BT1.SEP

This file was created on 23 Jun'03 0:42 by ChemSep v4.50
( C:\CHEMSEP\BT1.SEP)


INDEX: Input Iteration history Tables Graphs


Input

 Column C:\CHEMSEP\BT1.SEP

 Components:
  Benzene
  Toluene

 Operation:
  Simple Distillation
  Total (Liquid product) Condenser
  Partial (Liquid product) Reboiler
  10 Stages
  Feeds to stages 5

                           |----|
                 |------>-----| |
                 |         |1 | |
              |--|------|  |--|-|
              |  |   |----<-------->-
              |--|---|--|
              |--|---|--|
  ----->----5-|--|---|--|
              |--|---|--|
              |--|---|--|
              |  |---|-----<----|
              |------|--|    |--|-|
                     |--->---------->-
                           10|----|

 Properties:
  Raoult's law K model
  Antoine Vapour pressure
  None Enthalpy
   Enthalpy reference state Vapour
   Enthalpy reference temperature 25.00 ( C)
   Formation enthalpies Excluded
   Exergy surroundings temperature 25.00 ( C)

 Reactions:

 Specifications:

  Column pressure
   Condenser pressure 1.115 (bar)
   Top pressure 1.115 (bar)

  Default efficiency = 1.000 (-)

  Feed                                 1 
   Stage                               5 
   Pressure (bar)                  1.115 
   Enthalpy (kJ/kmol)                    
   Vapour fraction (-)            0.0000 
   Temperature ( C)                      
   Component flows (mol/s)      
   Benzene                         5.874 
   Toluene                         5.874 

  Condenser
   Reflux ratio = 2.000 (-)
   Initialization guess: *

  Reboiler
   Bottom product flow rate = 5.874 (mol/s)
   Initialization guess: *

 Solve options:
  Automatic Initialization
  Newton's method
  Flow Step limit 0.5000 (-)
  Temperature Step limit 10.00 ( C)
  Composition Step limit 1.000 (-)
  Accuracy = 0.0001
  Maximum iterations = 30
  Feeds type = Stage below
  User program = CSW

Iteration history

ChemSep - Flash/Col2 v4.00s
Copyright(c) H.Kooijman and R.Taylor, 1988-2000
Checking data file F:\CS\WWW\CURRENT\DOWNLO~1\BT1.SEP
 Reading configuration
 Reading component property libraries
 Reading thermodynamic property options
 Reading specifications
 Checking Component Data
  Benzene                                           
  Toluene                                           
 Determining feed conditions
Generating initial flow profiles
Generating initial composition profiles
 Starting Newtons method         
Ctrl-Break will terminate execution

      Iteration              Error

         0                   7.1364E-04
         1                   2.1626E-03
         2                   3.4729E-06
Convergence obtained in 2 iterations                         
 Generating equilibrium data

Tables

Mass and Energy Balances

 Stream / Apparatus               Mass (mol/s)   Energy (MW)    Exergy (MW)

 Feed 1                            11.75          0.0000         -0.8236   
 Top                               -5.873         -0.0000        0.3601    
 Bottom                            -5.874         -0.0000        0.4581    
 Condenser Duty                                   0.0000         0.0000    
 Reboiler Duty                                    0.0000         0.0000    
                                  ----------- +  ----------- +  ----------- +
 Balance                           -3.958E-05     0.0000         -0.005415 

 Thermodynamic efficiency = -0.0000   



 Component discrepancies (mol/s)

 Benzene                           -1.722E-05
 Toluene                           -1.929E-05

 Stage Temperature Pressure              Flow rates (mol/s)
          ( C)         (bar)      Liquid     Vapour     Feed     Product

    1 85.09      1.115      11.75                            5.873      L 
    2 87.14      1.115      11.75      17.62                 
    3 89.85      1.115      11.75      17.62                 
    4 92.88      1.115      11.75      17.62                 
    5 95.71      1.115      23.49      17.62      11.75      
    6 98.02      1.115      23.49      17.62                 
    7 101.1      1.115      23.49      17.62                 
    8 104.7      1.115      23.49      17.62                 
    9 108.0      1.115      23.49      17.62                 
   10 110.6      1.115                 17.62                 5.874      L 

 Profile for Toluene

  Stage     Liquid (-)          Vapour (-)          K  (-)

      1     0.07432             0.03065             0.4124    
      2     0.1683              0.07432             0.4415    
      3     0.2839              0.1370              0.4825    
      4     0.4023              0.2140              0.5320    
      5     0.5037              0.2930              0.5817    
      6     0.5807              0.3630              0.6251    
      7     0.6772              0.4658              0.6878    
      8     0.7771              0.5943              0.7648    
      9     0.8628              0.7276              0.8432    
     10     0.9256              0.8419              0.9096    

 Profile for Toluene

  Stage     Liquid (-)          Vapour (-)          K  (-)

      1     0.07432             0.03065             0.4124    
      2     0.1683              0.07432             0.4415    
      3     0.2839              0.1370              0.4825    
      4     0.4023              0.2140              0.5320    
      5     0.5037              0.2930              0.5817    
      6     0.5807              0.3630              0.6251    
      7     0.6772              0.4658              0.6878    
      8     0.7771              0.5943              0.7648    
      9     0.8628              0.7276              0.8432    
     10     0.9256              0.8419              0.9096    

 Stream                     Feed 1      Top         Bottom      

 Stage                      5           1           10          
 Pressure (bar)             1.115       1.115       1.115       
 Vapour fraction (-)        0.0000      0.0000      0.0000      
 Temperature ( C)           95.60       85.09       110.6       
 Enthalpy (kJ/kmol)         0.0000      0.0000      0.0000      
 Entropy (J/kmol/K)         2.352E+05   2.057E+05   2.616E+05   

 Mole flows (mol/s)         
 Benzene                    5.874       5.437       0.4369      
 Toluene                    5.874       0.4365      5.437       

 Total molar flow           11.75       5.873       5.874       

 Mole fractions (-)         
 Benzene                    0.5000      0.9257      0.07438     
 Toluene                    0.5000      0.07432     0.9256      

 Mass flows (kg/s)          
 Benzene                    0.4588      0.4247      0.03413     
 Toluene                    0.5412      0.04022     0.5010      

 Total mass flow            1.0000      0.4649      0.5351      

 Mass fractions (-)         
 Benzene                    0.4588      0.9135      0.06378     
 Toluene                    0.5412      0.08651     0.9362      

Graphs

Liquid compositions

Vapor compositions

K-values

Temperatures

Pressures

Flow profiles

Enthalpies

Stripping factors

Key-ratios

Relative volatilities

McCabe-Thiele