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中文摘要：
采用连续共沉淀方法制备了无定形Fe-Cu-K-SiO2催化剂,利用连续共沉淀与喷雾干燥成型技术相结合的方法制备了不同粒径的微球形Fe-Cu-K-SiO2催化剂.在接近反应工况的条件下对催化剂进行了浆态床费-托合成（FTS）反应性能评价,并对催化剂进行了物性表征.表征结果表明,无定形催化剂没有规整的外形和均一的粒径分布,微球形催化剂的表面光滑,球形度好,颗粒分布均匀.浆态床FTS反应评价结果表明,尽管无定形催化剂的初活性及最高活性较高,但蜡产物与催化剂的在线分离困难;随着成型时平均粒径的增大,微球形催化剂的活性降低,但失活速率减慢,烃产物选择性向轻组分方向偏移,容易实现蜡产物与催化剂的在线分离.
英文摘要：
An amorphous Fe-Cu-K-SiO2 catalyst was prepared by continuous coprecipitation, and three microspheric Fe-Cu-K-SiO2 catalyst samples with different particle size were prepared by the combination method of continuous coprecipitation with spray drying. The textural and structural properties of the catalyst samples were characterized by scanning electron microscopy, Mossbauer effect spectroscopy, particle size distribution, and N2 physisorption. The amorphous sample has not regular figuration and uniform particle size. However, the mierospheric samples exhibit smooth surface, fine sphericity, and uniform particle size. The Fischer-Tropsch synthesis （FTS） reaction performance over the catalyst samples was evaluated in a stirred tank slurry reactor under the industrial relevant reaction conditions. The initial and the highest FTS activity of the amorphous sample was higher than that of the microspheric samples, but the on-line separation between the wax product and the catalyst was much more difficult. The activity of the microspheric samples for FTS reaction decreased with the increase of the average catalyst particle size, and the same trend was observed for the catalyst deactivation. The hydrocarbon selectivity shifted toward the light molecule product with the increase of the average catalyst particle size. Meanwhile, the on-line separation between the wax product and the catalyst can he performed easily, and the run stability was improved.
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