Two hexacyanof
errate-based
erm6">ionic liquids, [C
4Py]
3Fe(CN)
6 and [C
16Py]
3Fe(CN)
6, w
ere synthesized and charact
erized using Fouri
er transform infrared and mass spectroscopies and CHN analysis. They w
ere employed as Fenton-like catalysts in extraction and catalytic oxidative
erm4">desulfurization of model oil with
er" xmlns:mml="http://www.w3.org/1998/Math/MathML" id="aoc3500-eo-2000">erm2 TH_term3">dibenzothiophene (DBT),
er" xmlns:mml="http://www.w3.org/1998/Math/MathML" id="aoc3500-eo-2001">erm3">benzothiophene (BT),
er" xmlns:mml="http://www.w3.org/1998/Math/MathML" id="aoc3500-eo-2002">erm3">4,6-dimethyldibenzothiophene (4,6-DMDBT),
er" xmlns:mml="http://www.w3.org/1998/Math/MathML" id="aoc3500-eo-2003">erm3">4-methyldibenzothiophene (4-MDBT) and
er" xmlns:mml="http://www.w3.org/1998/Math/MathML" id="aoc3500-eo-2004">erm3">3-methylbenzothiophene (3-MBT) as substrates. Various polar solvents, such as
erm6">ionic liquids, wat
er and organic solvents, w
ere applied to choose a suitable extractant. The results showed the removal of DBT reached 97.1% with [C
4Py]
3Fe(CN)
6 as a catalyst and
er" xmlns:mml="http://www.w3.org/1998/Math/MathML" id="aoc3500-eo-2005">erm3">1-n-octyl-3-methylimidazolium hexafluorophosphate ([C
8mim]PF
6) as an extractant und
er optimal conditions. The activity of
erm6">sulfur removal followed the ord
er DBT > 3-MBT > BT > 4-MDBT >4,6-DMDBT. The effect of wat
er content on
erm6">sulfur removal was investigated by adding various concentrations of H
2O
2. It was found that excess wat
er had a positive effect on
erm6">sulfur removal but the catalysts w
ere less sensitive than [FeCl
4−]-based catalysts to wat
er. The mechanism was studied using electron spin-resonance spectroscopy and gas chromatography–mass spectrometry. O
2•− may be the active oxygen species in the catalytic oxidative
erm4">desulfurization process and the oxidation products of various
erm6">sulfur compounds w
ere the corresponding sulfoxides and sulfones. Copyright