Page 383 - Chemical engineering design

WISNIAK,J. and TAMIR, A. (1980) Liquid-liquid Equilibria and Extraction: A Literature Source Book,Parts A
and B. DESIGN INFORMATION AND DATA 357
WISNIAK,J. and HERSKOWITZ, M. (1984) Solubility of Gases and Solids, 2 vols. (Elsevier).
YAWS, C. L. (1977) Physical Properties (McGraw-Hill).
YAWS, C. L. (ed) (1999) Chemical Properties Handbook (McGraw-Hill).
Yaw’s Handbook of Thermodynamic and Physical Properties of Chemical Compounds (2003) Knovel.
8.18. NOMENCLATURE

Dimensions
in MLTq
A Coefficient in the Antoine equation
A 1,2 Coefficients in the Wilson equation for the binary pair 1, 2
a Coefficient in the Redlich Kwong equation of state
B Coefficient in the Antoine equation q
L
B i Second viral coefficient for component i M 1 3
b Coefficient in the Redlich Kwong equation of state
C Coefficient in the Antoine equation q
2 2 1
C p Specific heat capacity at constant pressure L T q
2 1
D L Liquid diffusivity L T
2 1
D v Gas diffusivity L T
f i Fugacity coefficient for component i
f OL Standard state fugacity coefficient of pure liquid
i
2 2
H Specific enthalpy L T
2 2
H 0 Excess specific enthalpy L T
L
I Souders’ index (equation 8.9) M 1 3
K Equilibrium constant (ratio)
K 0 Equilibrium constant for an ideal mixture
q
k Thermal conductivity MLT 3 1
q
k m Thermal conductivity of a mixture MLT 3 1
2 2
L v Latent heat of vaporisation L T
2 2
L v,b Latent heat at normal boiling point L T
M Molecular mass (weight) M
n Number of components
T
P Pressure ML 1 2 or L
T
P c Critical pressure ML 1 2
P ch Sugden’s parachor (equation 8.23)
P 0 Vapour pressure of component i ML 1 2 or L
T
i
T
P k Vapour pressure of component k ML 1 2 or L
P r Reduced pressure
L
P c Critical constant increment in Lydersen equation (equation 8.26) M 1/2 1/2 T
2 2 1
R Universal gas constant L T q
T Temperature, absolute scale q
T b Normal boiling point, absolute scale q
T c Critical temperature q
T r Reduced temperature
T c Critical constant increment in Lydersen equation (Equation 8.25)
t Temperature, relative scale q
L
V c Critical volume M 1 3
L
V m Molar volume at normal boiling point M 1 3
L
V c Critical constant increment in Lydersen equation (Equation 8.27) M 1 3
v i Special diffusion volume coefficient for component i (Table 8.5) L 3
v 0 i Liquid molar volume M 1 3
L
w Mass fraction (weight fraction)
x Mol fraction, liquid phase
y Mol fraction, vapour phase
z Compressibility factor