Page 39 - Separation process engineering

k

mass transfer coefficient, typically cm/s, Eq. (17-33)

K′ solv
2
permeability of the solvent through membrane, L/(atm m day) or similar units
j

counter for stage location in staged models in Figure 17-19
J
3
2
2
3
volumetric flux, cm /(s cm ) or m /(m day), Eq. (17-1b)
J′
2
2
mass flux, g/(s cm )or g/(m day), Eq. (17-1c)

2
2
mole flux, mol/(s cm ) or kmol/(day m ), Eq. (17-1d)
K′ A
solute permeability, g/(m s wt frac)

K
m,i
rate transfer term for multicomponent gas permeation, dimensionless, Eq. (17-
11d)
L

tube length, cm
M

concentration polarization modulus in wt fraction units, dimensionless, Eq. (17-
17)
M
c
concentration polarization modulus in concentration units, dimensionless, Eq.
(17-48)

MW
molecular weight, g/mol or kg/kmol

N

number of well-mixed stages in models in Figure 17-19
p
pressure, Pa, kPa, atm, mm Hg, etc.

p A

partial pressure of species A, Pa, atm, mm Hg, etc.
p p

total pressure on the permeate (low pressure) side, Pa, kPa, atm, mm Hg, etc.

p r

total pressure on the retentate (high pressure) side, Pa, kPa, atm, mm Hg, etc.
P A