Citation:
TU Jun-ling, XU Yong-jun, DING Ming-yue, WANG Tie-jun, MA Long-long, WANG Min-long. Preparation of nano-structured Fe3O4 catalysts and their performance in Fischer-Tropsch synthesis[J]. Journal of Fuel Chemistry and Technology,
;2015, 43(7): 839-845.
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Two shape-defined nano-structured Fe3O4 catalysts such as Nano-Microsphere (FNM) and Nano-Flake (FNF) were prepared by a simple solvothermal method. The effects of precursor type on Fe3O4 crystal morphology was studied. It is found that the rate of nucleation and crystal growth have a crucial influence on the particle morphology. Compared to the traditional Fe catalyst, the shape-defined nano Fe3O4 catalysts could be easily reduced and transferred into active phases, resulting in higher Fischer-Tropsch synthesis (F-T) activity and C5+ selectivity. Especially, the FNM catalyst displayed higher catalytic activity and stability than the FNF catalyst. It was found that the FNF catalyst was more favorable to agglomeration because of shape change of the flakes. In addition, the results indicate that the hydrocarbon selectivity is strongly affected by the particle morphology.
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