Deep Fuels Desulfurization and Denitrogenation Using 1-Butyl-3-methylimidazolium Trifluoromethanesulfonate

Abstract

The aim of this study is to investigate the possible use of 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([BMIM][OTf]) as solvent for three separation tasks which appear in deep desulfurization of fuels: {aromatic sulfur compound + aliphatic hydrocarbon}, {nitrogen compound + aliphatic hydrocarbon}, or {sulfur compound + aliphatic hydrocarbon}. New three ternary systems are studied to investigate the capacity and selectivity of [BMIM][OTf] for extraction of sulfur and nitrogen containing aromatic organic compounds from aliphatic hydrocarbons. Aromatic hydrocarbon capture, which often appears causing unwanted reduction of fuel octane number, is also investigated. Therefore, LLE measurements of ternary mixtures for three systems are presented: {thiophene + n-heptane + [BMIM][OTf]}, {pyridine + n-heptane + [BMIM][OTf]}, {benzene + n-heptane + [BMIM][OTf]}, and {thiophene + n-heptane + [BMIM][OTf]} at 298.15 K and atmospheric pressure. The liquid−liquid equilibrium (LLE) data are correlated by the use of the NRTL model. Moreover, the extraction experiments of synthetic fuelsmodel gasoline and model diesel using [BMIM][OTf]have been performed. The influence of three stepped extraction procedure using each time a fresh portion of [BMIM][OTf] on the final gasoline and diesel compositions is presented.

Rheological properties of {[bmim]PF6+methanol} mixtures at different temperatures, shear rates and compositions

“…These kinds of liquids can be used as extractor or good efficiency for the extraction of organic compounds and also are good oxidative agents [28][29][30][31]. The [bmim]PF 6 has proper structure as a good extractor.…”

Activity coefficients at infinite dilution and physicochemical properties for organic solutes and water in the ionic liquid 1-(2-hydroxyethyl)-3-methylimidazolium trifluorotris(perfluoroethyl)phosphate

“…Based on these results the gasliquid partition coefficients, K L , and basic thermodynamic functions such as partial molar excess Gibbs energy DG E;1 1 , enthalpies DH E;1 1 and entropies DS E;1 1 at infinite dilution were determined. Ionic liquids are considered as extractants in separation of sulfur compounds from fuels [1][2][3], therefore the selectivities and capacities at infinite dilution for alkanes/thiophene extraction problems were calculated and compared to other ILs based on the same [FAP] À anion [4][5][6][7][8][9]. Additionally results were compared to ionic liquid based on the same cation with bis(trifluoromethylsulfonyl)-amide, [NTf 2 ] À anion [10].…”

Theoretical study on interactions between Trifluoromethanesulfonate (Triflate) based ionic liquid and thiophene

“…However, due to the designable properties of ILs, different combinations of cations and anions will lead to numerous ILs [9], which make it time consuming and inconvenient to study all the mechanisms through experimentation. Therefore, theoretical quantum chemical research has been conducted to interpret the mechanism of ILs extraction [10].…”