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首页> 外文期刊>Journal of Materials Research >Effect of the SiO_2 support morphology on the hydrodesulfurization performance of NiMo catalysts
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Effect of the SiO_2 support morphology on the hydrodesulfurization performance of NiMo catalysts

机译：SiO_2载体形态对NiMo催化剂加氢脱硫性能的影响。

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摘要

To study the effects of the support morphology on the hydrodesulfurization (HDS) activity of NiMoS catalysts, ordered mesoporous SiO2 (KIT-6) and nonporous nanospheres of SiO2 were used as supports. Metal species (Ni and Mo) were incorporated through a sequential impregnation technique. The aqueous solution of nickel nitrate was introduced first on the supports, followed by the solution of ammonium molybdate. Subsequently, a sulfidation treatment was carried out in gaseous H2S/H-2 atmosphere. The NiMo/Al2O3 commercial catalyst was used as reference. The materials obtained were characterized by N-2 physisorption, X-ray diffraction (XRD), and high-resolution transmission electron microscopy (HRTEM) and evaluated in the HDS catalytic reaction of dibenzothiophene in a batch reactor. The results indicate that the textural properties of KIT-6 were the key factors to obtain disperse NiMoS stacks, and a better metal sulfidation, which lead to a higher catalytic activity of the NiMo/KIT-6 catalyst (twice as active) compared to the NiMo/Nanosilica catalyst. In addition, the activity of the NiMo/KIT-6 catalyst was also superior to that obtained for the commercial catalyst.
机译：为了研究载体形态对NiMoS催化剂的加氢脱硫（HDS）活性的影响，使用有序介孔SiO2（KIT-6）和无孔SiO2纳米球作为载体。通过顺序浸渍技术掺入金属物质（Ni和Mo）。首先将硝酸镍水溶液引入载体上，然后引入钼酸铵溶液。随后，在气态H 2 S / H-2气氛中进行硫化处理。 NiMo / Al2O3商业催化剂用作参考。所得材料通过N-2物理吸附，X射线衍射（XRD）和高分辨率透射电子显微镜（HRTEM）进行表征，并在间歇反应器中的二苯并噻吩的HDS催化反应中进行评估。结果表明，KIT-6的织构特性是获得分散NiMoS烟囱的关键因素，并且金属硫化效果更好，这导致NiMo / KIT-6催化剂的催化活性（是活性的两倍）更高。 NiMo /纳米二氧化硅催化剂。另外，NiMo / KIT-6催化剂的活性也优于商业催化剂获得的活性。

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