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Issue 12, 2002
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A Mössbauer study of In–Fe2O3/HZSM-5 catalysts for the selective catalytic reduction of NO by methane

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Abstract

The selective catalytic reduction of NO by CH4 was compared over In–Fe2O3/HZSM-5 catalysts prepared by impregnation and co-impregnation methods. It was found that the catalyst preparation method greatly affected the catalyst activity. The impregnated catalyst was very active, but the co-impregnated one showed poor activity. The In–Fe2O3/HZSM-5 catalysts were investigated by Mössbauer spectroscopy. The results showed that indium cations entered into the iron oxide lattice in the co-impregnated catalyst, while the impregnated catalyst exhibited a more stable structure, when both of the catalysts were treated severely in the reaction atmosphere. Characterization by means of combined in situ temperature programmed reduction (TPR)-Mössbauer spectroscopy further revealed that the performances of the two catalysts were different in the TPR processes.

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Article information


Submitted
16 Nov 2001
Accepted
09 Apr 2002
First published
15 May 2002

Phys. Chem. Chem. Phys., 2002,4, 2846-2851
Article type
Paper

A Mössbauer study of In–Fe2O3/HZSM-5 catalysts for the selective catalytic reduction of NO by methane

X. Wang, X. Zhao, J. Shen, X. Sun, T. Zhang and L. Lin, Phys. Chem. Chem. Phys., 2002, 4, 2846
DOI: 10.1039/B110515A

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