Spectroscopic Characterization of Ni-Mo/γ-Al2O3-B2O3 Catalysts for Hydrodesulfurization of Dibenzothiophene

✍ Scribed by Dien Li; T. Sato; M. Imamura; H. Shimada; A. Nishijima

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 242 KB
• Volume: 170
• Category: Article
• ISSN: 0021-9517
• DOI: 10.1006/jcat.1997.1730

✦ Synopsis

The effects of boron on the dispersion of active metal species and hydrodesulfurization (HDS) activity of dibenzothiophene (DBT) over Ni-Mo/ -Al 2 O 3 containing boron were studied by means of BET surface area measurement, powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Mo K-edge extended X-ray absorption fine structure (EXAFS), and B K-edge X-ray absorption near-edge structure. The HDS activity of DBT over Ni-Mo/ -Al 2 O 3 -B 2 O 3 reaches a maximum at the B 2 O 3 loading of about 1 mol%, in agreement with the basal dispersion and thus with the hydrogenation ability of the catalysts. It has been proven that the combination of XRD, XPS, and EXAFS techniques gives a complete description of the dispersion of active metal species in heterogeneous environmental catalysts.