Page 42 - Applied Process Design For Chemical And Petrochemical Plants Volume II

Distillation 31

subscripts: For packed towers, the corresponding relation for trays
h = heavy is [84]:
min = minimum
P = for packed towers Yp = 0.763 - 0.763 x ~ . ~ ~ ~ (8 - 6OA)
T = for tray column
-
After calculating X, and solving forY using Equation 8-58, and, YP = NTU - NTv,in (8 60B)
NTU .t 2a
then solve for the theoretical trays, S, at the actual selected
reflux ratio (L/D) from the equation for Y. The equation Mapstone [122] and Zankers [123] developed the chart
appears to represent several reliable data references. shown in Figure &24B to follow Figure 824A to allow for

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(3) 8
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TIE LINE NO. 2 \

TIE LINE NO, I /
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