Abstract In this study, silica-supported Ni–Mo catalysts were prepared by co-loading Ni and Mo species on silica materials with different specific surface areas to investigate the effects of the supporting material's surface area on the physicochemical properties of the loaded metal species and the catalytic performance in the hydroconversion of methyl laurate. Notably, supporting materials with higher specific surface areas enabled the metal species to be highly dispersed to produce smaller metallic Ni crystallites, resulting in the formation of smaller metal particles consisting of Ni and Mo species. Moreover, in the hydroconversion of methyl laurate, all silica-supported Ni–Mo catalysts predominantly produced n -undecane followed by n -dodecane. In addition, the decrease in Ni crystallite size increased the number of active sites, thereby improving the catalytic activity in the hydroconversion of methyl laurate to hydrocarbons. In contrast, the product distribution was less sensitive to the Ni crystallite and metal particle sizes, suggesting that the reaction paths over the silica-supported Ni–Mo catalysts were only slightly sensitive to the morphology of the metal particles that served as active sites.

中文翻译：

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月桂酸甲酯在不同 Ni 尺寸的二氧化硅负载 Ni-Mo 催化剂上的加氢转化

摘要 本研究通过在不同比表面积的二氧化硅材料上共负载 Ni 和 Mo 物种来制备二氧化硅负载的 Ni-Mo 催化剂，以研究负载材料的表面积对负载金属物种和月桂酸甲酯加氢转化的催化性能。值得注意的是，具有更高比表面积的支撑材料使金属物种能够高度分散以产生更小的金属 Ni 微晶，从而形成由 Ni 和 Mo 物种组成的更小的金属颗粒。此外，在月桂酸甲酯的加氢转化中，所有二氧化硅负载的 Ni-Mo 催化剂主要产生正十一烷，然后是正十二烷。此外，Ni微晶尺寸的减小增加了活性位点的数量，从而提高月桂酸甲酯加氢转化为烃的催化活性。相比之下，产物分布对 Ni 微晶和金属颗粒尺寸不太敏感，这表明二氧​​化硅负载的 Ni-Mo 催化剂上的反应路径对作为活性位点的金属颗粒的形态仅略微敏感。