Graphical Representation on the Y-X Diagram

Any point on curve A represents compositions of vapor and liquid leaving an 

Parameters in a Fixed-Pressure Binary Column Section 

FIGURE 5.2 Equilibrium stages in a binary column section. 

As indicated by Equation 5.11, the operating line is a straight line if L/V is constant. Plotting it requires knowledge of the slope L/V and a point on the line, or two points on the line. Note that a point on the operating line has coordinates Xj and y which represent the inlet and outlet compositions at either end of the column section Xg and y, or and Jaw- 

If only one point on the operating line or only its slope is known, the number of equilibrium stages must be known in order for the column section to be defined. The operating line would then be determined by trial and error to match the specified number of stages. 

---