Water adsorption on high silica zeolites. Formation of hydroxonium ions and hydrogen-bonded adducts

被引：0
|
作者：
Sazama, Petr [1 ]
Tvaruzkova, Zdenka [1 ]
Jirglova, Hana [1 ]
Sobalik, Zdenek [1 ]
机构：
[1] Acad Sci Czech Republic, J Heyrovsky Inst Phys Chem, Vvi, CZ-18223 Prague 8, Czech Republic
来源：
ZEOLITES AND RELATED MATERIALS: TRENDS, TARGETS AND CHALLENGES, PROCEEDINGS OF THE 4TH INTERNATIONAL FEZA CONFERENCE | 2008年 / 174卷
关键词：
H(2)O adsorption; zeolite; ZSM-5; ferrierite; in-situ FTIR;
D O I：
暂无
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
An in situ high-pressure/high-temperature FTIR spectroscopy technique was used for analysis of water adsorption on ZSM-5 and ferrierite zeolites. Adsorbed water in zeolite channels is present in neutral hydrogen-bonded adducts at low coverage, whereas at higher coverage protonated species H(+)(H(2)O)(n) are formed. The protonated species are easily stabilized in narrow zeolite channels and at higher density of aluminium atoms in the zeolite framework. Moreover, formation of hydroxonium ions is supported by increasing overall pressure. Conditions combining the temperature and pressure for manifestation of both forms of water adsorption have been analyzed.
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收藏
页码：821 / 824
页数：4
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