还原温度对双介孔钴基催化剂费-托合成性能的影响

通过等体积浸渍法制备了双介孔钴基催化剂，采用XRD、BET、SEM、H₂-TPR等手段考察了催化剂的性质，并研究了还原温度对催化剂结构及费托合成催化性能的影响。结果表明，随着还原温度的提高，催化剂活性位增加，活性增加，但增加到一定程度后活性降低，而甲烷选择性随着还原温度的提高逐渐增加，这是反应过程中催化剂表面存在的钴氧化物，使得水煤气反应变得活跃，烃产物移向低碳烃。

Effect of reduction temperature on performance of double mesoporous Co-based catalysts in Fischer-Tropsch synthesis

The double mesoporous Co-based catalysts were prepared by incipient-wetness impregnation method, which were characterized by the technology of XRD, BET, SEM and H₂-TPR. And the influences of reduction temperature on the structure and performance of the catalysts in Fischer-Tropsch were investigated. The result showed that with the increase of reduction temperature, the active sites of catalysts increased, and the activity increased. After the activity reached a certain level, it began to decline. And the methane selectivity increased with the increase of reduction temperature. The related reactive performance might be due to the cobalt oxides on the surface of catalysts formed in the reaction, which made the water gas shift reaction become active, and the hydrocarbon products moved to low hydrocarbons.