A Mn(III) polyoxotungstate in the oxidation of organosulfur compounds by H2O2 at room temperature: an environmentally safe catalytic approach
authors Duarte, TAG; Pires, SMG; Santos, ICMS; Simoes, MMQ; Neves, MGPMS; Cavaleiro, AMV; Cavaleiro, JAS
nationality International
journal CATALYSIS SCIENCE & TECHNOLOGY
keywords METAL-SUBSTITUTED POLYOXOTUNGSTATES; POLYOXOMETALATE-BASED MATERIALS; HYDROGEN-PEROXIDE; FUEL-OIL; DESULFURIZATION PROCESS; DEEP DESULFURIZATION; PHOSPHOTUNGSTIC ACID; ORGANIC FRAMEWORK; MODEL DIESEL; LIQUID FUELS
abstract The tetrabutylammonium (TBA) salt of a Keggin-type polyoxometalate (POM), with the chemical formula TBA(4)H(2)[BW11Mn(H2O)O-39]center dot H2O, TBABW(11)Mn, was evaluated as a catalyst in the oxidation by hydrogen peroxide of several organosulfur compounds, namely benzothiophene (BT), 2-methylbenzothiophene (2-MBT), 3-methylbenzothiophene (3-MBT), dibenzothiophene (DBT), 4-methyldibenzothiophene (4-MDBT) and 4,6-diethyldibenzothiophene (4,6-DEDBT), in acetonitrile at room temperature. All compounds were oxidized to their corresponding sulfones with high conversion and selectivity. Following the excellent results achieved, the BW11Mn/H2O2 in CH3CN system was tested in the oxidation of model fuels (MFs) consisting of a mixture of BTs and DBTs in hexane (MF1 containing mainly BTs and MF2 containing predominantly DBTs). In both cases, the organosulfur compounds from the model fuels were fully converted into their corresponding sulfones. Envisaging the development of a promising desulfurization procedure, the extraction of sulfur compounds from MF2 was attempted after the catalytic oxidation process. More than 98 mol% was removed using an ethanol/H2O mixture.
publisher ROYAL SOC CHEMISTRY
issn 2044-4753
year published 2016
volume 6
issue 9
beginning page 3271
ending page 3278
digital object identifier (doi) 10.1039/c5cy01564b
web of science category Chemistry, Physical
subject category Chemistry
unique article identifier WOS:000375545600043
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 5.721
5 year journal impact factor 5.863
category normalized journal impact factor percentile 74.528
dimensions (citation analysis):
altmetrics (social interaction):



 


Apoio

1suponsers_list_ciceco.jpg