05:39
||Under '''Include''', check all the check boxes against all the '''components’ '''names.

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|| 05:44
|| Fourth column is '''BC.''' It indicates the '''base component '''of the''' reaction.'''

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|| 05:51
||Under '''BC''', check the '''Nitrogen''' check box as '''Nitrogen''' is the '''base component.'''

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|| 05:57
|| Next column is '''Stoich. Coeff. (stoichiometric coefficients)'''

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|| 06:01
||Under '''Stoic Coeff''' column, enter:

'''-1''' for '''Nitrogen''',

'''-3''' for '''Hydrogen''',

and for '''Ammonia 2'''

Then press '''Enter.'''

|-
|| 06:15
||'''Negative sign '''is to indicate the '''components '''as '''Reactants'''.

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|| 06:20
|| In the '''Stoichiometry '''field, we can see it is showing '''OK'''.

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|| 06:25
||So the reaction is balanced after entering the '''stoichiometric''' '''coefficients'''.

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|| 06:31
|| Here''' '''the '''Equation '''field shows the '''reaction equation.'''

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|| 06:36
|| Next column is '''DO,''' which indicates '''direct/forward''' reaction order.

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|| 06:43
||We are considering the '''reaction''' to be '''First order''' with respect to '''Nitrogen'''.

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|| 06:49
||So we will enter '''1''' in the '''DO''' column against '''Nitrogen.''' And then press '''Enter.'''

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||06:57
|| Next column is '''RO''' which indicates '''reverse reaction order'''.

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|| 07:03
||Since we are considering an '''irreversible reaction''', we will not enter anything here.

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|| 07:09
|| Then comes '''Kinetic Reactions Parameters.'''

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|| 07:13
|| Our rate is in terms of '''molar concentration'''.

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|| 07:17
||So, we will select '''Basis''' as '''Molar Concentrations.'''

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||07:21
|| Select '''Fase''' as '''Vapor.'''

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|| 07:25
|| Next is '''Tmin''' and '''Tmax'''.

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|| 07:29
||It gives temperature range within which rate expression is assumed to be valid.

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|| 07:35
|| So, enter '''Tmin (K) '''as''' 500 '''and''' Tmax (K) '''as''' 2000.'''

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|| 07:41
|| Now go to '''Direct and''' '''Reverse Reactions Velocity Constant.'''

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|| 07:46
||In '''Direct Reaction''', enter '''A''' as '''0.004'''

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||07:51
|| Click '''OK '''and close the '''Chemical Reactions Manager''' window.

|-
||07:57
|| Now let us insert a '''Plug-Flow Reactor (PFR)''' into the '''flowsheet'''.

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|| 08:02
||Go to Object Palette.

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|| 08:04
||Under '''Unit Operations''', click on '''Plug-Flow Reactor (PFR)'''. Click on it and drag it to the '''flowsheet. '''

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|| 08:11
||Let us now arrange it as required.

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||08:14
|| We will insert one '''Output Stream'''. To do so, drag one '''Material Stream.'''

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|| 08:20
||Let us once again arrange it. As this is an '''output stream''', we will leave it unspecified.

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|| 08:27
|| We will change the name of this '''stream '''to '''Product.'''

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|| 08:31
|| Next, we will insert one '''Energy Stream.''' And name this '''stream '''as '''Energy.'''

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||08:38
|| We are now ready to specify the '''Plug-Flow Reactor.''' Click on it.

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|| 08:44
||On the left, we can see a '''tab '''displaying properties related to the '''PFR.'''

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|| 08:50
||This tab is called '''Property Editor Window.'''

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|| 08:54
|| Under '''Connections, '''click on the drop-down against '''Inlet Stream.''' and select '''Feed.'''

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||09:01
|| Next, click on the drop-down against '''Outlet Stream '''and select '''Product.'''

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||09:07
|| Then click on the drop-down against '''Energy Stream '''and select '''Energy.'''

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|| 09:13
|| Now go to the next section, '''Calculation Parameters.'''

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||09:18
|| Here, the first option is '''Reaction Set.''' By default, it is '''Default Set'''.

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|| 09:26
||Since we have only one '''reaction''', we leave it as it is.

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|| 09:31
|| Next, click on the drop-down against''' Calculation Mode.''' Select '''Isothermic.'''

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|| 09:38
|| Then click on the field against '''Reactor Volume''' and enter '''1 meter cube'''
Then press '''Enter.'''

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|| 09:47
|| Click on the field against '''Reactor length''' and enter it as '''1.5 m.'''

Then press '''Enter.'''

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|| 09:56
|| Now we will run the '''simulation.'''

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|| 09:59
|| So, from the toolbar click on '''Solve Flowsheet''' button.

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|| 10:04
|| When the calculations are completed, click on '''PFR''' in the Flowsheet.

