The adsorption isotherms for N2 over zeolite samples with various structure types or various crystal sizes have been investigated systematically. It is interesting to note that the powder samples of zeolites with cavity structures show oscillation phenomena in their adsorption isotherms on logarithmic x-axis, but the samples without cavities do not show this phenomenon. With increase in the size of the zeolite crystals, the oscillation phenomenon becomes more remarkable. If crystals are large enough and have complex channel structures, even if they do not have cavities, they also exhibit a slight oscillation phenomenon. These results are very helpful to pre-determine which model should be applied for a new sample with an unknown structure, and to get more reliable data on its pore size distribution when Horvath-Kawazoe equation is used to calculate its pore size distribution.
|Original language||English (US)|
|Number of pages||12|
|Journal||Microporous and Mesoporous Materials|
|State||Published - Feb 2001|
Bibliographical noteFunding Information:
This work was supported by the State Basic Research Project (grant number G2000077507), the National Natural Science Foundation of China (grant number 29825108, 29733070, and 29873017), Outstanding Junior Faculty of Education Committee of China, and National Advanced Materials Committee of China (NAMMC, grant number 863-715-004-0210).
- Adsorption isotherms on logarithmic x-axis
- Pore size distribution
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials