Preparation of Al2O3-ZrO2 mixed supports;: their characteristics and hydrothermal stability

被引：20
|
作者：
Enache, D
Roy-Auberger, M
Esterle, K
Revel, R
机构：
[1] Inst Francais Petr, F-92500 Rueil Malmaison, France
[2] Univ Wales Coll Cardiff, Dept Chem, Cardiff CF10 3TB, S Glam, Wales
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2003年 / 220卷 / 1-3期
关键词：
Al2O3-ZrO2 mixed support; composite support; hydrothermal stability; alumina; boehmite; zirconia;
D O I：
10.1016/S0927-7757(03)00067-0
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：
Al2O3-ZrO2 mixed supports have been synthesised using a colloidal solution of ZrO(OH)(2) or a Zr(IV) propoxide solution in organic medium. Zirconia content in these samples was about 10% (similar to36% of the theoretic monolayer). The hydrothermal stability (alumina --> boehmite transformation at 230 degreesC, about 10 bar pressure, in the presence of water vapour) of these supports was then investigated by XRD. The presence of the zirconia over the alumina decrease the quantity of boehmite formed after the hydrothermal treatment. The dispersion of zirconia and the stability in hydrothermal conditions of the final support are function of the preparation method. (C) 2003 Elsevier Science B.V. All rights reserved.
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页码：223 / 233
页数：11
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