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Pd–LaMnO3 as dual site catalysts for methane combustion

Paper ID Volume ID Publish Year Pages File Format Full-Text
44153 46005 2007 9 PDF Available
Title
Pd–LaMnO3 as dual site catalysts for methane combustion
Abstract

Dual site Pd–LaMnO3 monolithic catalysts with different Pd loadings were prepared and tested in the high temperature lean premixed combustion of methane. It was shown that the novel catalysts effectively combine low and high temperature oxidation activity within a single system, which in turn has a wider operating window than Pd or LaMnO3 alone. In particular, evidence was found of a self-regenerative thermal activation process which restores Pd sites responsible for light-off at low temperature.Morphological and chemical analysis (SEM–EDS, BET, ICP-MS, XPS) of Pd–LaMnO3 catalysts were correlated to the results of extensive isothermal and self-sustained (steady state and transient) combustion tests in order to shed light on the nature of the catalytic species acting at different temperature levels, and on the reversible synergic interactions occurring between Pd and perovskite upon controlled thermal treatments or reaction ageing.

Graphical abstractNovel Pd–LaMnO3 combustion catalysts were developed which possess unique features: their dual site nature with matching operating ranges (low + mid/high temperature) makes them promising candidates for the development of fully catalytic or hybrid premixed radiant burners for both domestic and industrial applications with improved thermal efficiency and characterised by strongly discontinuous operation.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Catalytic combustion; Palladium; Perovskite; Structured catalysts; Methane; Catalyst self-regeneration; Steady-state multiplicity
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Pd–LaMnO3 as dual site catalysts for methane combustion
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 327, Issue 2, 15 August 2007, Pages 238–246
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