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使用连续共沉淀反应器制备了浆态床FT合成用的Fe Cu K Si催化剂。考察了钾含量、粘合剂的添加以及催化剂还原方法等对催化剂性能的影响。 1L高压搅拌釜的试验结果表明粘合剂添加方法B和低压CO还原条件下的No 9催化剂性能较好。在质量空速为无载体Fe Cu K催化剂 1 5倍的条件下 ,No 9催化剂的合成气转化率 ,C+1 和C+5产物的产率均高于无载体Fe Cu K催化剂 ,甲烷选择性为 3 2 %。特别在富CO合成气条件下C+5的单程产率达到 1 30g m3 (CO +H2 )以上。假设对氢为一级反应动力学的条件下 ,使用表观速率常数对No 9催化剂的反应活性的经时变化作了考察 ,结果表明表观速率常数较合成气转化率能相对地反映不同反应条件下的催化剂活性
The Fe Cu K Si catalyst for slurry FT synthesis was prepared using a continuous coprecipitation reactor. The effects of potassium content, binder addition, and catalyst reduction methods on the catalyst performance were investigated. The experimental results of the 1L high pressure stirred tank showed that the No9 catalyst under the conditions of the addition of the binder B and the low-pressure CO reduction was better. The syngas conversion, the yields of C + 1 and C + 5 products for No 9 catalyst were all higher than those for the carrier-free Fe Cu K catalyst at a mass space velocity of 15 times the carrier-free Fe Cu K catalyst. The methane selectivity Sex is 32%. Especially in the case of CO-rich syngas, C + 5 yields above 130 gm 3 (CO + H 2). Assuming hydrogen as the first order reaction kinetics, the apparent rate constants were used to investigate the temporal changes in the reactivity of No 9 catalyst. The results show that the apparent rate constants can reflect relatively different reactions Under the conditions of catalyst activity