Indexed by:期刊论文

Date of Publication:2017-08-01

Journal:JOURNAL OF CATALYSIS

Included Journals:SCIE、EI

Volume:352

Page Number:557-561

ISSN No.: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.