The Influence of Heat Pre-Treatment on the Sorption of Water Vapour on Bentonite

被引：0
|
作者：
Pavel MokrejŠ
Arlette ZikÁnovÁ
David Hradil
Karel ŠTulÍk
VĚra PacÁkovÁ
Milan KoČiŘÍk
Mladen EiĆ
机构：
[1] Charles University,Department of Analytical Chemistry
[2] Faculty of Sciences,J. Heyrovský Institute of Physical Chemistry
[3] Academy of Sciences of the Czech Republic,Institute of Inorganic Chemistry
[4] Academy of Sciences of the Czech Republic,Department of Analytical Chemistry
[5] Charles University,J. Heyrovský Institute of Physical Chemistry
[6] Faculty of Sciences,Department of Chemical Engineering
[7] Academy of Sciences of the Czech Republic,undefined
[8] University of New Brunswick,undefined
来源：
Adsorption | 2005年 / 11卷
关键词：
adsorption; bentonite; montmorillonite; water vapour;
D O I：
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中图分类号：
学科分类号：
摘要：
Sorption isotherms of water vapour on bentonite from the Rokle locality of northwest Bohemia in the Czech Republic were measured and analysed after being treated with heat. Protracted sorption measurements were performed at 30∘C in the range of water vapour relative pressures between 0.12 and 0.94. Prior to sorption measurements, the bentonite samples were exposed to flowing dry nitrogen for 18 hours at 115, 220 and 300∘C. Compared to the sample heated at 115∘C, the bentonite samples that were treated at 220 and 300∘C exhibited a decrease in water vapour sorption capacity. This decrease in sorption capacity was accompanied by structural changes that were confirmed by X-ray diffraction analysis.
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页码：57 / 63
页数：6
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