Fischer Tropsch synthesis from a simulated biosyngas feed over Co(x)/SiO2 catalysts: Effect of Co-loading

Hydrocarbons Synthesis From a Simulated Biosyngas Feed Over Fe/Sio2, Catalysts

“…Clearly, the Fe phase appears as rather large crystallites (around 32 nm) up to 15 % of Fe. This trend is similar to that found with Co/SiO 2 catalysts previously [9], where the activity increased almost linearly with increasing Co-loading, reaching the maximum at about 20 wt% Co and then levelled off. The observed deviation from linearity above 15 % of Fe suggests the formation of large segregated crystalline particles (over 37 nm) mainly on the external surface of the silica particles.…”

“…In general, the Fe/SiO 2 catalysts present a broad particle size distribution upon increasing Fe-loading and the average particle was found to increase gradually with Fe loading from 29 to 40 nm (Table 1). This trend is similar to that found with Co/SiO 2 catalysts [9]. However, the average particle size obtained for Co/SiO 2 is higher than for Fe/ SiO 2 catalysts.…”

“…These results indicate that Fe/ SiO 2 catalysts present a high selectivity to CH 4 which also increases with Feloading. However, these values are lower than those recorded for Co/SiO 2 catalysts (95 %) [9]. On the other hand, the Fe(10)/SiO 2 catalyst presents a high formation rate of CO 2 , which decreases with the increase of Fe content.…”

“…The hydrocarbons produced according to the FT synthesis using biosyngas mixtures are free of S and N, and in principle can be considered neutral in the CO 2 greenhouse effect. The body of work related to hydrocarbon synthesis using syngas mixtures produced according to the steam methane reforming technology is enormous [1,2,3,4,5,6], however the literature describing the production of hydrocarbons from biosyngas is much more limited [7,8,9,10,11]. In the line Jun et al [7] reported the synthesis of liquid hydrocarbons over Fe/Cu/Al/K (100/6/16/4) catalysts using biosyngas mixtures.…”

“…These authors found that this catalyst produces high fuel yield and selectivity to olefins. Recently, Escalona et al [8] have studied the synthesis of hydrocarbons from biosyngas over Co/ SiO 2 catalysts promoted by Cu, Re, Ru and Cu [9]. They found that the CO conversion over these catalysts is mainly determined by the dispersion of Co species.…”