Deep desulfurization of diesel by selective oxidation using amphiphilic paradodecatungstate catalyst |
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| Authors: | Dongmei Hao Wansheng You Pengfei Liu Chenchen Li Qing Wu |
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| Institution: | 1. College of Civil Engineering, , Yantai University, Yantai, China;2. Department of Chemistry, Institute of Functionalized Materials, Liaoning Normal University, Dalian, China;3. College of Chemistry and Chemical Engineering, Yantai University, Yantai, China |
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| Abstract: | An amphiphilic paradodecatungstate catalyst, (C18H37)2N(CH3)2]9NaH2W12O42] was prepared and characterized by Fourier transform infrared spectroscopy, UV–visible spectrum, differential thermal analysis, and thermogravimetric analysis. The amphiphilic catalyst exhibits very high catalytic activity that dibenzothiophene (DBT) in model diesel can be oxidized into dibenzothiophene sulfones using hydrogen peroxide as an oxidant. The reactivity of sulfur compounds decreased in the order of DBT > 4,6-DMDBT > BT > 5-MBT. The reaction rates of these sulfur compounds are sensitive to the electron density on sulfur atoms and the steric hindrance of the substituted groups of sulfur compounds. The sulfur level of a commercial diesel after desulfurization can drop from 200 ppm to about 12 ppm. |
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| Keywords: | Oxidative desulfurization diesel amphiphilic catalyst hydrogen peroxide paradodecatungstate |
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