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A structured catalyst: Noble metal supported on a plate-type zirconia substrate prepared by anodic oxidation for steam reforming of hydrocarbon

Paper ID Volume ID Publish Year Pages File Format Full-Text
42587 45932 2009 8 PDF Available
Title
A structured catalyst: Noble metal supported on a plate-type zirconia substrate prepared by anodic oxidation for steam reforming of hydrocarbon
Abstract

A structured catalyst: noble metal supported on a plate-type zirconia substrate was prepared by subjecting a zirconium plate to a process consisting of anodic oxidation in an oxalic acid bath and calcination in the air, followed by rhodium or ruthenium component deposition by the dipping treatment. The catalytic performances of the prepared catalysts were evaluated for steam reforming of n-butane and propane. The substrate surface was significantly corroded by the anodic oxidation and calcination, and a rugged zirconia layer about 100 μm thick was formed. The crystalline state of zirconia was mainly monoclinic and tetragonal. In steam reforming of n-butane, the structured ruthenium catalyst had some activity, while the activity of the rhodium catalyst exceeded that of the commercial catalyst. For the rhodium catalyst, its reforming activity was improved by changing the temperature of dipping bath and the number of dips for adjustment of the rhodium deposition state. The rhodium catalyst prepared by dipping twice at a bath temperature of 25 °C has the largest metal surface area and a higher metal dispersion, which were thought to be the causes for the high performance. In steam reforming of propane, the rhodium catalyst showed a significantly higher activity than the commercial catalyst. The rhodium catalyst was less prone to deterioration of activity due to n-butane and propane reforming.

Graphical abstractIn order to construct a wall-type steam-reformer of hydrocarbon, we prepared a structured catalyst: noble metal supported on a plate-type zirconia substrate by means of anodic oxidation and calcination of a zirconium plate, followed by dipping treatment of rhodium and/or ruthenium component. The structured Rh/ZrO2 catalyst had a relatively high activity for n-butane reforming and propane reforming. Its activity progressed by adjusting of the temperature of the rhodium precursor bath and the number of dips.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Structured catalyst; Noble metal catalyst; Zirconia support; Anodic oxidation; Steam reforming of hydrocarbon
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A structured catalyst: Noble metal supported on a plate-type zirconia substrate prepared by anodic oxidation for steam reforming of hydrocarbon
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 370, Issues 1–2, 30 November 2009, Pages 42–49
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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