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Highly Efficient Oxidative Desulfurization of Fuels by Lewis Acidic Ionic Liquids Based on Iron Chloride
Author(s) -
Dong Y.,
Nie Y.,
Zhou Q.
Publication year - 2013
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201200570
Subject(s) - dibenzothiophene , chemistry , flue gas desulfurization , benzothiophene , ionic liquid , sulfur , catalysis , lewis acids and bases , inorganic chemistry , hydrogen peroxide , chloride , hydrodesulfurization , organic chemistry , nuclear chemistry , thiophene
Acidic ionic liquids (ILs) have been employed as extractant and catalyst in the oxidative desulfurization (ODS) process of fuels in recent years. Several Lewis acidic ionic liquids [C 6 3 MPy]Cl/ n FeCl 3 (molar fraction n = 0.5, 1, 2, 3) and [C 6 MIM]Cl/FeCl 3 were prepared and used to remove the aromatic sulfur compounds dibenzothiophene and benzothiophene from fuels. In the ODS process, the used ILs acted as both extractant and catalyst with 30 wt % hydrogen peroxide aqueous solution as oxidant. The effects of Lewis acidity of ILs, IL's cation structure, molar ratio of O/S, reaction temperature, and different sulfur compounds on the sulfur removal of model oil were investigated. The results indicated that the sulfur removal for dibenzothiophene was affected by Lewis acidity of ILs and nearly reached 100 % by [C 6 3 MPy]Cl/FeCl 3 at conditions of 298 K, IL/oil mass ratio of 1/3, O/S molar ratio of 4/1, in 20 min. The sulfur removal of real gasoline reached 99.7 % after seven ODS runs in the [C 6 3 MPy]Cl/FeCl 3 ‐H 2 O 2 system.