Mössbauer and XPS spectroscopies studies of SMSI effect on Fe/Nb2O5 catalysts for the Fischer-Tropsch synthesis

In order to study if the SMSI effect produces benefitial results on the Fischer-Tropsch (FT) reaction using the Fe/Nb2O5 system we prepared two catalysts by reduction at two different temperatures. The solids were characterized by Mössbauer spectroscopy, XRD, XPS, N2 adsorption, atomic absorption, C...

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Bibliographic Details
Authors: Cagnoli, Maria Virginia, Alvarez, Ana María, Gallegos, Norma Graciela, Bengoa, Jose Fernando, Duarte de Souza, C. D., Schmal, Martin, Marchetti, Sergio Gustavo
Format: article
Status:Published version
Publication Date:2007
Country:Argentina
Institution:Consejo Nacional de Investigaciones Científicas y Técnicas
Repository:CONICET Digital (CONICET)
Language:English
OAI Identifier:oai:ri.conicet.gov.ar:11336/54134
Online Access:http://hdl.handle.net/11336/54134
Access Level:Open access
Keyword:Fe/Nb2o5 Catalysts
Fischer-Tropsch Synthesis
MÖSsbauer Spectroscopy
Smsi Effect
https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
Description
Summary:In order to study if the SMSI effect produces benefitial results on the Fischer-Tropsch (FT) reaction using the Fe/Nb2O5 system we prepared two catalysts by reduction at two different temperatures. The solids were characterized by Mössbauer spectroscopy, XRD, XPS, N2 adsorption, atomic absorption, CO chemisorption and volumetric oxidation. It was demonstrated that the support is partially reduced leading to a covering of the Fe° crystals by NbOx species. At the higher reduction temperature studied (773 K) this effect produced a very important activity decrease, an increase in methane production and a shift of the product distribution towards to higher molecular weight hydrocarbons. © 2007 Elsevier B.V. All rights reserved.

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