Abstract In this work, two series of trimetallic NiMoW sulfide catalysts supported on Al–Mg(x) and Ti–Mg(x) mixed oxides with different content of MgO (x = 5, 10, 15 and 20 wt.% of MgO) were synthesized. The mixed oxides and catalysts were characterized by X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, N2 physisorption and Diffuse reflectance spectroscopy (DRS UV–Vis); and evaluated during the hydrodesulfurization (HDS) of dibenzothiophene (DBT) reaction. The NiMoW/Al–Mg catalysts showed a higher dispersion of Ni, Mo and W species than NiMoW/Ti–Mg catalysts resulting in higher catalytic activities. Catalysts with 10 wt.% of MgO showed the highest catalytic activity for both series of catalysts. Most of the synthesized catalysts exhibited higher activities than NiMoWS/Al–Ti reference catalyst. The present comparison study clearly showed that NiMoW/Al–Mg and NiMoW/Ti–Mg catalyst with 10 wt.% of MgO might be a promising and effective catalyst for the HDS-DBT reaction.

中文翻译：

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使用负载在 Al-Mg 和 Ti-Mg 混合氧化物上的 NiMoWS 催化剂对二苯并噻吩进行加氢脱硫

摘要 在这项工作中，两个系列的三金属 NiMoW 硫化物催化剂负载在具有不同 MgO 含量（x = 5、10、15 和 20 wt.% MgO）的 Al-Mg(x) 和 Ti-Mg(x) 混合氧化物上被合成。混合氧化物和催化剂通过 X 射线衍射 (XRD)、傅里叶变换红外 (FT-IR) 光谱、N2 物理吸附和漫反射光谱 (DRS UV-Vis) 进行表征；并在二苯并噻吩 (DBT) 反应的加氢脱硫 (HDS) 过程中进行评估。NiMoW/Al-Mg 催化剂表现出比 NiMoW/Ti-Mg 催化剂更高的 Ni、Mo 和 W 物质的分散性，从而导致更高的催化活性。含有 10 wt.% MgO 的催化剂对这两个系列的催化剂都表现出最高的催化活性。大多数合成的催化剂表现出比 NiMoWS/Al-Ti 参考催化剂更高的活性。