Mixing-assisted oxidative desulfurization of model sulfur compounds using polyoxometalate/H2O2 catalytic system

Mixing-assisted oxidative desulfurization of model sulfur compounds using polyoxometalate/H2O2 catalytic system

Type	Journal Article
Author	Angelo Earvin Sy Choi
Author	Susan Roces
URL	Free Full Text Source:  http://www.sciencedirect.com/science/article/pii/S2468203916300231
Volume	26
Issue	4
Pages	184-190
Publication	Sustainable Environment Research
Date	July 2016
Abstract	Desulfurization of fossil fuel derived oil is needed in order to comply with environmental regulations. Dibenzothiophene and benzothiophene are major sulfur compounds in raw diesel oil. Researchers conducted mixing-assisted oxidative desulfurization of dibenzothiophene and benzothiophene using polyoxometalate/H2O2 systems and a phase transfer agent. They studied the effects of reaction time and temperature in the oxidation of model sulfur compounds mixed in toluene. They employed a pseudo first-order reaction kinetic model and the Arrhenius equation to evaluate the kinetic rate constant and activation energy of each catalyst tested in the desulfurization process. Results revealed the order of catalytic activity and activation energy of the different polyoxometalate catalysts to be H3PW12O40 > H3PM12O40 > H4SiW12O40 for both dibenzothiophene and benzothiophene.