锰是铁基费托合成催化剂的常用助剂，其引入方式是影响催化剂性能的重要因素。以Mn-Fe普鲁士蓝类似物为前驱体，经简单焙烧制备了核壳型Mn-FeC_x@C催化剂，通过考察助剂锰质量分数对催化剂结构性质及催化性能的影响，研究锰质量分数对催化剂结构变化规律和催化剂构效关系的影响。结果表明，锰的引入改变了催化剂FeC_x活性相的生成和表面性质，并在一定程度上降低了催化剂活性，增加了产物低碳烃的烯烷比，当锰质量分数为2%时，低碳产物烯烷比可达4.8。锰的引入对催化剂FeC_x活性相结构的影响是引起反应性能变化的主要原因。

Manganese is a commonly used promoter for iron-based Fischer-Tropsch synthesis catalyst, and its adding mode is an important factor affecting the performance of the catalyst.Mn-FeC_x@C catalyst with a core-shell structure is prepared through simple calcination with Mn-Fe prussian blue analogue as precursor.The influence of manganese content on the structure and catalytic performance of the catalyst is studied.It is indicated that the addition of manganese has changed the formation and surface properties of FeC_x active phase, reduced the activity of catalyst to a certain extent and increased the olefin-alkane ratio of lower hydrocarbons.The olefin-alkane ratio in lower hydrocarbons can reach 4.8 when manganese content is 2%.The effect of manganese on the active phase structure of catalyst FeC_x may be the main reason for the change of reaction performance.

郭祥贺(1993-),男,硕士研究生,研究方向为费托合成催化剂的制备及应用,2532002267@qq.com