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Steam reforming of ethanol over metal-oxide-promoted Pt/SiO2 catalysts: Effects of strong metal-oxide interaction (SMOI)

Paper ID Volume ID Publish Year Pages File Format Full-Text
50941 46823 2010 4 PDF Available
Title
Steam reforming of ethanol over metal-oxide-promoted Pt/SiO2 catalysts: Effects of strong metal-oxide interaction (SMOI)
Abstract

The steam reforming of ethanol over metal-oxide-promoted Pt/SiO2 catalysts after H2 reduction was investigated. The catalysts were prepared by sequential impregnation with an aqueous solution of Pt(NO2)2(NH3)2 and aqueous solutions of metal complexes of V, Nb, and Mo. For a range of low temperatures (393–513 K), the ethanol conversion achieved by adding these metal oxides was greater than that achieved when an un-promoted-Pt/SiO2 catalyst was used. The highest ethanol conversion was achieved in the case of the Nb-oxide-promoted Pt/SiO2 catalyst; in this case, the ethanol conversion was the highest and it was 2.7 times higher than that in the case of the un-promoted Pt/SiO2 catalyst at 473 K. The results of catalyst characterization suggest that the surface of Pt metal particles was covered by NbOx. The effects of strong metal-oxide interaction (SMOI) in Pt–NbOx enhanced the steam reforming of ethanol.

Graphical AbstractThe steam reforming of ethanol over metal-oxide-promoted Pt/SiO2 catalysts after H2 reduction was investigated. The catalysts were prepared by sequential impregnation with an aqueous solution of Pt(NO2)2(NH3)2 and aqueous solutions of metal complexes of V, Nb, and Mo. For a range of low temperatures (393–513 K), the ethanol conversion achieved by adding these metal oxides was greater than that achieved when an un-promoted-Pt/SiO2 catalyst was used. The highest ethanol conversion was achieved in the case of the Nb-oxide-promoted Pt/SiO2 catalyst; in this case, the ethanol conversion was the highest and it was 2.7 times higher than that in the case of the un-promoted Pt/SiO2 catalyst at 473 K. The results of catalyst characterization suggest that the surface of Pt metal particles was covered by NbOx. The effects of strong metal-oxide interaction (SMOI) in Pt–NbOx enhanced the steam reforming of ethanol.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights►Strong metal-oxide interaction (SMOI) was induced in SMSI-oxide-promoted Pt/SiO2 catalysts; ►The effects of the SMOI enhanced catalytic activity of steam reforming of ethanol; ►Niobium oxide-promoted Pt/SiO2 catalyst was the most active in the reaction; ►Hydrogen formation rate was increased by the effects of the SMOI.

Keywords
Ethanol steam reforming; Bio-ethanol; Pt catalyst; SMOI; SMSI; Hydrogen production
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Steam reforming of ethanol over metal-oxide-promoted Pt/SiO2 catalysts: Effects of strong metal-oxide interaction (SMOI)
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 12, Issue 3, 30 November 2010, Pages 157–160
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
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