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

Paper ID Volume ID Publish Year Pages File Format Full-Text
44336 46015 2007 7 PDF Available
Title
Mössbauer and XPS spectroscopies studies of SMSI effect on Fe/Nb2O5 catalysts for the Fischer–Tropsch synthesis
Abstract

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.

Graphical abstractSMSI effect on the FTS was studied using two Fe/Nb2O5 catalysts prepared at two different reduction temperatures. The lower reduction temperature led to a partial covering of the Fe° crystals by NbOx species. The higher temperature produced an important activity decrease, methane production increase and a shift of the products to higher molecular weight hydrocarbons, “breaking” the Anderson–Schultz–Flory (ASF) distribution.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
SMSI effect; Fischer–Tropsch synthesis; Fe/Nb2O5 catalysts; Mössbauer spectroscopy
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Mössbauer and XPS spectroscopies studies of SMSI effect on Fe/Nb2O5 catalysts for the Fischer–Tropsch synthesis
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 326, Issue 1, 30 June 2007, Pages 113–119
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us