科研之友
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摘要
Designing a catalyst with excellent recyclability to improve oxidative desulfurization continues to challenge many researchers. In this study, a H4SiMo12O40@SiO2 catalyst with a core-shell structure was successfully prepared and applied to desulfurize a model oil. Various characterization methods demonstrated that the synthesized H4SiMo12O40@SiO2 catalyst presents a hollow spherical structure and that the active H4SiMo12O40 species is incorporated into the mesoporous SiO2 shell. Under optimal reaction conditions, the desulfurization rate of dibenzothiophene is nearly 100%, and the activation energy of the oxidation reaction of dibenzothiophene is 22.08 kJ mol(-1). These results reveal the excellent catalytic activity of H4SiMo12O40@SiO2 for oxidative desulfurization. The catalyst can be recycled by up to 13 times without significant reductions in catalytic activity; such enhanced recyclability may be attributed to the core-shell structure of the synthesized catalyst.
- 出版日期2015
- 单位石河子大学
