|
authors |
Juliao, D; Gomes, AC; Pillinger, M; Valenca, R; Ribeiro, JC; Goncalves, IS; Balula, SS |
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nationality |
International |
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journal |
APPLIED CATALYSIS B-ENVIRONMENTAL |
|
author keywords |
Oxidative desulfurization; Extraction; Ionic liquid; Hydrogen peroxide; Cyclopentadienyl molybdenum complexes |
|
keywords |
TEMPERATURE IONIC LIQUIDS; OXIDATIVE DESULFURIZATION; ROOM-TEMPERATURE; HYDROGEN-PEROXIDE; DEEP DESULFURIZATION; OLEFIN EPOXIDATION; MOLECULAR-OXYGEN; METAL CATALYSIS; MODEL DIESEL; SELECTIVE OXIDATION |
|
abstract |
Efficient and recyclable liquid-liquid extraction and catalytic oxidative desulfurization (ECODS) systems for the removal of refractory sulfur compounds from liquid fuels are reported that use the cyclopentadienyl molybdenum tricarbonyl complexes [CpMo(CO)(3)Me] (1), [CpMo(CO)(3)(CH2-PC6H4-CO2Me] (2) and [CpMo(CO)(3)CH2COOH] (3) as catalyst precursors. An ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate, was used as both extractant and reaction medium, entrapping the active homogeneous Mo-VI catalysts that are formed in situ under the operating catalytic conditions (aqueous H2O2 as oxidant, 50 degrees C). The high sulfoxidation activity of the catalyst formed from 1 was largely responsible for enabling > 99% desulfurization within 1 h of a model oil containing 1-benzothiophene, dibenzothiophene, 4-methyldibenzothiophene and 4,6-dimethyldibenzothiophene (2000 ppm S). The IL/catalyst phase could be repeatedly recycled with no loss of desulfurization efficiency. By sequentially performing extractive desulfurization and ECODS steps, 83-84% sulfur removal was achieved for untreated real diesel and jet fuel samples with initial sulfur contents of ca. 2300 and 1100 ppm, respectively. |
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publisher |
ELSEVIER SCIENCE BV |
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issn |
0926-3373 |
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year published |
2018 |
|
volume |
230 |
|
beginning page |
177 |
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ending page |
183 |
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digital object identifier (doi) |
10.1016/j.apcatb.2018.02.036 |
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web of science category |
Chemistry, Physical; Engineering, Environmental; Engineering, Chemical |
|
subject category |
Chemistry; Engineering |
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unique article identifier |
WOS:000429500100018
|
