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Comparison study on molybdena-titania supported on TUD-1 and TUD-C: properties and catalytic performance

Lee, Siew Ling and Yuliati, Leny and Ooi, Yee Khai (2018) Comparison study on molybdena-titania supported on TUD-1 and TUD-C: properties and catalytic performance. In: The 3rd International Conference of Materials Research Society of Indonesia (MRS-id) Meeting 2018.

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Official URL: http://dx.doi.org/10.1088/2053-1591/ab12be

Abstract

A direct comparison between nanostructured Technische Universiteit Delft-1 (TUD-1) and Technische Universiteit Delft-Crystalline (TUD-C) as catalyst supports for molybdenum doped titania catalysts was carried out. The characterizations results showed that TUD-1 is a mesoporous amorphous silicate material with high surface area and porosity. Meanwhile, TUD-C is an ordered mesoporous crystalline aluminosilicate matters featured high acidity. In fact, TUD-C was obtained from the modification of TUD-1 with the addition of aluminium isopropoxide as the zeolite precursor. The catalytic testing demonstrated TUD-1 supported 1 mol% molybdena doped titania was inactive for epoxidation of 1,2-epoxyoctane and showed moderate activity (18%-21% conversion yield) and selectivity (approximately 70%) in epoxidation reaction of 1,2-epoxycyclohexane (0.51 mmol) and styrene oxide (1.25 mmol). Meanwhile, TUD-C supported 1 mol% molybdena doped titania achieved remarkably higher conversion yield for 1,2-epoxyoctane (2.7 mmol), 1,2-epoxycyclohexane (4.8 mmol) and styrene oxide (6.2 mmol) respectively with 100% selectivity towards all 3 analytes under ambient condition with constant stirring. The results strongly indicated that high Bronsted and Lewis acidic sites existed within the TUD-C framework is the key factor for the exceptional oxidative capabilities for molybdena-titania catalysts.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:catalysts, crystalline materials
Subjects:Q Science > Q Science (General)
Divisions:Science
ID Code:82457
Deposited By: Siti Nor Hashidah Zakaria
Deposited On:30 Sep 2019 14:05
Last Modified:08 Oct 2019 06:56

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