Page 280 - Adsorption Technology & Design, Elsevier (1998)

Nomenclature 255

kd rate constant for desorption
ke effective thermal conductivity
fluid film mass transfer coefficient
kf
axial thermal conductivity coefficient
kL
overall mass transfer coefficient
ko
K equilibrium constant in Henry's law isotherm
l length
L pellet length, column length
L length or height of packed bed
length of equilibrium section of packed bed
Le
LUB length of unused bed
mass of molecule
m
maximum volumetric capacity for micropore filling
mo
mt mass adsorbed at time t
moo mass adsorbed when adsorption completed
M mass of adsorbent
M molecular mass
n dimensionless index in Freundlich equation (3.13)
n number of moles adsorbed per unit mass of adsorbent
n number of moles
n number of components
n exponent in equation (6.66)
N number of stages
N number of theoretical plates in chromatographic column
No adsorptive capacity
NTU number of transfer units
partial pressure
P
p~ pressure on adsorption
pd pressure on desorption
vapour pressure of i at same spreading pressure and temperature as
pi ~
admixture
saturated vapour pressure
ps
P total pressure
Pe' (= udp/DL) Peclet number
Pr (= cf/~/;I,f) Prandtl number
q quantity adsorbed
q amount adsorbed per unit weight of adsorbent
q
average quantity adsorbed per particle volume
q*
quantity adsorbed at equilibrium
quantity adsorbed in a monolayer
qm
qo initial quantity adsorbed
qo quantity adsorbed at particle periphery