Study 1 — Tubular Reactor
You have now defined a model for a nonisothermal tubular reactor. You can then solve the model equations, analyze the results, and move on to study the related membrane reactor model.
1
In the Model Builder window, right-click Study 1  and choose Rename .
2
In the Rename Study dialog, type Tubular reactor in the New label text field.
3
Click OK.
Step 1: Stationary Plug Flow
For the tubular reactor case, disable the Additional Source feature . This source term is only valid for the membrane reactor.
1
Expand the Tubular reactor node  and click Step 1: Stationary Plug Flow .
In the present example, the total reactor volume is 1 m3, so the default settings for Volumes (available in the Study Settings section) can be used.
2
In the Settings window for Stationary Plug Flow , locate the Physics and Variables Selection section.
3
Select the Modify model configuration for study step checkbox.
4
In the tree, select Component 1 > Reaction Engineering (re)  > Additional Source 1 .
5
Click Disable .
6
In the Home toolbar, click Compute .
Results
Molar Flow Rate (re)
1
In the Model Builder window, under Results right-click Molar Flow Rate (re)  and choose Rename .
2
In the Rename 1D Plot Group dialog, type Concentration and Temperature profile, tubular reactor in the New label text field.
3
Click OK.
4
Locate the Plot Settings section in the Settings window.
5
Select the y-axis label checkbox and type Concentration (mol/m<sup>3</sup>).
6
Select the Two y-axes checkbox.
7
Locate the Legend section. Choose Upper left from the Position list.
The default plot shows the molar flow rates of all species as functions of the reactor volume. Change this to plot concentrations instead.
Global 1
1
Right-click Global 1  (under Concentration and Temperature profile, tubular reactor ) and choose Rename .
2
In the Rename Global dialog, type Concentration in the New label text field, then Click OK.
3
In the Settings window, locate the y-Axis Data section and click Clear All .
4
In the table, enter the following settings instead:
Expression
Unit
Description
re.c_C6H5CH3
 
 
re.c_H2
 
 
re.c_C6H6
 
 
re.c_CH4
 
 
re.c_C12H10
 
 
5
Expand the Coloring and Style section and set Width to 2.
6
In the Legends section, select Manual from the Legends list select.
7
In the table, enter the following settings:
Legends
Toluene
Hydrogen
Benzene
Methane
Biphenyl
8
To add a plot for the temperature, right-click Concentration and Temperature profile, tubular reactor , and select Global  .
9
In the Global Settings window, type Temperature in the Label text field.
10
Click Replace Expression  and select
Component 1 > Reaction Engineering > re.T - Temperature
11
Locate the y-Axis section and select Plot on secondary y-axis checkbox.
12
In the Coloring and Style section, set Width to 2.
13
In the Legends section, select Manual from the Legends list.
14
On the first row of the Legends table, type Temperature.
15
Click plot  on the Concentration and Temperature profile, tubular reactor toolbar.