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Oxidative desulfurization of dibenzothiophene catalyzed by molybdenum dioxide immobilized on zirconia-modified silica

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Abstract

MoO2/ZrO2–SiO2 catalysts were successfully synthesized using a facile calcination route, and their performance in the oxidative desulfurization process was studied. Experimental results revealed that 5% MoO2/ZrO2–SiO2 exhibited the highest catalytic activity. The properties of the catalysts were investigated using methods such as X-ray photoelectron spectroscopy, Fourier-transform infrared and Transmission electron microscopies. X-ray diffraction confirmed that MoO2 was present in the ZrO2–SiO2 support. Temperature programmed desorption of NH3 proved that the MoO2/ZrO2–SiO2 catalyst has more acid sites. The reaction conditions were optimized in the oxidative desulfurization process. The sulfur removal rate was 99.96% under the optimum reaction conditions of 0.06 g catalyst, 298 K, and O/S = 4, for 30 min. After eight cycles, the activity of the catalyst decreased to 88.65%.

Graphical abstract: Oxidative desulfurization of dibenzothiophene catalyzed by molybdenum dioxide immobilized on zirconia-modified silica

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Supplementary files

Article information


Submitted
13 Dec 2019
Accepted
09 Feb 2020
First published
10 Feb 2020

New J. Chem., 2020, Advance Article
Article type
Paper

Oxidative desulfurization of dibenzothiophene catalyzed by molybdenum dioxide immobilized on zirconia-modified silica

P. Zhang, Y. Tong, M. Zhu and B. Dai, New J. Chem., 2020, Advance Article , DOI: 10.1039/C9NJ06182G

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