Page 173 - Separation process engineering

B. Explore. Obviously, equilibrium data are required, and they are available from Figure 2-2. We
already checked (Example 4-1) that CMO is a reasonable assumption. A look at Figure 4-18 shows
that the top section is the same as top sections used previously. The bottom section is also familiar.

Thus the new part of this problem is the middle section. There will be two feed lines and three
operating lines.
C. Plan. We will look at the two feed lines, top operating line, bottom operating line, and middle
operating line. The simple numerical calculations will also be done here.

Feed 1: Saturated vapor, q = 0, slope = 0, y intercept = z /(q − 1) = 0.3, intersection at y = x = z =
1 1 1 1
0.3.

Feed 2:

The feed stage for feed 2 looks schematically as shown in the figure:

Then, L below feed = L′ = L + F + c
2
Amount condensed = c = (1/4) F ,
2