| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 229031 | Journal of Industrial and Engineering Chemistry | 2013 | 6 Pages |
Abstract
A method for directly measuring gas diffusivity in a washcoat layer was established by preparing a simulated washcoat layer and modifying a Wicke–Kallenbach type counter-current diffusion cell. Three pairs of gases, N2Ar, CO2Ar and C3H8Ar, were used in the measurements. It was found to be possible to evaluate the pore-transport parameters of the washcoat layer based on the mean transport pore model and the modified Stefan–Maxwell equation. Analysis of the gas diffusion mechanism in the washcoat layer showed that bulk and Knudsen diffusion took place simultaneously, and the percentage value of the contribution by Knudsen transport to net diffusion transport was evaluated.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Satoru Kato, Hironobu Ozeki, Hiroshi Yamada, Tomohiko Tagawa, Naoki Takahashi, Hirofumi Shinjoh,