Influence of platinum on mordenite properties and catalytic activity towards cyclohexene epoxidation. (15th January 2023)

• Record Type: Journal Article
• Authors: Tamizhdurai, P.; Mythily, R.; Kavitha, C.; Mangesh, V.L.; Kumaran, R.; Krishnan, P. Santhana; Sivaramakrishnan, T.; Augustine, T.; Govindasamy, Mani; Alothman, Asma A.; Ouladsmane, Mohemed
• Is Part Of: International journal of hydrogen energy. Volume 48:Number 5(2023)
• Page Start: 1773
• Page End: 1784
• Publication Date: 2023-01-15
• Subjects: Pt/mordenite -- Cyclohexene oxidation -- Acid leaching -- Characterization -- Dealumination; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.10.072
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: 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 H2 O2 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. Graphical abstract: Image 1 Highlights: 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.