Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-03-01

Journal: CATALYSIS LETTERS

Included Journals: Scopus、EI、SCIE

Volume: 144

Issue: 3

Page Number: 531-537

ISSN: 1011-372X

Key Words: Oxidative desulfurization; Dibenzothiophene; Cumene hydroperoxide; MoO3; Partial reduction

Abstract: The XPS, XANES, and UV-Vis results revealed that oxygen vacancies were formed in the surface of MoO3/SiO2 by impregnation of the catalyst with citric acid followed by a temperature-programmed heating under N-2 atmosphere. The presence of the induction period during the oxidative desulfurization (ODS) of dibenzothiophene over these Mo-based catalysts using cumene hydroperoxide as the oxidant suggests that the reaction would follow a free radical mechanism. Both the higher ODS activity and the faster deactivation of the modified catalysts give evidences that the oxygen vacancies should possess a high ODS activity.