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Reforming of ethanol on Pt/Al2O3-ZrO2 catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
41994 45907 2010 10 PDF Available
Title
Reforming of ethanol on Pt/Al2O3-ZrO2 catalyst
Abstract

The steam reforming of ethanol was investigated at 723 K over Al2O3, ZrO2 and Al2O3-ZrO2 supported Pt catalysts. The samples were characterized by XPS and TPR methods. The surface species formed during the adsorption of ethanol and during the catalytic reaction were investigated by DRIFT and TPD. According to the XPS results the zirconia was partially reduced during the pretreatment and the surface of the catalysts was relatively poor in Zr. Adsorbed CO and surface acetate were detected during the catalytic reaction at 723 K. It means that the formation rate of these species is higher than their decomposition or further reaction. It was established that the acetate located mainly on the Al2O3 surface and much smaller amount can be found on ZrO2 and on Al2O3-ZrO2 supported samples.The decay in the selectivity of H2 and CO2 caused by the surface acetate species on Pt/Al2O3 decreased in the presence of ZrO2. DRIFT and TPD measurements showed that the zirconia destabilized the acetate groups which resulted in the enhanced H2 and CO2 selectivity. The highest turnover number and yield was found on Pt/Al2O3-ZrO2 (1:3).

Graphical abstractThe steam reforming of ethanol was investigated at 723 K over Al2O3, ZrO2 and Al2O3- ZrO2 supported Pt catalysts. It was found that the hydrogen and carbon dioxide selectivity increased in the steady state in the presence of zirconia. Adsorbed CO and surface acetate were detected during the catalytic reaction at 723 K. It was established that the acetate located mainly on the Al2O3 surface and much smaller amount can be found on ZrO2 and on Al2O3-ZrO2 supported samples.Figure optionsDownload full-size imageDownload high-quality image (172 K)Download as PowerPoint slide

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Reforming of ethanol on Pt/Al2O3-ZrO2 catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 383, Issues 1–2, 31 July 2010, Pages 33–42
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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