Utilization Low Rank Coal Bottom Ash as TiO_2 Support for Oxidation Catalyst of Styrene with Hydrogen Peroxide Aqueous

摘要

One of the coal combustion ashes is coal bottom ash. Low rank coal bottom ash can act as TiO_2 catalyst's support which was calcined at varying temperature, has been created. The low rank coal bottom ash model was collected from low rank coal which burned in muffle furnace at 800 °C for 2 h. Subsequently, the low rank coal bottom ash was impregnated with titanium(IV) isopropoxide (Ti(PrO)_4) 500 umol, and then calcined at variation temperature of 300, 400, 500, 600 and 700 °C. The modified physiochemical property of catalysts were determined UV-vis spectroscopy, N_2 adsorption-desorption and hydrophobicity test. The performances of the catalysts were tested for styrene oxidation with H_2O_2 aqueous as oxidant. It is found that the low rank coal bottom ash was as good catalyst support, whereby TiO_2 supported low rank coal bottom ash which calcined at 400 °C possessed the best catalytic activity with styrene conversion 45% and selectivity 87%.