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The Effect of Thermal Pre-Treatment on Structure, Composition, Basicity and Catalytic Activity of Mg/Al Mixed Oxides
Topics in Catalysis; Vol 56; Issue 9-10; 2013; Pages 586-593
- Category: Článek v odborném periodiku (Article in a professional journal)
- Author: Čapek Libor, Hájek Martin, Kubička David, Kutálek Petr, Smoláková Lucie, Troppová Ivana
- ISSN: 1022-5528
- Year: 2013
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Link:
URL
- DOI: 10.1007/s11244-013-0008-3
Review
The goal of this work is to study the effect of thermal pre-treatment of Mg/Al mixed oxides (450-1,050 A degrees C) on their structure, basicity and catalytic activity in transesterification of rapeseed oil. The catalytic activity of Mg/Al catalysts was shown to depend not only on the amount of basic sites, but also on crystallite size of MgO, specific surface area and population of medium/strong basic sites. Moreover, high stability of Mg/Al-550 was established by re-using the catalyst four times. It was associated with negligible magnesium leaching from the solid catalyst to liquid phases.