کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5369722 | 1388451 | 2007 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Theoretical studies of argon adsorption in MCM-41 mesoporous systems Theoretical studies of argon adsorption in MCM-41 mesoporous systems](/preview/png/5369722.png)
Adsorption isotherms are predicted for spherical adsorbates in cylindrical channels of MCM-41 mesoporous materials over a wide range of temperatures by using the “fragment method”. This prediction shows that an equilibrium capillary condensation is impossible for pores with diameters smaller than 2.5Â nm. The adsorbate distribution in relatively large pore channels was described by the quasi-chemical approximation (QCA) that takes into account direct pair correlations between interacting molecules. In order to improve the lattice-gas model in the vicinity of the critical point, a calibration function that takes into account information from the fragment method, was introduced into the QCA equations. The influence of the size factor of pores on argon adsorption isotherms was demonstrated.
Journal: Applied Surface Science - Volume 253, Issue 13, 30 April 2007, Pages 5671-5675