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Heterogeneous titanium catalysts for oxidation of dibenzothiophene in hydrocarbon solutions with hydrogen peroxide: On the road to oxidative desulfurization

Paper ID Volume ID Publish Year Pages File Format Full-Text
45288 46407 2016 7 PDF Available
Title
Heterogeneous titanium catalysts for oxidation of dibenzothiophene in hydrocarbon solutions with hydrogen peroxide: On the road to oxidative desulfurization
Abstract

•Sulfides in hydrocarbon solution are oxidized with aqueous hydrogen peroxide.•Titanium grafted on hydrophobic silica catalyzes the oxidation.•No co-solvent or surfactant is required.•The method is compatible with the use of industrial grade solvent.

Titanium centers grafted on hydrophobic silica bearing long chain silanes (octadecyl or octyl) are able to oxidize dibenzothiophene (DBT), as well as simpler sulfides and 2,6-dimethyldibenzothiophene, to the corresponding sulfone in hydrocarbon solution with aqueous hydrogen peroxide in only a slight excess over the stoichiometric amount, without using any surfactant or cosolvent. The productivity per gram of catalyst or per Ti site can be optimized by tuning the silanization of the silica (or using a commercially available silanized silica) and the Ti loading of the catalyst. The catalyst preparation and the oxidation reaction are compatible with the use of an industrial grade aromatic solvent.

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Keywords
Sulfide oxidation; Titanium; Hydrophobicity; Hydrogen peroxide; Oxidative desulfurization
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Heterogeneous titanium catalysts for oxidation of dibenzothiophene in hydrocarbon solutions with hydrogen peroxide: On the road to oxidative desulfurization
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 180, January 2016, Pages 680–686
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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