Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2017-08-01

Journal: JOURNAL OF CATALYSIS

Included Journals: EI、SCIE

Volume: 352

Page Number: 557-561

ISSN: 0021-9517

Key Words: WP; Hydrodesulfurization; XPS; Sulfur-containing phase; NH3

Abstract: The X-ray photoelectron spectroscopy characterization of a bulk WP hydrodesulfurization (HDS) catalyst demonstrated that the actual active surface phase of WP in the HDS of dibenzothiophene (DBT) is' a sulfur-containing phase. This tungsten phosphosulfide phase formed faster than the molybdenum phosphosulfide phase, but possessed a lower sulfur content than the corresponding Ni2P and MoP phases. NH3 was the dominant nitrogen-containing species detected in the WP catalyst after simultaneous HDS and hydrodenitrogenation reactions. NH3 decreased the DBT conversion strongly but less than piperidine, indicating that not only N-containing compounds but also NH3 inhibits the HDS activity of WP. (C) 2017 Published by Elsevier Inc.