Experimental study on desulfurization by ionic liquids/H<sub>2</sub>O<sub>2</sub> system

LI Mei; SUN Gong-cheng; CHENG Xue-yun; LI Jia-jia; JIN Quan; XU Rong-sheng

Volume 47 Issue 9

Sep. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(9): 1042-1052

LI Mei, SUN Gong-cheng, CHENG Xue-yun, LI Jia-jia, JIN Quan, XU Rong-sheng. Experimental study on desulfurization by ionic liquids/H2O2 system[J]. Journal of Fuel Chemistry and Technology, 2019, 47(9): 1042-1052.

Citation:

LI Mei, SUN Gong-cheng, CHENG Xue-yun, LI Jia-jia, JIN Quan, XU Rong-sheng. Experimental study on desulfurization by ionic liquids/H₂O₂ system[J]. Journal of Fuel Chemistry and Technology, 2019, 47(9): 1042-1052.

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Experimental study on desulfurization by ionic liquids/H₂O₂ system

1.
School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan 750021, China
2.
Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan 750021, China
3.
Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan 750021, China

Funds:

the National Natural Science Foundation of China 21666001

North Minzu University-Level Scientific Research Project 2017HG04

North Minzu University-Level Major Project ZDZX201803

North Minzu University Research Platform Project 201707

More Information

Corresponding author: LI Mei, Tel: 15009663719, E-mail: echolimei@126.com
Received Date: 2019-05-20
Rev Recd Date: 2019-07-08

Available Online: 2021-01-23

Publish Date: 2019-09-10

Abstract

Abstract

Four different kinds of ionic liquids(ILs), namely, 1-butyl-3-methylimidazolium bromide([Bmim]Br), 1-butyl-3-methylimidazolium tetrafluoroborate([Bmim]BF₄), 1-butyl-3-methylimidazolium hydro-sulfate([Bmim]HSO₄), and 1-butyl-3-methylimidazolium dihydrophosphate([Bmim]H₂PO₄) were selected to add to the H₂O₂ solution (30%), respectively, to obtain four mixed solutions. Then, two kinds of deashed high-sulfur coal (LS, QX) desulfurization experiments were tested with above mixed solutions under mild conditions, respectively. The contents of different sulfur forms in coal samples before and after desulfurization were determined by wet chemical method, and the coal samples before and after desulfurization were characterized using Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), and thermogravimetric (TG). The results show that the addition of ionic liquids can make the H₂O₂ oxidation desulfurization ability enhance, and pyrite sulfur and organic sulfide sulfur in coal are obviously removed. After treated by the ILs/H₂O₂ system, the small size particle decreases, the space among the particles increases, and the pits on the coal surface become obvious. Moreover, the thermogravimetric test results show that the total weight loss of the coal sample treated by the ILs/H₂O₂ system increases and the peak temperature of some volatile substances lowers.
- ionic liquids,
- desulfurization,
- sulfur forms,
- pyrolysis characteristics

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References(23)

References

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