Page 282 - Adsorption Technology & Design, Elsevier (1998)

Nomenclature 257

V volume of equilibrium stage
molar volume of pure component i
Vi ~
volume of fluid phase in equilibrium stage
VL
molar volume
Vm
total volumetric capacity of adsorbent to adsorb
Vo
V~ volume of adsorbed phase in equilibrium stage
equilibrium mol fraction of i in adsorbed phase
Xi
xj equilibrium mol fraction of j in adsorbed phase
yl mol fraction of component I in the fluid phase
Yi equilibrium mol fraction of i in fluid phase
Yj equilibrium mol fraction of j in fluid phase
general length along packed bed
Z
length variable
Z
dimensionless radius of particle
Z
number of molecules to complete a monolayer
Zm
effective volume of adsorbate molecule
t/
separation factor
t~
(= Dc Rp2/Dp Rc 2) solution parameter for equation (4.27)
~t
affinity coefficient
parameter defined in equation (6.49)
(= 3 a (1-ep)qo/epCo) solution parameter for equation (4.27)
P
y = h a rcE/csDe) parameter in Figure 4.7
y (= (1 -e) Kus/e u) parameter in equation (7.17)
activity coefficient of component i in the adsorbed phase
yi
coefficients in equations (6.73), (6.74) and (7.23)
yl, )'2
6 (= AH (Oq*/OT)/cs) parameter in equation (4.39) and Figure 4.7
AH heat (enthalpy) of adsorption
AP pressure drop
/;
adsorption potential
particle voidage
r/ (= 2t R/q*) cycle efficiency
0 fraction of surface covered by adsorbate
|
ratio of qualtity adsorbed to quantity in monolayer
|
dimensionless temperature
constant in Dubinin equation (3.20)
- qoi) parameter for solution of equation (4.26)
(= (qo - qoi) ] (qm
thermal conductivity of fluid
Af
A dimensionless parameter accounting for variation in fluid phase
adsorbate concentration
chemical potential
viscosity
first moment of response