| |
Moles of 
Top gas composition: 
Graphical representation of stoichiometric balance equation writing equation 9 as:
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(10) |
 are atoms of oxygen /mole of iron.
Equation 10 is equivalent to
The equation 11 is straight line of slope M passing through 
Thus we can plot  vs , which give a straight line with slope  . This plot is shown in figure 31.1
| Figure 31.1 : |
Plot of  . The slope of the line is  . |
In the figure  . This point is fixed on the ordinate as shown by A. point B on the ordinate is  according to equation 10. X-axis is .
Exit gas composition varies in between  , that is  .
Point C is 
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.JPG)
