科研之友
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摘要
In this paper,the oxidative desulfurization（ODS）system is directly applied to deal with the catalytic oxidation of sulfur compounds of sulfur-containing model oil by dielectric barrier discharge（DBD）plasma in the presence of air plus an extraction step with the oxidation-treated fuel put over ionic liquid[BMIM]FeCl4（1-butyl-3-methylimidazolium tetrachloroferrate）.This new system exhibited an excellent desulfurization effect.The sulfur content of DBT in diesel oil decreased from 200 ppm to 4.92 ppm（S removal rate up to 97.5%）under the following optimal reaction conditions:air flow rate（v）of 60 mL/min,amplitude of applied voltage（U）on DBD of 16 kV,input frequency（f）of 79 kHz,catalyst amount（ω）of 1.25 wt%,reaction time（t）of10 min.Moreover,a high desulfurization rate was obtained during oxidation of benzothiophene（BT）or 4,6-DMDBT（4,6-dimethyl-dibenzothiophene）under the aforementioned conditions.The oxidation reactivity of different S compounds was decreased in the order of DBT,4,6-DMDBT and BT.The remarkable advantage of the novel ODS system is that the desulfurization condition applies in the presence of air at ambient conditions without peroxides,aqueous solvent or biphasic oil-aqueous solution system.
- 出版日期2013-12-15
- 单位石河子大学
