Operando XAS study of the influence of CO and NO on methane oxidation by Pd/Al2O3

16th International Conference on X-ray Absorption Fine Structure

Marchionni, V.^1 ; Nachtegaal, M.^1 ; Petrov, A.^1 ; Kröcher, O.^1,2 ; Ferri, D.^1

Paul Scherrer Institut, Villigen PSI

CH-5232, Switzerland^1

Institute of Chemical Science and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne

CH-1015, Switzerland^2

关键词: CH4 oxidation;    CO and NO;    Co oxidation;    Methane conversions;    Methane oxidation;    Pd/Al2O3;    Temperature programmed reactions;    XANES spectra;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/712/1/012051/pdf
DOI  :  10.1088/1742-6596/712/1/012051

来源: IOP

【 摘 要 】

Methane oxidation on Pd/Al2O3 has been investigated using operando X-ray absorption spectroscopy (XAS) at the Pd K-edge. The influence of CO and NO on methane abatement has been addressed performing temperature programmed reaction runs while recording simultaneously XANES spectra. During CO oxidation Pd is reduced while methane conversion is shifted to higher temperature. NO strongly inhibits both CO and CH4oxidation, despite the higher fraction of oxidized palladium.