Extractive Desulfurization of Liquid Fuel using Modified Pyrollidinium and Phosphonium Based Ionic Liquid Solvents
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In the pursuit of better solvents for use in the extractive desulfurization (EDS) of liquid fuel, the pyrollidinium and phosphonium based ionic liquids (ILs) have been improved by combining them with selected molecular compound modifiers. The modifiers, which are imidazole, poly(ethylene) glycol (PEG 200) and sulfolane were selected to induce previously nonexistent mechanisms in the presence of refractory sulfur compounds. The addition of PEG 200 and sulfolane were observed to have a more positive impact on the performance of the ILs than the addition of imidazole under the same conditions. This provides further support for the idea that π–π interaction may not be the predominant interactions for the ILs that are the highly effective in EDS. Using the sulfolane modified tetrabutylphosphonium methanesulfonate [P4444][MeSO3], up to 81% dibenzothiophene (DBT) removal was recorded at a temperature of 30 °C and solvent-to-mass ratio of 1:1 and after a 30 min mixing time.
KeywordsIonic liquid Thiophene Benzothiophene Diesel Phosphonium Pyrollidinium Hexadecane Sulfolane
The authors appreciate the financial support of The Research Council and Sultan Qaboos University, Muscat Oman, under the Project RC/ENG/PCED/12/02.
- 1.Worldwide Winter Diesel Fuel Quality Survey. Infinium (2014)Google Scholar
- 15.Ahmed, O.U., Mjalli, F.S., Al-Wahaibi, T., Al-Wahaibi, Y., AlNashef, I.M.: Optimum performance of extractive desulfurization of liquid fuels using phosphonium and pyrrolidinium-based ionic liquids. Ind. Eng. Chem. Res. 54, 6540–6550 (2015). https://doi.org/10.1021/acs.iecr.5b01187 CrossRefGoogle Scholar