Characterisation of the basicity of modified MgO-catalysts

被引：52
作者：
Thomasson, P
Tyagi, OS
Knözinger, H
机构：
[1] Univ Munich, Inst Phys Chem, D-80333 Munich, Germany
[2] Indian Inst Petr, Dehra Dun 248005, Uttar Pradesh, India
来源：
APPLIED CATALYSIS A-GENERAL | 1999年 / 181卷 / 01期
关键词：
magnesium oxide; caesium oxide; basicity; 2-butanol decomposition; 2-methyl-3-butyn-2-ol decomposition; methane adsorption; acetylene adsorption; methylacetylene adsorption; infrared spectroscopy;
D O I：
10.1016/S0926-860X(98)00435-9
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：
The modification of magnesium oxide with caesium, barium or yttrium oxide was carried out in order to increase its base strength. The decomposition of 2-butanol and 2-methyl-3-butyn-2-ol as well as the FTIR investigation of adsorbed acid probe molecules on the catalysts were used as basicity characterisation methods. The Cs/MgO catalyst showed the highest selectivity for the dehydrogenation of 2-butanol, for the formation of l-butene as well as the highest conversion of 2-methyl-3-butyn-2-ol into acetone and acetylene. The FTIR investigations revealed the strongest basic sites in the case of Cs/MgO, while basic sites stronger than on pure MgO were not detected on Ba/MgO and Y/MgO. (C) 1999 Elsevier Science B.V. All rights reserved.
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页码：181 / 188
页数：8
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