Title: Preparation of TiO_2-Al_2O_3 composite support and its performance in catalystic hydrodeoxygenation
Abstract: TiO2-Al2O3 composite supports were prepared by co-precipitation method and characterized by N2 physisorption,X-ray diffraction(XRD) and pyridine adsorption FT-IR spectroscopy.Ni-Mo-S/TiO2-Al2O3 supported catalysts were prepared with in-situ sulfidation method and their hydrodeoxygenation(HDO) properties were tested using phenol as model compound.The effects of aluminum sources and precipitants on the properties of TiO2-Al2O3 composite supports and the effects of support properties on the HDO properties of Ni-Mo-S/TiO2-Al2O3 catalysts were studied.The results showed that the pore volume and average pore diameter of the support prepared using aluminum chloride as aluminum source were as high as 1.12 cm3/g and 18.0 nm,respectively.The support prepared using aluminum sulfate and ammonium bicarbonate as initial materials had high specific surface area(295 m2/g).Among three precipitants,the support precipitated using ammonia solution had the most L-acid sites while the support prepared using aluminum sulfate had a little of B-acid sites.The primary factors of supports which affected the HDO properties of Ni-Mo-S/TiO2-Al2O3 catalysts were the acidity and specific surface area of supports.In the HDO of phenol on Ni-Mo-S/TiO2-Al2O3 catalyst,the conversion,the deoxygenation reaction rate and the total oxygen-free compound were as high as 81.9%,79.4% and 100%,respectively.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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Cited By Count: 1
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