source: trunk/sample/reactors/sample_pfr.mso @ 984

Last change on this file since 984 was 814, checked in by Rafael de Pelegrini Soares, 13 years ago

Fixed PFR model and sample

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File size: 2.5 KB
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1#*-------------------------------------------------------------------
2* EMSO Model Library (EML) Copyright (C) 2004 - 2007 ALSOC.
3*
4* This LIBRARY is free software; you can distribute it and/or modify
5* it under the therms of the ALSOC FREE LICENSE as available at
6* http://www.enq.ufrgs.br/alsoc.
7*
8* EMSO Copyright (C) 2004 - 2007 ALSOC, original code
9* from http://www.rps.eng.br Copyright (C) 2002-2004.
10* All rights reserved.
11*
12* EMSO is distributed under the therms of the ALSOC LICENSE as
13* available at http://www.enq.ufrgs.br/alsoc.
14*
15*--------------------------------------------------------------------
16* Sample file for model pfr
17*
18*
19* Adiabatic Production of Acetic Anhydride with a PFR
20*
21* Based on Example 8-6 of Elements of Chemical Reaction Engineering
22* Second Edition H. Scott Fogler
23*
24*
25*--------------------------------------------------------------------
26*
27* This sample file needs VRTherm (www.vrtech.com.br) to run.
28*
29*----------------------------------------------------------------------
30* Author: Rafael de P. Soares
31*         Paula B. Staudt
32* $Id: sample_pfr.mso 814 2009-08-05 19:02:18Z rafael $
33*--------------------------------------------------------------------*#
34
35using "reactors/pfr";
36
37FlowSheet PFR_AceticAnhydride
38       
39PARAMETERS
40
41        PP as Plugin (Brief="Physical Properties",
42                Type = "PP",
43                Components = ["acetone", "ketene", "methane" ],
44                LiquidModel = "PR",
45                VapourModel = "PR"
46        );
47        NComp   as Integer;
48SET
49        NComp = PP.NumberOfComponents;
50
51DEVICES
52        s1      as source;
53        Reac    as pfr;
54
55CONNECTIONS
56        s1.Outlet  to  Reac.Inlet;
57       
58SET
59        Reac.NDisc      = 15;
60        Reac.L          = 2.28 * 'm';
61        # Area was chosen to match the original example data
62        Reac.Across = 1.27*'m^3'/Reac.L;
63
64        # Only one reaction
65        Reac.NReac      = 1;
66        # Reaction 1: acetone -> ketene + methane
67        Reac.stoic(:,1) = [-1, 1, 1];
68
69SPECIFY
70        # Feed specification
71        s1.Fw = 8000 * 'kg/h';
72        s1.T = 1035 * 'K';
73        s1.P = 1.6  * 'atm';
74        s1.Composition = [0.98, 0.01, 0.01];
75
76        # Adiabatic
77        Reac.q     = 0     * 'J/s';
78       
79EQUATIONS
80
81for z in [1:Reac.NDisc] do
82       
83"Reaction Rate = k*C(1)"
84        Reac.r(1,z)  = exp(34.34 - (34222 * 'K') / Reac.str(z).T)*'1/s' * Reac.C(1,z);
85
86"Heat of reaction"
87        Reac.Hr(1,z) = -80.77 * 'kJ/mol';
88
89"Pressure Drop (no pressure drop)"
90        Reac.str(z+1).P = Reac.str(z).P;
91
92end
93
94INITIAL
95
96for z in [2:Reac.NDisc+1] do
97        Reac.str(z).T = Reac.Inlet.T;
98        Reac.str(z).z(1:NComp) = Reac.Inlet.z(1:NComp);
99end
100       
101OPTIONS
102        Dynamic         = true;
103        TimeStep        = 0.05;
104        TimeEnd         = 10;
105        #GuessFile = "PFR_AceticAnhydride";
106        #Dynamic = false; # Requires a GuessFile from a dynamic simulation
107end
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