Journal
CATALYSIS LETTERS
Volume 144, Issue 3, Pages 531-537Publisher
SPRINGER
DOI: 10.1007/s10562-013-1141-0
Keywords
Oxidative desulfurization; Dibenzothiophene; Cumene hydroperoxide; MoO3; Partial reduction
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Funding
- Natural Science Foundation of China [20773020, 20973030, 21073022, 21173033, U1162203]
- 863 project [2008AA030803]
- NCET
- Fundamental Research Funds for the Central Universities [DUT13LK18]
- Ph.D. Programs Foundation (MOE) [201000411 10016]
- 111 project
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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.
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