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By solving a wide variety of examples it was found that the boiling range, the thermal condition of the feed, the number of plates, the initial temperature, and vapor rate profiles had no appreciable effect on the number of trials required to achieve convergence. However, as the boiling range of the feed is increased, it may become necessary to average, the temperature profiles as well as the vapor-rate profiles for successive trials.

The use of a component much lighter than the midboiling component of the mixture can introduce significant overcorrections of the temperature profiles while the use of a component much heavier than the midboiling component can lead to undercorrections of the temperature profiles. The use of the midboiling

Table 2-5 Solution sets of the component flow rates in the distillate and bottoms of Example 2-7

0.200000 X 10 0.999990 x 10 0.597230 x 10 0.1234600 x 102 0.74216

c3H8

J-C4H

C2H6

c3h6

0.200000 X 10 0.999990 x 10 0.597230 x 10 0.1234600 x 102 0.74216

0.11163 x 10~8 0.11627 x 10" 3 0.27665 x 10-1 0.15358

I-C4H10

h-C6H12 h-C7H14 n-C8 H16 400

0.20153 x 10"2 0.94035 x 10"5 0.94025 x 10"5 0.63427 x 10"7

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