The Extractive Desulfurization of Fuels Using Ionic Liquids Based on FeCl₃

Y. Wang College of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, P.R. China

H. Li College of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, P.R. China; State Key Laboratory of Combustion, Huazhong University of Science and Technology, Wuhan, P.R. China

W. Zhu College of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, P.R. China

X. Jiang College of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, P.R. China

L. He College of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, P.R. China

J. Lu State Key Laboratory of Combustion, Huazhong University of Science and Technology, Wuhan, P.R. China

Y. Yan College of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, P.R. China

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Abstract

Six Lewis acid ionic liquids were synthesized and employed as extractants for desulfurization of the model oil containing dibenzothiophene (DBT). Very promising ionic liquid was 1-butyl-3-methylimidazolium chloride-FeCl3 ([bmim]Cl/FeCl3), which performed best in the studied ionic liquids under the same operating conditions. It can remove DBT from model oil after continuous extraction for four steps, and the desulfurization efficiency can reach 97.9% under mild reaction conditions. Other sulfur-containing compounds were also investigated. The used ionic liquid could be regenerated six times without a significant decrease in activity.

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Notes

^aThe melting point of T₄Cl/FeCl₃ is higher; therefore, operating temperature was 70°C.

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The Extractive Desulfurization of Fuels Using Ionic Liquids Based on FeCl3

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The Extractive Desulfurization of Fuels Using Ionic Liquids Based on FeCl₃