期刊
APPLIED CATALYSIS A-GENERAL
卷 589, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcata.2019.117308
关键词
Oxidative desulfurization; Dibenzothiophene; Ni modified MoO3
资金
- National Natural Science Foundation of China [21972158, U1607105, 51574286]
- Shanxi Province Science Foundation for Youths [201701D211005]
- Scientific and Technological Funding of Qinghai Province [2018-GX-101, 2018-ZJ-722, 2019-HZ-808]
- CAS Interdisciplinary Innovation Team [BK2018001]
- Youth Innovation Promotion Association CAS [2015141, 2016377]
- Excellent Youth Scholars of State Key Laboratory of Coal Conversion [2016BWZ001]
- Excellent doctor introduction fundation of Shanxi Province [SQ2019006]
Ni modified MoO3 (Ni-MoO3) had been synthesized by a facile one-step hydrothermal technique and was used for oxidative desulfurization (ODS) of dibenzothiophene (DBT) in the decalin/acetonitrile biphasic system with H2O2 as oxidant, the effect of different operating conditions was investigated. Under the optimal reaction condition, Ni-MoO3 catalyst showed excellent ODS performance toward DBT, the highest sulfur removal efficiency can be up to 99.8% and sulfur content was wiped out from 5000 to 10 ppm, which is more effective than the recent reported MoO3-based catalysts. The reaction kinetics obeyed the pseudo-first-order equation with an apparent rate constant of 0.076 min(-1), which is twice that of pure MoO3 (0.035 min(-1)). The ODS mechanism of DBT with Ni-MoO3 was explored by combining radical scavenger, FT-IR experiments and theoretical analysis, proving that surface oxygen vacancies and Lewis acid sites play important roles in the high-efficiency ODS reaction with Ni-MoO3 catalyst.
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