An alumina support was modified by fluorine via impregnation to investigate the effect of fluoride content on the reactivity of Ni–Mo/Al₂O₃ catalyst. The catalyst was characterized by X-ray diffraction, N₂ adsorption–desorption (Brunauer–Emmett–Teller) isotherms, temperature-programmed desorption of ammonia, X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy. Sulfur etherification performance of the catalyst was studied using a fixed-bed reactor. The results show that increasing fluoride content increases the pore volume and pore size but reduces the specific surface area. In addition, the degree of sulfidation of Ni first increases and then decreases. The amounts of strong acid and total acid also increase with increasing fluoride content. Performance evaluation of the catalyst reveals that the fluoride content has a minor effect on the thioetherification performance of the catalyst; however, an optimum fluoride content, which was determined to be 0.2%, can ensure lower olefin saturation and an efficient diene selective hydrogenation.

中文翻译：

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改性载体氟化物对Ni-Mo / Al 2 O 3硫醚化催化剂性能的影响

氧化铝通过浸渍对氟进行改性，以研究氟化物含量对Ni-Mo / Al ₂ O ₃催化剂反应性的影响。通过X射线衍射N ₂表征催化剂吸附-解吸（Brunauer-Emmett-Teller）等温线，程序升温的氨解吸，X射线光电子能谱和高分辨率透射电子显微镜。使用固定床反应器研究了催化剂的硫醚化性能。结果表明，增加氟化物含量会增加孔体积和孔径，但会降低比表面积。另外，Ni的硫化度首先增加然后减少。强酸和总酸的量也随着氟化物含量的增加而增加。催化剂的性能评估表明，氟化物含量对催化剂的硫醚化性能影响较小。但是，最佳氟化物含量被确定为0.2％，