Abstract
We have prepared TiO2-Al2O3 composites by chemical vapor deposition technique using TiCl4 as a precursor. A high dispersion of TiO2 over γ-Al2O3 has been elucidated using nitrogen adsorption at 77 K, X-ray photoelectron spectroscopy and X-ray fluorescence measurements Mo/TiO2-Al2O3 (10.2 wt% TiO2) catalysts exhibit a much higher hydrodesulfurization activity for 4,6-dimethyldibenzothiophene compared to those supported on alumina or titania under mild operating conditions (573K, 3MPa). XPS investigations indicated that molybdenum phases supported on TiO2-Al2O3 composites present higher reducibility/sulfidability properties compared to those supported on alumina.