Abstract Mo improved Ni/Al2O3 catalysts were prepared and characterized, which demonstrated good catalytic performance for thioetherification process of FCC gasoline. The physico-chemical properties of the Ni/Al2O3 catalysts with different amounts of Mo were characterized by physical techniques and were correlated with their catalytic performance. Experimental results showed that bimetal (Mo and Ni) based catalysts displayed superior catalytic performance than mono-metal (Ni) based catalysts. Addition of Mo to Ni catalysts could inhibit the formation of NiAl2O4 crystallites and facilitate the formation of active precursor NiMoO4, contributing to the formation of more active sites during the presulfidation process. The micro-morphology of active species was restructured and the needle-stacks of Ni-Mo-S were observed on the Mo improved catalysts. These structures and properties had important influence on the thioetherification. By optimizing the Mo/Ni atomic ratio, the catalysts with a Mo/Ni atomic ratio of 0.3 had suitable micro-morphologies and properties, exhibiting the best catalytic performance and selectivity for thioetherification.

中文翻译：

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Mo改进的Ni/Al2O3硫醚化催化剂的活性相和反应性能

摘要 制备并表征了Mo改进的Ni/Al2O3催化剂，对FCC汽油的硫醚化过程具有良好的催化性能。不同Mo含量的Ni/Al2O3催化剂的理化性质通过物理技术表征，并与其催化性能相关。实验结果表明，双金属（Mo和Ni）基催化剂比单金属（Ni）基催化剂表现出更好的催化性能。在 Ni 催化剂中加入 Mo 可以抑制 NiAl2O4 微晶的形成并促进活性前驱体 NiMoO4 的形成，有助于在预硫化过程中形成更多的活性位点。活性物质的微观形貌被重构，并且在 Mo 改进的催化剂上观察到 Ni-Mo-S 的针状堆叠。这些结构和性质对硫醚化有重要影响。通过优化Mo/Ni原子比，Mo/Ni原子比为0.3的催化剂具有合适的微观形貌和性能，表现出最佳的硫醚化催化性能和选择性。