Ultra-Deep Hydrodesulfurization of 4, 6-Dimethyldibenzothiophene over Mo Sulfide Catalysts Supported on TiO_2-Al_2O_3 Composite

摘要

We have prepared TiO_2-Al_2O_3 composites by chemical vapor deposition technique using as a precursor. A high dispersion of TiO_2 over γ-Al_2O_3 has been elucidated using nitrogen adsorption at 77 K, X-ray photoelectron spectroscopy and X-ray fluorescence measurements. Mo/TiO_2-Al_2O_3 (10.2 wt% TiO_2) 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 TiO_2-AL_2O_3 composites present higher reducibility/sulfidability properties compared to those supported on alumina.