000			02168nab a2200205 4500
005			20260520000839.0
008			260224s2009 xxu
245	0	0	_aRemoval of dibenzothiophenes from fuels by oxy-desulfurization
260			_a _b _cnov./dic. 2009
270			_a09/06/2010 ; 09/06/2010
300			_a9 p. ; 5986-5994
520			_aTranscripción del resumen del autor. Removal of sulfur species from fuels is an increasingly critical environmental issue. Hydrodesulfurization (HDS) removes sulfur compounds, such as mercaptans and sulfides, from hydrocarbons; however, some sulfur-containing compounds are very difficult to remove and need deep desulfurization processes. In this study, another approach is explored, where dibenzothiophene can be removed from the HDS products by a liquid-phase process. Four different sulfur removal approaches are tested: oxidation, extraction, consecutive oxidation and extraction, and simultaneous oxidation and extraction. A detailed parametric experimental study was performed to select the best technique for the specified purpose of this investigation. n-Octane doped with dibenzothiophenes is used as a model fuel, which is extracted by polar solvents [N-methyl-2-pyrolidone (NMP), dimethyl formamide (DMF), and acetonitrile (ACN)]. These solvents are found to have a moderate capability of removing sulfur species. Applying oxidation in the liquid phase resulted in partial removal of the sulfur content, but most of the sulfur components are not removed from the fuel phase. However, applying both oxidation and extraction steps (either consecutively or simultaneously) resulted in dissolution of sulfur production in the solvent phase. NMP was found to be the best solvent (among the tested ones in this investigation) for the removal of oxidized sulfur species. This is related to the high capability of NMP (polar solvent) for the removal of oxidized (polar) sulfur species (sulfones).
581			_a6
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aAli, Sami H. _942394
100	1		_aHamad, Dina M. _942395
100	1		_aAlbusairi, Bader H. _942396
999			_c170843 _d170843