b
C pw
Wall specific heat at constant pressure (per mass unit), J kg wall
À1 K
À1
y
i
Average molar fraction of species i, - - -
a p M
“Macro particle” specific area, m part
À1
b 0
Adsorbate/adsorbent interaction constant, kPa
À1
b A
Affinity constant of the site A, kPa
À1
b B
Affinity constant of the site B, kPa
À1
b i
Affinity constant of component i, kPa
À1
b i,A
Affinity constants of component i for site A, kPa
À1
b i,B
Affinity constants of component i for site B, kPa
À1
C
Column, À - -
C g,i
Bulk phase concentration of component i, mol m fluid
À3
C g,T
Total bulk phase concentration, mol m fluid
À3
C heavy
Concentration of the component with more affinity, mol m fluid
À3
C light
Concentration of component with less affinity, mol m fluid
À3
C p
Gas mixture molar specific heat at constant pressure, J mol
À1 K
À1
C s,i
Concentration of component i at the particle surface, mol m fluid
À3
C v
Gas mixture molar specific heat at constant volume, J mol
À1 K
À1
C v,ads,i Molar specific heat of component i in the adsorbed phase at constant volume, J
mol
À1 K
À1
C v,i
Molar specific heat of component i at constant volume, J mol
À1 K
À1
D
Diffusivity, m
2
Ás
À1
D ax
Axial dispersion coefficient, m bed
2 s
À1
DC
Desorbent consumption, m
3
STP,desorbent /kg
D c,i
Crystal diffusivity of component i, m part
2 s
À1
D i
Diffusivity of the component i, m
2
Ás
À1
D j
Diffusivity of the component j, m
2
Ás
À1
d p
Particle diameter, m part
D p,i
Macropore diffusivity of component i, m part
2 s
À1
D w
Bed diameter, m bed
e
Wall thickness, m bed
F obj
Objective function, À - -
h f
Film heat transfer coefficient between the gas and particle, J s
À1 K
À1 m part
À2
h w
Film heat transfer coefficient between the gas and wall, J s
À1 K
À1 m wall
À2
k f i
Film mass transfer coefficient of component i, m fluid
3 m bed
2 s
À1
L
Bed length, m bed
M
i
Molar mass of component i, kgÁmol
À1
m s
Activated adsorbent mass, kg
N
Total number of measurements performed, À - -
P
Pressure, Pa
P i
Partial pressure of component i, Pa
Prod
Productivity, kg A/B /(hÁm
3
ads )
Pu
Purity, %
q
Adsorbed amount in equilibrium with the bulk gas, mol kg
À1
Q
Flow rate, SLPM
q A,sat
Saturation capacity of site A, mol kg
À1
q B,sat
Saturation capacity of site B, mol kg
À1
q exp
The adsorbed amount obtained experimentally, mol kg
À1
q i,A,sat
Adsorption saturation capacity of component i in site A, mol kg
À1
q i,B,sat
Adsorption saturation capacity of component i in site B, mol kg
À1
q i,sat
Adsorption saturation capacity for component i, mol kg
À1
q model
Amount in the adsorbed phase predicted by the model, mol kg
À1
q sat
Adsorption saturation capacity, mol kg
À1
Q st
Isosteric heat of adsorption, J mol
À1
Perspectives of Scaling Up the Use of Zeolites for Selective Separations from. . .
187
C pw
Wall specific heat at constant pressure (per mass unit), J kg wall
À1 K
À1
y
i
Average molar fraction of species i, - - -
a p M
“Macro particle” specific area, m part
À1
b 0
Adsorbate/adsorbent interaction constant, kPa
À1
b A
Affinity constant of the site A, kPa
À1
b B
Affinity constant of the site B, kPa
À1
b i
Affinity constant of component i, kPa
À1
b i,A
Affinity constants of component i for site A, kPa
À1
b i,B
Affinity constants of component i for site B, kPa
À1
C
Column, À - -
C g,i
Bulk phase concentration of component i, mol m fluid
À3
C g,T
Total bulk phase concentration, mol m fluid
À3
C heavy
Concentration of the component with more affinity, mol m fluid
À3
C light
Concentration of component with less affinity, mol m fluid
À3
C p
Gas mixture molar specific heat at constant pressure, J mol
À1 K
À1
C s,i
Concentration of component i at the particle surface, mol m fluid
À3
C v
Gas mixture molar specific heat at constant volume, J mol
À1 K
À1
C v,ads,i Molar specific heat of component i in the adsorbed phase at constant volume, J
mol
À1 K
À1
C v,i
Molar specific heat of component i at constant volume, J mol
À1 K
À1
D
Diffusivity, m
2
Ás
À1
D ax
Axial dispersion coefficient, m bed
2 s
À1
DC
Desorbent consumption, m
3
STP,desorbent /kg
D c,i
Crystal diffusivity of component i, m part
2 s
À1
D i
Diffusivity of the component i, m
2
Ás
À1
D j
Diffusivity of the component j, m
2
Ás
À1
d p
Particle diameter, m part
D p,i
Macropore diffusivity of component i, m part
2 s
À1
D w
Bed diameter, m bed
e
Wall thickness, m bed
F obj
Objective function, À - -
h f
Film heat transfer coefficient between the gas and particle, J s
À1 K
À1 m part
À2
h w
Film heat transfer coefficient between the gas and wall, J s
À1 K
À1 m wall
À2
k f i
Film mass transfer coefficient of component i, m fluid
3 m bed
2 s
À1
L
Bed length, m bed
M
i
Molar mass of component i, kgÁmol
À1
m s
Activated adsorbent mass, kg
N
Total number of measurements performed, À - -
P
Pressure, Pa
P i
Partial pressure of component i, Pa
Prod
Productivity, kg A/B /(hÁm
3
ads )
Pu
Purity, %
q
Adsorbed amount in equilibrium with the bulk gas, mol kg
À1
Q
Flow rate, SLPM
q A,sat
Saturation capacity of site A, mol kg
À1
q B,sat
Saturation capacity of site B, mol kg
À1
q exp
The adsorbed amount obtained experimentally, mol kg
À1
q i,A,sat
Adsorption saturation capacity of component i in site A, mol kg
À1
q i,B,sat
Adsorption saturation capacity of component i in site B, mol kg
À1
q i,sat
Adsorption saturation capacity for component i, mol kg
À1
q model
Amount in the adsorbed phase predicted by the model, mol kg
À1
q sat
Adsorption saturation capacity, mol kg
À1
Q st
Isosteric heat of adsorption, J mol
À1
Perspectives of Scaling Up the Use of Zeolites for Selective Separations from. . .
187