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Hydrogen production by auto-thermal reforming of ethanol over nickel catalysts supported on metal oxides: Effect of support acidity

Paper ID Volume ID Publish Year Pages File Format Full-Text
47332 46468 2010 8 PDF Available
Title
Hydrogen production by auto-thermal reforming of ethanol over nickel catalysts supported on metal oxides: Effect of support acidity
Abstract

Nickel catalysts supported on pure metal oxides (ZnO, MgO, ZrO2, TiO2, and Al2O3) with different acidity were prepared by an incipient wetness impregnation method, and they were applied to the hydrogen production by auto-thermal reforming of ethanol. The effect of support acidity on the catalytic performance of supported nickel catalysts was investigated. It was revealed that acidity of support played an important role in determining the reaction pathway and catalytic performance in the auto-thermal reforming of ethanol. Among various pure metal oxides, ZrO2 and TiO2 with an intermediate acidity were found to be efficient supporting materials for nickel catalysts in the auto-thermal reforming of ethanol. On the basis of this result, a series of TiO2–ZrO2 mixed metal oxides (TiXZr1−XO2) with different Ti content (X) were prepared by a sol–gel method for use as supporting materials for nickel catalysts. In hydrogen production by auto-thermal reforming of ethanol, an optimal Ti content was required for suitable acidity of TiXZr1−XO2 support and favorable reducibility of Ni/TiXZr1−XO2 catalyst. Hydrogen yield over nickel catalysts supported on metal oxides showed a volcano-shaped curve with respect to acidity of the support. Among the catalysts tested, Ni/Ti0.2Zr0.8O2 with an intermediate acidity of support exhibited the best catalytic performance.

Graphical abstractHydrogen production by auto-thermal reforming of ethanol over nickel catalysts supported on pure metal oxides (ZnO, MgO, ZrO2, TiO2, and Al2O3) and mixed metal oxides (TiXZr1−XO2) was conducted. Hydrogen yield over supported nickel catalysts showed a volcano-shaped curve with respect to acidity of the support. Among the catalysts, Ni/Ti0.2Zr0.8O2 with an intermediate acidity of support exhibited the best catalytic performance.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Hydrogen; Auto-thermal reforming of ethanol; Support acidity; Supported nickel catalyst; Metal oxides
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Hydrogen production by auto-thermal reforming of ethanol over nickel catalysts supported on metal oxides: Effect of support acidity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 98, Issues 1–2, 20 July 2010, Pages 57–64
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