FT-IR spectroscopic investigation of the surface reaction of CH4 with NOx species adsorbed on Pd/WO3–ZrO2 catalyst

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FT-IR spectroscopic investigation of the surface reaction of CH4 with NO x species adsorbed on PdWO3-ZrO2 catalyst.pdf (863.64 KB)

Date

2007

Authors

Kantcheva, M.
Cayirtepe, I.

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Abstract

The interaction of methane at various temperatures with NO x species formed by room temperature adsorption of NO + O2 mixture on tungstated zirconia (18.6 wt.% WO3) and palladium(II)-promoted tungstated zirconia (0.1 wt.% Pd) has been investigated using in situ FT-IR spectroscopy. A mechanism for the reduction of NO over the Pd-promoted tungstated zirconia is proposed, which involves a step consisting of thermal decomposition of the nitromethane to adsorbed NO and formates through the intermediacy of cis-methyl nitrite. The HCOO- formed acts as a reductant of the adsorbed NO producing nitrogen. © Springer Science+Business Media, LLC 2007.

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Catalysis Letters

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Keywords

CH4 - SCR, Cis-methyl nitrite, Decomposition of nitromethane, In situ FT - IR, Mechanism, Pd2+/WO 3-ZrO2, Reactivity toward CH4, Surface NO x complexes, WO3/ZrO2, Catalyst activity, Fourier transform infrared spectroscopy, Nitrogen oxides, Pyrolysis, Surface reactions, Zirconia, Nitromethane, Methane

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http://hdl.handle.net/11693/23448

Published Version (Please cite this version)

http://dx.doi.org/10.1007/s10562-007-9081-1

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Scholarly Publications - Chemistry

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English

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Article