Four identically-prepared 20 wt% cobalt/0.15 wt% ruthenium Fischer-Tropsch catalysts, supported on different aluminas, were synthesized by incipient wetness impregnation, characterized, and compared based on their performance under standard Fischer-Tropsch synthesis conditions. Three alumina supports were obtained from commercial sources (Sasol, St. Gobain, and Alfa Aesar), while the fourth was made using a published technique that included 5 wt% silica. The silica-stabilized alumina catalyst produced superior Fischer-Tropsch rates of 49 mmol CO/g_cat h, compared to the other catalysts on the commercial supports with rates of 26–39 mmol CO/g_cat h. The improved performance of the silica-stabilized alumina support compared to the commercially available aluminas is ascribed to a bimodal pore structure with larger average diameters and enhanced thermal stability. The support can be thermally treated to higher temperatures (e.g., 1100 °C) without transformation into α-alumina, allowing dehydroxylation of the surface prior to impregnation to stabilize a nearly ideal dispersion of cobalt crystallites.

通过初期湿润浸渍法合成了四种负载相同的20重量％钴/0.15重量％钌费-托钌催化剂，并通过湿法浸渍对其进行了表征和表征，并根据它们在标准费托合成条件下的性能进行了比较。从商业来源（Sasol，St。Gobain和Alfa Aesar）获得了三种氧化铝载体，而第四种是使用包含5 wt％二氧化硅的公开技术制备的。二氧化硅稳定的氧化铝催化剂产生的费-托费率高达49 mmol CO / g _cat  h，而商业载体上的其他催化剂的费-托速率为26–39 mmol CO / g _cat h H。与可商购的氧化铝相比，二氧化硅稳定的氧化铝载体的性能改善归因于具有更大的平均直径和增强的热稳定性的双峰孔结构。可以将载体热处理至更高的温度（例如1100°C）而不会转变为α-氧化铝，从而在浸渍之前允许表面脱羟基化，以稳定几乎理想的钴微晶分散体。