pore diffusion

pore diffusion

[′pȯr di‚fyü·zhən]
(fluid mechanics)
The movement of fluids (gas or liquid) into the interstices of porous solids or membranes; occurs in membrane separation, zeolite adsorption, dialysis, and reverse osmosis.
References in periodicals archive ?
Those membranes offer efficient hydrogen separation, by hindering the hydrogen pore diffusion through the selective adsorption of hydrocarbons.
This implies that the diffusion mechanism of MG dye onto NOAC is operated by pore diffusion which is the only rate controlling step and not film diffusion.
Then solute movement takes place by pore diffusion from surface of the particle into interior site.
Investigation of pore diffusion hindrance of monoclonal antibody in hydrophobic interaction chromatography using confocal laser scanning microscopy.
D = effective pore diffusion coefficient in spherical pellets, [m.
This suggests that the overall mechanism of reaction is predominantly pore diffusion controlled.
The definition of a pore diffusion coefficient partially overcomes this problem.
t) indicates pore diffusion coefficient (D2) from the equation 17.
The sharply rising part is the external surface adsorption stage while the second linear part is the gradual adsorption stage where intra-particle or pore diffusion is rate-limiting.
To formulate a generalized model corresponding to the dispersion flow, surface diffusion and pore diffusion mechanism, following assumptions are made:
and the relation between the pore diffusion coefficient, [D.
Moreover, the deviation of plot from the origin in intraparticle diffusion model indicated that the adsorption was not controlling by pore diffusion process.