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Ni/Mg–Al mixed oxide catalyst for the steam reforming of ethanol

Paper ID Volume ID Publish Year Pages File Format Full-Text
42307 45920 2009 12 PDF Available
Title
Ni/Mg–Al mixed oxide catalyst for the steam reforming of ethanol
Abstract

A series of 10 wt% Ni-loaded Mg–Al mixed oxide supported catalysts were evaluated for the production of hydrogen via the steam reforming of ethanol. Mg–Al mixed oxide supported nickel catalysts were found to give superior activity, H2 and COx product selectivity, and improved catalyst stability compared to the pure oxide supported nickel catalysts. Performance was dependent upon the Al and Mg content of the support. At 923 K, the mixed oxide supported catalysts exhibited the highest H2 and COx yields and were stable, showing no signs of deactivation after 20 h of operation. The improved performance of these catalysts was related to the incorporation of the pure oxides, MgO and Al2O3, into a MgAl2O4 phase. The formation of MgAl2O4 reduced nickel incorporation into the supports leaving nickel in its active form. In addition, the formation of MgAl2O4, a slightly basic material, exhibited moderate acidic and basic site strength and density compared to the pure oxide supported catalysts. Moderation of the acid–base properties improved the activity, selectivity, and stability of the catalysts by reducing activity for by-product reactions.

Graphical abstractNi-loaded Mg–Al mixed oxide supported catalysts were evaluated for the production of hydrogen via the steam reforming of ethanol. Mg–Al mixed oxide supported nickel catalysts exhibited superior activity, H2 and COx product selectivity, and improved catalyst stability compared to the pure oxide supported catalysts. Performance was dependent upon the Al and Mg content of the support.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Ethanol steam reforming; Hydrogen production; Nickel; Hydrotalcite; Mixed oxide support
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Ni/Mg–Al mixed oxide catalyst for the steam reforming of ethanol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 363, Issues 1–2, 1 July 2009, Pages 52–63
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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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