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Quantitative determination of Bronsted acid sites on zeolites: a new approach towards the chemical composition of zeolites

被引：97
|
作者：
Louis, B [1 ]
Walspurger, S [1 ]
Sommer, J [1 ]
机构：
[1] Univ Strasbourg 1, Fac Chim, UMR 7513, Lab Physicochim Hydrocarbures, F-67070 Strasbourg, France
来源：
CATALYSIS LETTERS | 2004年 / 93卷 / 1-2期
关键词：
acid sites; titration; H/D exchange; zeolites; Bronsted acidity;
D O I：
10.1023/B:CATL.0000016953.36257.88
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：
An original quantitative method based on H/D exchange between H2O/D2O molecules and the OH groups of different zeolites has been developed for the titration of the Bronsted acid sites present on the solid surface. The measured Bronsted acid sites density appears to be in good agreement with the theoretical amount estimated by the Si/Al ratio. In contrary to classical methods, this non-destructive anhydride method titrates the whole quantity of Bronsted acid sites of zeolites.
引用
收藏
页码：81 / 84
页数：4
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