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Pd/Co3O4-based catalysts prepared by solution combustion synthesis for residual methane oxidation in lean conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
53579 46975 2015 6 PDF Available
Title
Pd/Co3O4-based catalysts prepared by solution combustion synthesis for residual methane oxidation in lean conditions
Abstract

•Various PdO/Co3O4 catalysts prepared by one-shot solution combustion synthesis.•Catalysts tested towards the lean CH4 combustion.•Optimal PdO doping level of Co3O4 is 3 wt.%.•High dispersion of PdO species promotes catalytic CH4 oxidation.

In this work a series of palladium doped cobalt spinel catalysts was synthesized via solution combustion synthesis plus incipient wetness impregnation and tested in lean CH4 oxidation. The obtained catalysts were characterized from the structural and surface point of view (XRD, XRF, μRS, BET). The Pd doping level, calculated as PdO, ranged from 0.5 to 5 wt.%. The optimal palladium loading was determined on the basis of catalytic tests in gas mixtures containing from 0.5 to 2 vol.% of CH4. The temperature window for the catalytic activity of the Pd/Co3O4 materials spread from 270 to 550 °C. The optimal Pd loading was found to be 3 wt.%, and it was rationalized in terms of favorable surface Pd dispersion, since above this critical level of 3% an appreciable amount of PdO phase was formed. The reactivity of the optimal 3 wt.% Pd/Co3O4 catalyst from one-shot solution combustion synthesis was evaluated with the aim of optimizing the synthesis procedure.

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Keywords
Cobalt spinel; Palladium; Methane; Oxidation; Combustion; Lean conditions
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Pd/Co3O4-based catalysts prepared by solution combustion synthesis for residual methane oxidation in lean conditions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 257, Part 1, 15 November 2015, Pages 66–71
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