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在浆态床反应器中考察了未还原催化剂以及在240℃和270℃的还原温度下还原时间对Fe/Cu/K/SiO2催化剂F-T合成反应性能的影响,采用M ssbauer谱研究了还原和反应后催化剂的物相组成。结果表明,在240℃延长还原时间或将还原温度升高到270℃均有利于催化剂的还原,270℃还原的催化剂的活性和稳定性明显高于未还原和240℃还原的催化剂,催化剂的运行稳定性与催化剂在反应过程中的流失量有密切关系。催化剂高温还原时烃产物分布倾向于生成低碳数的烃类,在相同的还原温度下,烃产物选择性随还原时间的延长向轻组分方向偏移。
The effect of the reduction catalyst on the FT synthesis reaction performance of Fe / Cu / K / SiO2 catalyst was investigated in a slurry reactor and the reduction time at 240 ℃ and the reduction temperature of 270 ℃. The reduction and reaction were studied by M ssbauer spectroscopy The post-catalyst phase composition. The results show that prolonging the reduction time at 240 ℃ or increasing the reduction temperature to 270 ℃ are favorable for the reduction of the catalyst. The activity and stability of the catalyst reduced at 270 ℃ are obviously higher than that of the catalyst without reduction and reduction at 240 ℃. Stability and catalyst loss in the reaction process is closely related. The hydrocarbon product distribution tends to generate low-carbon hydrocarbons when the catalyst is reduced at high temperature. At the same reduction temperature, the hydrocarbon product selectivity shifts toward the light component with the reduction of the reduction time.