| This paper mainly explored to remove the thiophene sulfide compounds in model fuel oil using oxygen as oxidant. Firstly, the catalyst of H5PMo10V2O40 / CNTs was preparated and characterized by FT-IR, XRD, BET, TG and TEM. The results of characterization showed that the catalyst remained the Keggin structure of heteropoly acid and V is still active center. The super vanadium reactive oxygen species which was generated by the catalyst H5PMo10V2O40/CNTs with oxygen oxidized DBT to DBTO2. The product of reaction was characterized by FT-IR and 1-H-NMR which explained that the oxidation product was DBTO2. DBT and 4, 6-DBT can be removed completely and the removal rate of BT was only 60% in the system of H5PMo10V2O40 / CNTs as catalyst and oxygen as oxidant at the reaction time of 4 h, reaction temperature of 125?, initial oxygen partial pressure of 0.3 MPa, dosage catalyst of 0.02 g. The effect of cycloparafin hydrocarbon and aromatic hydrocarbons for DBT removal rate on ODS were obviously for different additives of hydrocarbon.To reduce the reaction temperature and the influence of cycloparafin hydrocarbon and aromatic hydrocarbons,we study the extraction-oxidation desulfurization system with H5PMo10V2O40 as catalyst, polyethylene glycol-600 extracting agent, oxygen as oxidant.The experimental results show that DBT and 4, 6-DBT can be removed completely and the removal rate of BT was only 60% in the system of H5PMo10V2O40/CNTs as catalyst and oxygen as oxidant at the reaction time of 2 h, reaction temperature of 60?, initial oxygen partial pressure of 0.3 MPa, dosage catalyst of 0.1 g, solvent and oil ratio of 1:1. And there were little effect on removal of DBT for the addition of cycloparafin hydrocarbon and aromatic hydrocarbons. Meanwhile, the reaction mechanism of the system was explored.The super vanadium reactive oxygen species which was generated by the catalyst H5PMo10V2O40 with oxygen oxidized DBT to DBTO2. |
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