Table for Exercise 4.1
Stage
y
4
49.30
3
36.12
2
24.74
1
16.04
Note: Delta y between top two stages = 49.30
– 36.12 = 13.18 mol% C6 change in
vapor phase.
Average delta y above and below Stage
3 = (49.30 – 24.74)/2 = 12.28 mol% C6
change in vapor phase.
Average delta y above and below Stage
2 = (36.12 − 16.04)/2 = 10.04 mol% C6
change in vapor phase.
Delta y between bottom two stages =
24.74 – 16.04 = 8.7 mol% C6 change in
vapor phase.
The MRT point would most likely be
Stage 4.
120 ◾  Appendix: Solutions to Chapter Exercises
Exercise 3.3
Economical design is 2 (17) = 34 theoretical stages.
Exercise 4.1
Exercise 4.2
Equation 4.3, distillate/feed = (0.500 −0 .001)/(0.999 − 0.001)
= 0.498