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vol.55 issue1POLY(SODIUM-10-UNDECYLENATE) AS PSEUDO-STATIONARY PHASE IN THE SEPARATION AND QUANTIFICATION OF POLYAROMATIC HYDROCARBONS BY MICELLAR ELECTROKINETIC CHROMATOGRAPHYSPIN-ORBIT AND SOLVENT EFFECTS IN THE LUMINESCENT [Re6Q8(NCS)6]4-, Q=S, Se, Te CLUSTERS: MOLECULAR SENSORS AND MOLECULAR DEVICES author indexsubject indexarticles search
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Journal of the Chilean Chemical Society

On-line version ISSN 0717-9707

Abstract

UBILLA, P; GARCIA, R; FIERRO, J.L.G  and  ESCALONA, N. HYDROCARBONS SYNTHESIS FROM A SIMULATED BIOSYNGAS FEED OVER FE/SIO2, CATALYSTS. J. Chil. Chem. Soc. [online]. 2010, vol.55, n.1, pp.35-38. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072010000100009.

The Fischer Tropsch reaction, using a simulated gas mixture similar to that obtained from biomass transformation (biosyngas), was studied over Fe/SiO2catalysts. The reaction was carried out in a stainless steel fixed bed reactor at 300 °C and 1 MPa. Excess solvent impregnation was used to prepare the catalysts. Nitrogen adsorption at -196 °C, thermal programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM) were used as characterization methods. The highest CO conversion was obtained for the catalyst with Fe-loading of 15wt% whereas it decreased at higher Fe loadings. The decrease ofthe activity is explained in terms ofthe drop ofthe active sites due to the formation of large Femetallic aggregates. The Fe/SiO2 catalysts presented a wide distribution of liquid hydrocarbons (C6 to C 18) and high methane formation. The liquid product distribution was related to the average size of iron particles. The increase of iron particle size favours the formation of hydrocarbons centred in C 11-14 chain length.

Keywords : Fischer Tropsch synthesis; biosyngas; Fe/SiO2 catalysts; biomass.

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