Kinetic Study of Styrene Oxidationover Titania Catalyst Supported onSulfonated Fish Bone-derived Carbon

Abstract

The kinetic evaluation of titania supported sulfonated fish bone-derived carbon (TiO2/SFBC) as a catalyst in sty-rene oxidation by aqueous hydrogen peroxide was carried out. The catalysts were prepared by carbonation of fish-bone powder at varying temperatures 500, 600 and 700 °C, respectively for 2 h, followed by sulfonation with sulfu-ric acid (1M) for 24 h and impregnated by varied titania concentration 500, 1000 and 1500 μmol. The physical properties of catalysts were characterized using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX) and the nitrogen adsorption-desorption analysis. The catalytic activity result showed that TiO2/SFBC can be used as a potential catalyst in sty-rene oxidation. Worth noting that the sulfonation process has not only transformed the TiO2/FBC particulates (without sulfonation) to cuboid-shaped TiO2/SFBC (with sulfonation) but also contributed to the high selectivity of benzaldehyde. On the other hand, carbonization at different temperatures has an indistinct effect on catalytic per-formance due to their similar surface areas. The styrene conversion rate responded positively with the increasing amount of titania in the functionalized composites. The styrene oxidation by aqueous H2O2unraveled the first-order reaction with the activation energy of ⁓63.5 kJ.