Page 12 - Pressure Swing Adsorption

List of Symbols

a sorbate activity; externai area per umt volume for adsorbent
sample (Eq. 2.46)
A adsorbent surface area per moie (Eq, 2.10); A~ + A' (Table 5.10);
membrane area (Eq, 8.1)
A' cross-sect1onai area of column wall (Table 5.10)
ACS internal cross-sectional area of column
A, Helmholtz free energy (Ea. 2.11)
A(k,;) collocat10n coefficient for mternal (intraparticte) concentration
profile (Appendix B)
AH(j, i) collocation coefficient for velocity profile during oressunzation
(Appendix B)
Ax(], i) collocation coefficient for the external (fluid-phase) concentration
profile (Appendix B)
b Langmuir constant
bo pre-exponential factor (b = b e-•u I RT)
0
B mobility coefficient (Eq. 2.29); constant in Ea. 4.76
B(k, i) collocation coefficient for the intraparttcie (internal) phase
Laplacian
Bx(}, i) collocation coefficient for the external fluid-phase Lap!acrnn
C sorbate concentration in gas phase
co sorbate concentration m feed
C total gas-ohase concentration
cg vo!umetnc heat capacity of gas (pc.)