SYNTHESIS AND CHARACTERIZATION OF AL-GA PILLARED CLAYS WITH HIGH THERMAL AND HYDROTHERMAL STABILITY

被引：63

作者：

GONZALEZ, F ^{[1
]}

PESQUERA, C ^{[1
]}

BLANCO, C ^{[1
]}

BENITO, I ^{[1
]}

MENDIOROZ, S ^{[1
]}

机构：

[1] CSIC,INST CATALISIS & PETR QUIM,MADRID 6,SPAIN

来源：

INORGANIC CHEMISTRY | 1992年 / 31卷 / 05期

关键词：

D O I：

10.1021/ic00031a007

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

This work describes the preparation and characterization of a new PILC material with mixed pillars of Al3+ and Ga3+ intercalated between the layers of montmorillonite. Various Al/Ga ratios are studied in order to obtain the most suitable physicochemical properties and the maximum stability of the products. The basal spacing of the samples obtained varies between 18.7 and 19.9 angstrom at room temperature and between 17.5 and 17.7 angstrom after thermal treatment at 500-degrees-C. The resulting material has a high thermal stability, maintaining 71% of its specific surface area after being heated at 700-degrees-C for 2 h under a dry air current. Its hydrothermal stability is also optimal: it retains 100% of its specific surface after treatment for 2 h at 500-degrees-C under a current of air saturated with water vapor at 40-degrees-C. Moreover, the surface of this material presents a large number of acid centers.

引用

页码：727 / 731

页数：5

共 19 条

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