Page 34 - Separation process engineering

vapor flow rate, kg/h or lb/h
x

weight or mole fraction in liquid

x
[L/D – (L/D) min ]/(L/D + 1) in Eqs. (7-42)

x*
equilibrium mole fraction in liquid

x A,ref , x B,ref

fractions to calculate velocity of center of total flux, Eq. (15-17)
x , x
i,k i,k+1
trials for integration, Eq. (8-29)

x I

interfacial mole fraction in liquid
x* out

liquid mole fraction in equilibrium with inlet gas, Eq. (16-35b)

X
weight or mole ratio in liquid
y

weight or mole fraction in vapor

y vol
volume fraction in vapor

y*

equilibrium mole fraction in vapor
y* out

vapor mole fraction in equilibrium with inlet liquid in countercurrent system,
Eq. (16-35a) or in equilibrium with outlet liquid in cocurrent contactor, Eq.
(16-71)

y lm
log mean difference, Eq. (15-32d)

y I

interfacial mole fraction in vapor

mass fraction in vapor

Y
weight or mole ratio in vapor

z
weight or mole fraction in feed

z