Page 72 - Separation process principles 2
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2.4 Graphical Correlations of Thermodynamic Properties 37
ethylbenzene, from (2-41), K-values: Because (7), Table 2.4 will be used to compute the
K-values, first estimate the vapor pressures using (2-39). For
ethylbenzene,
-
= 39,589,800 Jhol
Similarly,
AH:^ = 40,886,700 Jhol
Similarly,
Then, applying (51, Table 2.4, using hgBv and hgV from above,
From (7), Table 2.4,
Liquid molar entropy (datum = pure components as vapor at
298.15 K and 101.3 kPa): From (6), Table 2.4 for the mixture, using
values for / T) dT and A HVap of EB and S from above,
Relative volatility: From (2-21),
2.4 GRAPHICAL CORRELATIONS OF
THERMODYNAMIC PROPERTIES
Calculations of estimated thermodynamic and other physical
properties for the design of separation operations are most
commonly carried out with computer-aided, process design
Figure 2.3 Hydrocarbon fluid
densities.
[Adapted from G.G. Brown, D.L. Katz,
G.G. Oberfell, and R.C. Alden, Natural
Gasoline and the Volatile Hydrocarbons,
Nat'l Gas Assoc. Arner., ~uisa, OK (194'8).]
Temperature OF