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|| 10:09
|| From the '''Property Editor Window''' of '''PFR''' locate '''Results''' section.

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|| 10:15
|| Under '''General''' tab, check '''Residence time.''' It is '''0.013 hour.'''

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|| 10:23
|| Under '''Conversions''' tab, check conversion for both the '''reacting compounds.'''

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|| 10:29
||For '''Nitrogen,''' the conversion is '''17.91%''' and for '''Hydrogen,''' it is '''53.73%.'''

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|| 10:40
|| Now we will check the material balances.

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|| 10:44
||Go to '''Insert''' menu and select '''Master Property Table'''.

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|| 10:49
|| Double click on the '''Master Property Table '''to edit it.

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|| 10:53
||'''Configure Master Property Table''' window opens.

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|| 10:57
|| Enter''' Name''' as '''Results - Plug Flow Reactor'''

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||11:01
|| Enter '''Object Type''' as '''Material Stream'''.

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|| 11:05
||By default, '''Material Stream''' is already selected. So we will not change it.

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|| 11:11
|| Under '''Properties to display''', select '''Object '''as '''Feed''' and '''Product.'''

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||11:17
|| Under '''Property''', scroll down to see all the parameters.

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|| 11:22
||Now select the properties as:

'''Temperature'''

'''Pressure'''

'''Mass Flow'''

'''Molar Flow'''

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|| 11:32
||'''Vapor Phase Volumetric Fraction'''

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|| 11:36
||'''Molar Flow (Mixture) / Nitrogen'''

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|| 11:39
||'''Mass Flow (Mixture) / Nitrogen'''

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|| 11:42
||'''Molar Flow (Mixture) / Hydrogen'''

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|| 11:45
||'''Mass Flow (Mixture) / Hydrogen'''

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|| 11:48
||'''Molar Flow (Mixture) / Ammonia'''

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|| 11:51
||'''Mass Flow (Mixture) / Ammonia'''

|-
|| 11:54
|| Close this window.

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|| 11:56
||Move the '''Master Property Table '''for better visibility.

|-
|| 12:01
||Here we can see the corresponding results for '''Product''' and''' Feed.'''

|-
|| 12:06
|| Let us summarize.

|-
||12:08
|| In this tutorial, we have learnt to Define a '''kinetic reaction'''

|-
|| 12:14
||Simulate a '''Plug-Flow Reactor (PFR)'''

|-
|| 12:17
|| Calculate '''Conversion''' and '''Residence time''' for a '''reaction''' in a '''PFR'''

|-
|| 12:23
|| As an assignment, Repeat this simulation with different '''compounds''' and '''thermodynamics'''.

|-
|| 12:29
||Different '''feed conditions '''

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|| 13:31
||Different '''PFR dimensions''' and '''reaction kinetics '''

|-
|| 12:36
|| Watch the video available at following link.

'''http://spoken-tutorial.org/ '''

|-
|| 12:38
||It summarizes the Spoken Tutorial project.

|-
||12:42
|| The Spoken Tutorial Project Team, Conducts workshops Gives certificates

|-
|| 12:48
|| For more details, please write to contact@spoken-tutorial.org

|-
||12:51
|| Please post your times queries in this forum.

|-
|| 12:55
|| The '''FOSSEE''' team coordinates coding of solved examples of popular books.

|-
|| 13:00
||We give honorarium and certificates for those who do this.

|-
|| 13:05
||For more details, please visit this site.

|-
|| 13:09
|| The '''FOSSEE''' team helps migrate commercial simulator labs to '''DWSIM.'''

|-
|| 13:14
||We give honorarium and certificates for those who do this.

|-
|| 13:19
||For more details, please visit this site

|-
|| 13:23
|| The '''FOSSEE''' team coordinates conversion of existing flow sheets into '''DWSIM'''.

|-
|| 13:29
||We give honorarium and certificates for those who do this. For more details, please visit this site.

|-
||13:37
|| '''Spoken Tutorial''' and '''FOSSEE''' projects are funded by '''NMEICT, MHRD''', Government of India.

|-
||13:45
|| This tutorial is contributed by Kaushik Datta and Priyam Nayak.

Thanks for joining.

|}

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-||Go to Object Palette.
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+|| 12:31
 ||Different '''PFR dimensions''' and '''reaction kinetics '''

DWSIM/C2/Plug-Flow-Reactor/English-timed - Revision history

Sandhya.np14 at 10:44, 17 May 2018

Udayana at 14:26, 6 April 2018

PoojaMoolya: Created page with "{| border=1 ||'''Time''' ||'''Narration''' |- || 00:01 || Welcome to this spoken tutorial on Simulating a '''Plug Flow Reactor(PFR)''' in '''DWSIM'''. |- | 00:07 || In this..."