Abstract
Phosphotungstic acid (HPW) / mesoporous zeolite (MCM-41) were prepared using different amount of HPW loaded on MCM-41 by wet impregnation. The prepared catalysts were applied in oxidation desulfurization process, and the key reaction conditions influencing dibenzothiophene (DBT) conversion were studied, including the amount of catalyst, the volume ratio of acetonitrile to model oil, and the molar ration of H2O2 to DBT. The conversion rate of DBT reached 99.8% for 40w-HPW/MCM-41 under the optimal conditions. The structures of the catalysts were characterized before and after reaction. The density functional theory (DFT) calculation clearly revealed the stepwise reaction mechanism of DBT oxidation with HPW and H2O2. The proposed reaction path is reasonable in the kinetic modeling of oxidative desulfurization using heterogeneous HPW catalysts with H2O2.
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Acknowledgements
Authors gratefully acknowledge Natural Science Foundation of Guangdong Basic and Applied Basic Research Fund (2020A1515110729, 2020A1515110552, 2021A1515010278), Key Laboratory of General Universities in Guangdong Province (2018KSYS007), Guangdong Provincial Characteristic Innovation Projects of Universities (2018KTSCX149), Guangdong Provincial Youth Innovative Talent Projects of Universities (2018KQNCX158, 2020KQNCX051), Projects of PhD’ Start-up Research of Guangdong University of Petrochemical Technology (2020bs002).
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Wang, H., Shan, S., Li, P. et al. Deep oxidative desulfurization of model fuel catalyzed by phosphotungstic acid/mesoporous zeolite. Reac Kinet Mech Cat 135, 1999–2012 (2022). https://doi.org/10.1007/s11144-022-02237-3
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DOI: https://doi.org/10.1007/s11144-022-02237-3