Macroporous 3D carbon-nitrogen (CN) confined MoOx catalyst for enhanced oxidative desulfurization of dibenzothiophene |
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| Institution: | 1. Center for Computational Chemistry and Molecular Simulation, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China;2. Department of Chemical and Biological Engineering, Case Western Reserve University, Cleveland, OH 44120, United States;1. Institute for Nano Science and Nano Technology, Sharif University of Technology, 11365-9465 Tehran, Iran;2. Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran 11365-9465, Iran;3. Nanotechnology Research Center, RIPI, Tehran 14857-33111, Iran;1. Department of Environmental Engineering, School of Water and Environment, Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas, Chang''an University, Xi''an 710061, China;2. Department of Chemical Engineering, School of Water and Environment, Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas, Ministry of Education, Chang''an University, Xi''an 710054, China;3. Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry & Material Science, Northwest University, Xi''an, Shaanxi 710127, China;1. School of Chemistry and Chemical Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China;2. School of Environment and Safety Engineering, Institute of Environmental Health and Ecological Security, Jiangsu University, Zhenjiang 212013, PR China |
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| Abstract: | Macroporous 3D carbon doped with nitrogen confined Mo catalyst (MoOx@CN) had been prepared by a facile one-step pyrolysis technique using silica as a template and was employed for oxidative desulfurization (ODS) of dibenzothiophene (DBT) in model fuel with H2O2 as oxidant. The effect of different operating conditions (i.e., reaction temperature and time, catalyst dosage, H2O2/DBT (O/S) molar ratio) were also systematic investigated. Under the optimal reaction condition, MoOx@CN catalyst exhibited highly excellent ODS performance toward DBT, the highest sulfur removal efficiency can be up to 99.9% and sulfur content was wiped out from 800 ppm to 10 ppm. Due to the robust 3D structure promoting rapid transfer, in addition to the increased number of active sites induced by the Mo vacancies, the catalyst, prepared using chitosan and ammonium heptamolybdate in a mass ratio of 1:0.5, displayed rapid kinetics and low activation energy in the oxidation of dibenzothiophene. Moreover, it exhibited excellent recyclability after five cycles without any obvious decrease in catalytic activity for the oxidative desulfurization reaction. |
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| Keywords: | Oxidation desulfurization Mo vacancies Dibenzothiophene Nanoparticles |
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