Title: Oxidative desulfurization of diesel oil over Ti-MWW catalyst with TBHP as oxidant
Abstract: Oxidative desulfurization(ODS) of benzothiophene(BT),dibenzothiophene(DBT) and 4,6-dimethyl dibenzothiophene(DMDBT) in model light oil was investigated with different oxidants over Ti-MWW catalyst.The results indicated that tert-butyl hydroperoxide(TBHP) exhibits higher reactivity with these organic sulfur-containing compounds than hydogen peroxide.In the presence of TBHP,the reactivity of these sulfur-containing compounds over Ti-MWW catalyst is in the order of DBT DMDBT BT,which is determined by the electron density of sulfur atom in thiophene ring as well as the steric hindrance of sulfur compounds.ODS of a commercial diesel oil was also investigated over the Ti-MWW/TBHP system.The sulfur compounds in the commercial diesel oil can be efficiently oxidized to corresponding sulfone under mild reaction conditions;by oxidation and extraction twice,the sulfur content in the commercial diesel oil is decreased from 1 015 μg/mL to 11 μg/ mL and the sulfur removal reaches 99%.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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