Citation:
SONG Hua, ZHANG Fu-yong, SONG Hua-lin, DAI Min, WAN Xia, XU Xiao-wei. Preparation of supported nickel phosphide catalyst by solvothermal method and its hydrodesulfurization performance[J]. Journal of Fuel Chemistry and Technology,
;2015, 43(6): 714-719.
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The supported Ni2P/MCM-41 catalyst was prepared by a solvothermal method using triphenylphosphine (TPP) as a cheap phosphorus material and tri-n-octylamine (TOA) as the coordinating liquid reaction system. The catalysts were characterized by X-ray diffraction (XRD), N2-adsorption, CO uptake, X-ray photoelectronspectroscopy (XPS) and transmission electron microscopy (TEM). The solvothermal synthesis was performed at atmospheric pressure and 330 ℃, at least 300 ℃ lower than the temperature for preparing the corresponding catalysts by temperature-programmed reduction (H2-TPR) method. The structure and hydrodesulfurization (HDS) performance of the as-prepared Ni2P/MCM-41 catalyst are compared with those prepared by H2-TPR, with dibenzothiophene (DBT) as a model compound. The results showed that the solvothermal method can decrease the aggregation of P species on the catalyst surface so as to achieve a Ni2P catalyst with high surface area (690 m2/g) and then promote the formation of small and highly dispersed Ni2P active phase. The catalyst from solvothermal synthesis exhibits distinctly a superior HDS performance to that prepared by H2-TPR method. Under the conditions of 340 ℃, 3.0 MPa, a H2/oil volume ratio of 500(volume ratio), and a weight hourly space velocity (WHSV) of 2.0 h-1, the conversion of DBT reaches 96.8% over the catalyst from solvothermal synthesis, which is 10.6% higher than that over the catalyst prepared via H2-TPR.
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