Is. Park et al., Frequency response of adsorption of a gas onto bidisperse pore-structured solid with modulation of inlet molar flow-rate, KOR J CHEM, 18(3), 2001, pp. 330-335
We present a theoretical analysis of the frequency response of a continuous
-flow adsorber for adsorption of a gas onto bidisperse pore-structured soli
d, forced by the periodic modulation of the inlet now-rate. Spherical macro
particle and spherical microparticle geometries are considered. A local ads
orption equilibrium of the gas on the exterior surface of microparticle is
assumed. It is confirmed that the in-phase characteristic function of the f
requency response of a flow adsorber is independent of the overflow paramet
er, but that the out-of-phase characteristic function is a strong function
of the overflow in the lower frequency region. The overall characteristic f
unctions in the microparticle diffusion regime have information of both mic
roparticle diffusion and macropore diffusion. Hence, in this regime we can
extract the macropore diffusion parameter as well as the microparticle diff
usion parameter from the experimental data of the overall characteristic fu
nctions. In the microparticle diffusion regime the capacity parameter of mi
croparticle affects also the characteristic functions.