Synthesis of Al-MCM-41/ZSM-5 composite for oxidation of norbornene to norbornene oxide

Abstract

Composite materials are engineered materials made from two or more constituent material with significantly different physical or chemical properties and the different material work together to give the composite unique properties. The incorporation of Al-MCM-41 and ZSM-5 produced micro-mesoporous composite which very significant to be used in the catalytic study. In this study, the microporous Al-MCM-41 and micro-mesopores Al-MCM-41/ZSM-5 composite have successfully by direct hydrothermal method. The resulting catalyst were characterized by X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM), Nitrogen adsorption-desorption isotherm analysis techniques, BET single point, Thermogravimetric Analysis (TGA) and 27Al Magic Angle Spinning-Nuclear Magnetic Resonance (27Al MAS NMR). Catalytic performance on Al-MCM-41/ZSM-5 composites has been carried out by oxidation of bulky molecule norbornene. Higher conversion was observed over Al-MCM-41/ZSM-5 composite 10 wt. % while the selectivity towards norbornene oxide are higher by using the Al-MCM-41/ZSM-5 composite 50 wt. % as catalyst. This is due to the increase of Bronsted acid side which lead to the increased of hydrophilic characteristic of the catalyst and resulting higher formation of norbornene oxide.