Adsorption of carbon dioxide at high pressure over H-ZSM-5 type zeolite. Micropore volume determinations by using the Dubinin-Raduskevich equation and the "t-plot" method

被引：33
作者：
Ghezini, Rachid [1 ]
Sassi, Mohamed [1 ]
Bengueddach, Abdelkader [1 ]
机构：
[1] Univ Oran, Fac Sci, Dept Chim, Lab Chim Mat, El Menaouer 31000, Oran, Algeria
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2008年 / 113卷 / 1-3期
关键词：
adsorption; carbon dioxide; Dubinin-Raduskevich equation; micropore volume; t-plot method;
D O I：
10.1016/j.micromeso.2007.11.034
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
In this paper, a study of the adsorption of carbon dioxide at high pressure and at the temperatures of 273 K and 293 K in H-ZSM-5 zeolite is reported. The results show that the measured adsorption isotherms obey the Dubinin-Raduskevich equation and the invariance condition of temperature is fulfilled. This implies that adsorption in this zeolite is not a surface process, but is rather a volume filling. The proposed methodology for the analysis of the experimental adsorption data allows the determination of the micropore volume (W-0) and the characteristic energies (E). An experimental value of W-0 equal to 0.184 cm(3)/g is obtained in good agreement with the literature. The "t-plot" method, adapted for the first time in this work to the adsorption of carbon dioxide is also used in order to calculate the micropore volume. A value of W-0 equal to 0.163 cm(3)/g is obtained in very good agreement with those found using the "t-plot" method and the universal t-equation for the adsorption of nitrogen at 77 K. (C) 2007 Elsevier Inc. All rights reserved.
引用
收藏
页码：370 / 377
页数：8
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