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Issue 21, 2016
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Effect of magnesium substitution into Fe-based La-hexaaluminates on the activity for CH4 catalytic combustion

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Abstract

With the introduction of Mg2+ into Fe-substituted La-hexaaluminate precursors, a series of monophasic LaMgxFeAl11−xO19 (x = 0, 0.3, 0.7, 1) catalysts were prepared and tested as catalysts for CH4 catalytic combustion. The results show that the introduction of an appropriate amount of Mg2+ (x = 0.7) could significantly enhance the catalytic activity of Fe-substituted La-hexaaluminates and promote the resistance to deactivation after calcination at 1300 °C. The beneficial effect of Mg2+ is attributed to the fact that the presence of Mg2+ not only increased the distribution of Fe3+ in the mirror planes of La-hexaaluminates but also effectively suppressed the generation of catalytically inactive Fe2+. Besides, the LaMg0.7FeAl10.3O19 catalyst exhibits excellent stability for 100 h at 700 °C under the reaction conditions.

Graphical abstract: Effect of magnesium substitution into Fe-based La-hexaaluminates on the activity for CH4 catalytic combustion

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Article information


Submitted
12 Jul 2016
Accepted
13 Sep 2016
First published
14 Sep 2016

Catal. Sci. Technol., 2016,6, 7860-7867
Article type
Paper

Effect of magnesium substitution into Fe-based La-hexaaluminates on the activity for CH4 catalytic combustion

F. Huang, X. Wang, L. Li, X. Liu, J. Xu, C. Huang and T. Zhang, Catal. Sci. Technol., 2016, 6, 7860
DOI: 10.1039/C6CY01491G

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