Oxidation-extraction desulfurization of model oil over Zr-ZSM-5/SBA-15 and kinetic study
Chuanzhu LU , Hui FU , Huipeng LI , Hua ZHAO , Tianfeng CAI
Front. Chem. Sci. Eng. ›› 2014, Vol. 8 ›› Issue (2) : 203 -211.
Oxidation-extraction desulfurization of model oil over Zr-ZSM-5/SBA-15 and kinetic study
ZSM-5/SBA-15 composite molecular sieves were synthesized using post-synthesis method and characterized by X-ray diffraction and N2 adsorption-desorption. The oxidative-extration desulfurization of model oil was investigated by using hydrogen peroxide as the oxidant, tetrabutyl ammonium bromide as phase transfer catalyst, dimethyl sulfoxide as extractant, and Zr-ZSM-5/SBA-15, Ag-ZSM-5/SBA-15, Ce-ZSM-5/SBA-15 as catalyst. Under the optimal conditions, the desulfurization rate decreases in the order: Zr-ZSM-5/SBA-15>Ce-ZSM-5/SBA-15>Ag-ZSM-5/SBA-15. The highest desulfurization rate is 84.53% under the catalysis of Zr-ZSM-5/SBA-15. Kinetics analysis shows that the reaction is pseudo-first-order with the activation energy of 44.23 kJ/mol.
composite molecular sieve / oxidation desulfuration / extraction / kinetic
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Higher Education Press and Springer-Verlag Berlin Heidelberg
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