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Synthesis, characterization, and application of 1-butyl-3-methylimidazolium thiocyanate for extractive desulfurization of liquid fuel

  • Pollution control technologies and alternate energy options
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Abstract

1-Butyl-3-methylimidazolium thiocyanate [BMIM]SCN has been presented on extractive desulfurization of liquid fuel. The FTIR, 1H-NMR, and C-NMR have been discussed for the molecular confirmation of synthesized [BMIM]SCN. Further, thermal, conductivity, moisture content, viscosity, and solubility analyses of [BMIM]SCN were carried out. The effects of time, temperature, sulfur compounds, ultrasonication, and recycling of [BMIM]SCN on removal of dibenzothiophene from liquid fuel were also investigated. In extractive desulfurization, removal of dibenzothiophene in n-dodecane was 86.5 % for mass ratio of 1:1 in 30 min at 30 °C under the mild process conditions. [BMIM]SCN could be reused five times without a significant decrease in activity. Also, in the desulfurization of real fuels, multistage extraction was examined. The data and results provided in the present paper explore the significant insights of imidazolium-based ionic liquids as novel extractant for extractive desulfurization of liquid fuels.

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Abbreviations

[BMIM]SCN:

1-Butyl-3-methylimidazolium thiocyanate

IL:

Ionic liquids

DBT:

Dibenzothiophene

TS:

Thiophene

BT:

Benzothiophene

3-MT:

3-Methythiophene

4-MDBT:

4-Methyldibenzothiophene

4,6-DMDBT:

4 6-Dimethyldibenzothiophene

EDS:

Extractive desulfurization system

HDS:

Hydrodesulphurization system

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Acknowledgments

The authors gratefully acknowledge the financial support by the Council of Scientific Industrial Research (CSIR), grant number (22(0492)/09/EMR-II), and the Government of India (principal investigator: Dr. Kailas L. Wasewar).

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Authors and Affiliations

  1. Department of Chemical Engineering, Priyadarshini Institute of Engineering and Technology, Nagpur (M.S), 440016, India

    Swapnil A. Dharaskar

  2. Advance Separation and Analytical Laboratory, Department of Chemical Engineering, Visvesvaraya National Institute of Technology (VNIT), Nagpur (M.S), 440010, India

    Kailas L. Wasewar, Mahesh N. Varma & Diwakar Z. Shende

Authors
  1. Swapnil A. Dharaskar
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  2. Kailas L. Wasewar
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  3. Mahesh N. Varma
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  4. Diwakar Z. Shende
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Corresponding author

Correspondence to Swapnil A. Dharaskar.

Additional information

Responsible editor: Santiago V. Luis

Highlights

• [BMIM]SCN was synthesized and employed as extractant for S-removal.

• DBT containing model fuel in [BMIM]SCN could reach 86.5 % of S-removal with mass ratio 1:1 at 30 °C in 30 min., which was the remarkable enrichment of EDS process over HDS.

• [BMIM]SCN could be reused without regeneration more than five times with a slight decrease in activity.

• The EDS process could be an option for environmentally benign method for deep desulfurization.

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Dharaskar, S.A., Wasewar, K.L., Varma, M.N. et al. Synthesis, characterization, and application of 1-butyl-3-methylimidazolium thiocyanate for extractive desulfurization of liquid fuel. Environ Sci Pollut Res 23, 9284–9294 (2016). https://doi.org/10.1007/s11356-015-4945-1

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  • DOI: https://doi.org/10.1007/s11356-015-4945-1

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