Hierarchical Zeolites Containing Vanadium or Tantalum and Their Application in Cyclohexene Epoxidation Reaction

The aim of this study was the synthesis, characterization, and catalytic application of new hierarchical materials modified with tantalum and vanadium ions. These materials exhibit secondary porosity, thus allowing the reactant molecules to access the active sites of the material while maintaining the acidity and crystallinity of the zeolites. Based on the results, these systems were found to be highly active and selective in the oxidation of cyclohexene. The performance of the catalysts was compared in oxidation processes carried out by conventional and microwave-assisted methods. Microwave-assisted experiments showed that in the presence of a hierarchical FAU zeolite containing Ta, long reaction times could be shortened with increased activity and selectivity under the same residual experimental conditions.

Automated summary

This study aims to synthesize, characterize, and apply new hierarchical materials modified with tantalum and vanadium ions. These materials have secondary porosity, allowing reactant molecules to access active sites while maintaining acidity and crystallinity. The results show that these systems exhibit high activity and selectivity in the oxidation of cyclohexene. Comparison of conventional and microwave-assisted oxidation processes reveals that the hierarchical FAU zeolite with Ta can shorten reaction times and improve activity and selectivity under the same experimental conditions.