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Catalytic performance of plate-type Pd/Zn-based catalysts for steam reforming of methanol, prepared by electroless plating

Paper ID Volume ID Publish Year Pages File Format Full-Text
43453 45970 2007 9 PDF Available
Title
Catalytic performance of plate-type Pd/Zn-based catalysts for steam reforming of methanol, prepared by electroless plating
Abstract

It has been reported that a Pd/ZnO catalyst, which consists of palladium and zinc oxide, shows high performance in steam reforming of methanol. By processing this granular catalyst into a plate-type catalyst, a hybrid wall-type methanol reformer with high heat resistance and high reforming performance would be constructed. In this study, such a plate-type Pd-ZnO catalyst was prepared on an aluminum substrate by electroless plating, which consisted of a displacement plating of zinc and a chemical reduction plating of palladium. The catalytic properties of the prepared Pd-ZnO catalyst for steam reforming of methanol were then investigated.The reforming properties of the prepared catalyst varied depending on the reducing agent used in the palladium plating. The plate-type catalyst prepared with a trimethylamine-borane (TMBA) as the reducing agent exhibited high reforming properties. The measurements of physicochemical properties for such plated layer proved that a PdZn alloy was formed on the surface layer. The PdZn alloy, which was thought to be the active-site of methanol reforming, formed in the plated layer when a continuous treatment of hydrogen reduction followed by oxidation was carried out prior to the reaction. In contrast, when either reduction or oxidation treatments individually were carried out prior to the reaction, little PdZn alloy was formed. The continuous treatment of hydrogen reduction followed by oxidation was thought to be an important operation in proceeding the reforming activity. In addition, the durability in reforming properties of the prepared Pd-ZnO catalyst was examined at 350 °C. The prepared catalyst was less prone to deterioration, and restored and progressed its initial performance when a reoxidation treatment was carried out on the deteriorated surface.

Graphical abstractThe plate-type Pd-Zn catalyst was prepared on an aluminum substrate by electroless plating with trimethylamine-borane as a reducing agent. The prepared catalyst exhibited high performance for steam reforming of methanol when a continuous treatment of reduction followed by oxidation was carried out. This Pd-Zn catalyst was less prone to deterioration, and restored and progressed its initial activity by reoxidation. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Wall-type catalyst; Structured catalyst; Palladium catalyst; Electroless plating; Steam reforming of methanol
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Catalytic performance of plate-type Pd/Zn-based catalysts for steam reforming of methanol, prepared by electroless plating
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 330, 10 October 2007, Pages 108–116
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