Hydrogen production by oxidative methanol reforming on Pd/ZnO: Catalyst deactivation

The durability performance of Pd/ZnO for oxidative methanol reforming has been investigated. While Cu/ZnO lost its activity with a constant selectivity of CO formation, Pd/ZnO exhibited a more stable activity, but with increasing CO production throughout the reaction time on stream. Characterization...

Full description

Saved in:
Bibliographic Details
Published in:Applied catalysis. A, General General, 2006-01, Vol.299, p.58-65
Main Authors: Liu, Shetian, Takahashi, Katsumi, Fuchigami, Kenji, Uematsu, Kazuo
Format: Article
Language:English
Subjects:
Catalysis
Catalyst deactivation
Chemistry
Exact sciences and technology
General and physical chemistry
Hydrogen production
Methanol
Oxidative steam reforming
Palladium
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Zinc oxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The durability performance of Pd/ZnO for oxidative methanol reforming has been investigated. While Cu/ZnO lost its activity with a constant selectivity of CO formation, Pd/ZnO exhibited a more stable activity, but with increasing CO production throughout the reaction time on stream. Characterization of the catalyst using XRD and XPS revealed the formation of a Pd–Zn alloy, which was thought to be essential for the selective production of hydrogen. Based on the reaction and the catalyst characterization results, two routes were supposed for the deactivation of Pd/ZnO catalyst: surface fouling by deposited carbon and surface oxidation of the Pd–Zn alloy, breaking down the Pd–Zn alloy to produce more elemental Pd on a ZnO support. The catalyst can be regenerated in a H 2 reducing atmosphere at higher temperatures and in a diluted O 2 atmosphere at lower temperatures.
ISSN:0926-860X
1873-3875
DOI:10.1016/j.apcata.2005.10.012