Preparation of Al2O3–ZrO2 mixed supports; their characteristics and hydrothermal stability期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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

Authors:	Dan Enache Magalie Roy-Auberger Karine Esterle and Renaud Revel

Institution:	^a Institut Français du Pétrole, 1 et 4 Avenue Bois Préau, 92500, Rueil Malmaison, France ^b Chemistry Department, Cardiff University, PO Box 912, CF10 3TB, Cardiff, UK

Abstract:	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% (36% of the theoretic monolayer). The hydrothermal stability (alumina→boehmite transformation at 230 °C, 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.

Keywords:	Al₂O₃–ZrO₂ mixed support Composite support Hydrothermal stability Alumina Boehmite Zirconia
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