Page 23 - Separation process engineering
P. 23
e
absolute entrainment, mol/h
e
plate fractional free area in Karr column
erf
error function, Eq. (18-70)
E
extract flow rate (Chapters 13 and 14), kg/h
Ê
mass extract, kg
energy transfer rate on stage j from bulk liquid to bulk vapor, J/s
E k
value of energy function for trial k, Eq. (2-51)
E ML , E MV
Murphree liquid and vapor efficiencies, Eqs. (4-58) and (4-59)
E 0
activation energy, Kcal/mol
E o
Overall efficiency, Eq. (4-56)
E
pt
point efficiency, Eq. (10-5) or (15-76a)
Ê t
holdup extract phase in tank plus settler, kg
f
friction factor
f AB
friction coefficient between molecules A and B
f = V/F
fraction vaporized
f
fractional approach to flooding
f
frequency of reciprocation of Karr column, strokes/s
f(x)
equilibrium function, Chapter 9
f (V/F)
k
Rachford-Rice function for trial K, Eq. (2-43)
