Abstract

It is shown that the Fischer–Tropsch synthesis in the presence of Co–xMn/SiO₂ cobalt catalysts with a manganese content of 0.5–2 wt % is characterized by high activity and C₅₊ hydrocarbon selectivity. The optimum concentration of manganese as a promoter is 1 wt %. The influence of manganese on the state of the surface of the catalysts in oxide and reduced forms is studied by a number of physicochemical methods. The formation of solid solutions of cobalt and manganese oxides of the xCo₃O₄–(1−x)Mn₃O₄ type is confirmed. The relationship between the promoting effect of manganese and the structure of active sites and the character of adsorption of H₂ and CO on the surface of the catalysts is ascertained.

中文翻译：

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锰对费-托钴催化剂的催化性能和活性表面结构的影响

摘要

结果表明，在锰含量为0.5–2 wt％的Co– x Mn / SiO ₂钴催化剂存在下，费-托合成具有高活性和C ₅₊烃选择性的特征。作为促进剂的锰的最佳浓度为1重量％。通过多种物理化学方法研究了锰对氧化物和还原形式催化剂表面状态的影响。x Co ₃ O ₄ –（1- x）Mn ₃ O ₄的钴和锰氧化物的固溶体的形成类型已确认。确定了锰的促进作用与活性位点的结构与催化剂表面上H ₂和CO的吸附特性之间的关系。