%P 48-53
%V 40
%I Science Press
%A S. Ali
%A N.A.M. Zabidi
%A D. Subbarao
%T Effect of niobium promoter on iron-based catalyst for Fischer-Tropsch reaction
%L scholars3204
%J Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology
%O cited By 8
%N 1
%D 2012
%X Niobium-promoted Fe/CNTs catalysts were prepared using a wet impregnation method. 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 iron oxide nanoparticles and the catalyst reducibility. 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 0.04Nb/Fe/CNTs catalyst, compared to those observed from other niobium compositions. The 0.04Nb/Fe/CNTs catalyst enhanced the C5+ hydrocarbons selectivity by a factor of 67.5 and reduced the methane selectivity by a factor of 59.2.
%K Catalyst selectivity; Gas adsorption; Iron oxides; Methane; Niobium, Average size; CNT; Effect of niobium; Fischer-Tropsch reaction; Fixed bed micro-reactor; Iron-based catalyst; Nitrogen adsorption; Wet impregnation method; XRD; ]+ catalyst, Fischer-Tropsch synthesis