Page 34 - Applied Process Design For Chemical And Petrochemical Plants Volume II
P. 34
Distillation 23
0.3
0.2
0.2
I
0.1 0.
Xo[l+(Oc-l)(xF)]-axF
xD = Mol Fraction Low Bailer in Overhead (LID),= (-Min. Reflux Ratio)
S X ~ -xF [I+("c-I)(xF~
xF Mol Fraction Low Boiler in Feed L/D Actual Reflux Ratio at N Plates
xB Mol Fraction Low Boiler in Boiler NM = Number of Perfect Plates at Total Reflux
oc Relative Volatility of Components ,Ave. N = Number of Perfect Plates ot LID Reflux
Figure 8-16. Approximate solution for N and U/D in distillation of ideal binary mixtures. Used by permission, Faasen, J.W., lndusffid & Eng.
Chmiw, V. 36 (1944), p. 248., The American Chemical Society, all rights reserved.
10-
Minimum Reflux at Infinite Theoretical Plates
9- 10.0
8-
7-
- 6-
n
- 5-
:
4-
3-
2-
I;
O t
=:-..- .a:-:-..- -&I.... .I...-u.C..rl
-*
xg = Mol Fraction Low Boiler in Overhead plates. Used by permission, The American Chemical
XF = Mol Fraction Low Boiler in Feed Society, Smoker, E. H., Ind. Eng. Chern V. 34 (1942), p.
6 = Relative Volatility
