Effect of Water Loading on Effective Diffusivity in Industrial Adsorbents

Document Type

Conference Proceeding

Publication Date


Publication Title

Adsorption Science and Technology


Transport of gases through porous materials that exhibit bimodal pore size distribution is determined by a combination of molecular, Knudsen and/or micropore diffusion. To isolate the mechanism of mass transport through such materials, transport rates of small alkane hydrocarbons were measured through single pellets of industrial adsorbents SA and 13X in a Wicke-Kallenbach set up. Experiments were performed with dry pellets as well as pellets with different levels of water loading to block the micropores present in the material. Transient responses were shifted due to water loading. Steady-state apparent effective diffusivity in 13X pellet was also affected. Macropore-micropore-macropore and micropore in series model was used to explain experimental observation.

Original Citation

Junhai Guo, D.B. Shah and O. Talu, “Effect of Water Loading On Effective Diffusivity in Industrial Adsorbents” Proceedings of 2nd Pacific Basin Conference on Adsorption Science and Technology, Editor: D.D. Do, World Scientific, Singapore, p558-562, 2000.