Adsorption properties of nitrogen, carbon dioxide and nitrogen dioxide onto mesoporous chromium silicate

被引：2
|
作者：
Katoh, M [1 ]
Tomida, T [1 ]
Shinkawa, M [1 ]
Aihara, H [1 ]
机构：
[1] Univ Tokushima, Fac Engn, Dept Chem Sci & Technol, Tokushima 7708506, Japan
来源：
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY | 2005年 / 11卷 / Suppl 1期
关键词：
adsorption; mesoporous chromium silicate; carbon dioxide; nitrogen dioxide;
D O I：
10.1007/s10450-005-5927-2
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The adsorption properties of nitrogen, carbon dioxide and nitrogen dioxide onto mesoporous chromium silicates (Cr-FSM-16) were studied by spectroscopic analyses. The Cr-oxide moieties are highly dispersed in the framework of FSM-16. The UV-vis spectra of the Cr-FSM-16 exhibit three distinct absorption bands, which can be assigned to charge transfer from O2- to Cr6+ of the tetrahedrally coordinated Cr-oxides moieties. The results of initial heat of adsorption Of CO2 indicated the interaction between Cr6+= O2- in Cr-FSM-16 and CO2 was weak. The decomposition of NO2 by FSM-16 or Cr-FSM-16 was caused by Si-OH site or Cr6+= O2- site, respectively. The co-adsorption models for NO2 and CO2 onto Cr-FSM-16 or FSM-16 were proposed in the end.
引用
收藏
页码：223 / 226
页数：4
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