کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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64330 | 48325 | 2012 | 6 صفحه PDF | دانلود رایگان |
Niobium-promoted Fe/CNT catalysts were prepared using the wet impregnation method. The samples were characterized by nitrogen adsorption, H2-TPR, TPD, XRD and TEM. The Fischer-Tropsch Synthesis (FTS) was carried out in a fixed-bed microreactor at 220°C, 1 atm and H2/CO=2 for 5 h. Addition of niobium into Fe/CNTs increased the dispersion, decreased the average size of the iron oxide nanoparticles and the catalyst reducibility. The niobium-promoted Fe catalyst resulted in appreciable increase in the selectivity of C5+ hydrocarbons and suppressed methane formation. These effects were more pronounced for the 0.04%Nb/Fe/CNT catalyst, compared to those observed from other niobium compositions. The 0.04%Nb/Fe/CNT catalyst enhanced the C5+ hydrocarbons selectivity by a factor of 67.5% and reduced the methane selectivity by a factor of 59.2%.
Journal: Journal of Fuel Chemistry and Technology - Volume 40, Issue 1, January 2012, Pages 48-53