Influence of platinum on mordenite properties and catalytic activity towards cyclohexene epoxidation.

The Pt-containing commercial mordenite catalyst that was synthesized having different Si/Al molar ratios (SAR) = 32, 40, and 50, and it was applied in the epoxidation reaction of cyclohexene. The samples were analysed and confirmed by various physicochemical techniques in powder X-ray diffraction (XRD) for identifying phases and planes, Brunauer-Emmett-Teller (BET) for determining textural properties, Fourier-transform infrared spectroscopy (FT-IR) for distinguishing functional groups, high resolution scanning electron microscopy (HR-SEM) for finding morphology, temperature-programmed desorption (TPD) to determine stability, and transmission electron microscopy (TEM) to identify microstructural details. The catalysts were tested for cyclohexene epoxidation reaction in the presence of H 2 O 2 as oxidant and acetonitrile as solvent. In this work, cyclohexene maximum conversion and selectivity is obtained with Pt/mordenite (40%) catalyst among the catalysts investigated. The conversion of cyclohexene oxidation recyclability of the Pt/Mordenite (40%) reveals reasonably acceptable conversion efficiency after six cycles, and the catalyst is found to be most suitable for an industrial production application. [Display omitted] • The commercial mordenite zeolite was dealuminated successfully by acid leaching method. • The BET, SEM and TEM confirms the enhanced textural properties and suitable morphology of mordenite (40) support. • Highly effective Pt/mordenite catalyst for cyclohexene oxidation. • Higher conversion and selectivity were seen over Pt/mordenite (40) catalyst for the cyclohexene oxidation at 90 °C. [ABSTRACT FROM AUTHOR]