TAPO-5 prepared with Ti(III): unusual catalytic activity in cyclohexene oxidation with H2O2 under anhydrous conditions
| Autor: | Alfayate Lanza, Almudena, Márquez Álvarez, Carlos, Sánchez Sánchez, Manuel, Pérez Pariente, Joaquín |
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| Rok vydání: | 2013 |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Trabajo presentado en la 5th Czech-Italian-Spanish conference on Molecular Sieves and Catalysis, celebrada en Segovia (España) del 16 al 19 de junio de 2013. Ti-containing zeolites have become relevant industrial heterogeneous catalysts in oxidation processes. On the contrary, zeotypes TAPO materials have shown scarce catalytic activity in these reactions, likely due to their different Ti environments within the microporous networks. AlPO4 frameworks are more versatile than zeolitic ones in terms of heteroatom incorporation as either Al3+ or P5+ ions could be potentially substituted. The incorporation of Sn(II) in AlPO4-5 framework, instead of the more conventional and stable Sn(IV), resulted in a material presenting better catalytic behavior in acid reactions. In this work, we have attempted to change the incorporation mechanism of Ti into AlPO4-5 framework in order to generate Ti environments different from those found in the conventional TAPO-5 by using Ti(III)3 instead of Ti(IV) sources in the synthesis gel. The final aim was the modification of the catalytic activity of TAPO-5 in cyclohexene oxidation with H2O2, in turn affected by the presence of water in the reaction medium. |
| Databáze: | OpenAIRE |
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