Journal article
Accelerated hydrothermal ageing of Pd/Al2O3for catalytic combustion of ventilation air methane
Catalysis Science and Technology, Vol.5(8), pp.4008-4016
2015
Abstract
In this report, the characteristics of Pd/Al2O3 catalyst after long-term stability tests in catalytic combustion of simulated ventilation air methane gas were investigated with the objective of understanding catalyst deactivation phenomena. It was found that the deactivation is primarily due to palladium migration and particle growth and is the most prominent in the presence of water vapour. The formation of α-Al2O3 during long-term stability tests explains the changes in pore structures which is responsible for re-dispersion of palladium particles. Four accelerated ageing procedures were performed with an aim of mimicking the properties of used catalysts which have been operating continuously for extended time periods (over 1100 h). XRD patterns of aged catalysts disclose the absence of an alpha-alumina phase, suggesting that the transformation of alumina phase occurred at a very slow rate. Among the four procedures, ageing under wet-oxidizing atmosphere provides the catalyst bed that is the best match to the properties of long-term used catalysts in terms of performance and the characterization employed. Increasing the aging temperature up to 830°C leads to depletion of surface palladium, which permanently reduces the performance of the catalyst.
Details
- Title
- Accelerated hydrothermal ageing of Pd/Al2O3for catalytic combustion of ventilation air methane
- Authors/Creators
- A. Setiawan (Author/Creator) - University of Newcastle AustraliaJ. Friggieri (Author/Creator) - University of Newcastle AustraliaG. Bryant (Author/Creator) - University of Newcastle AustraliaE.M. Kennedy (Author/Creator) - University of Newcastle AustraliaB.Z. Dlugogorski (Author/Creator) - Murdoch UniversityM. Stockenhuber (Author/Creator) - University of Newcastle Australia
- Publication Details
- Catalysis Science and Technology, Vol.5(8), pp.4008-4016
- Publisher
- The Royal Society of Chemistry
- Identifiers
- 991005545009607891
- Copyright
- © The Royal Society of Chemistry.
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 2 Chemistry
- 2.41 Catalysts
- 2.41.25 Catalytic Oxidation
- Web Of Science research areas
- Chemistry, Physical
- ESI research areas
- Chemistry