NiMo-TiO2 Hydrodesulfurization Catalysts Prepared from Wet-Mixing-KneadingReportar como inadecuado




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A novel NiMo-TiO2 molding catalyst used for the hydrodesulfurization HDS was prepared by wet-mixing-kneading method, in which the amorphous titanic acid hydrate H2Ti2O5·nH2O and amorphous titanium compounds were used as the raw materials , the ammonium heptamolybdate NH46Mo7O24.4H2O and nickel nitrate hexahydrate NiNO32.6H2O were used as the active component solutions. The catalyst was well characterized by some techniques, such as X-ray diffraction XRD, N2 adsorption-desorption, and its HDS activity for dibenzothiophene was evaluated in a continuous-flow fixed-bed micro-reactor, compared with the NiMo-TiO2 catalyst prepared from impregnation method. The XRD results showed that the wet-mixing-kneading catalyst and impregnation catalyst are all pure anatase phase. The surface area of the wet-mixing-kneading catalyst is higher than that of impregnation catalyst. The results of dibenzothiophene hydrodesulfurization showed that the wet-mixing-kneading catalyst has higher activity than the impregnation catalyst.

KEYWORDS

wet-mixing-kneading method, hydrodesulfurization, NiMo-TiO2, dibenzothiophene

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Autor: Da-hua Huang, Shan-shan Chen, Li-cheng Li, Zhu-hong Yang, Xiao-hua Lu

Fuente: http://www.scirp.org/



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