Issue 12, 2017, Issue in Progress

Selective catalytic reduction of NO with NH3 over Mo–Fe/beta catalysts: the effect of Mo loading amounts

Abstract

A series of Mox–Fe/beta catalysts with constant Fe and variable Mo content were synthesized and investigated for selective catalytic reduction (SCR) of NOx with NH3. It was found that the Mo0.2–Fe/beta catalyst exhibited excellent activity, N2 selectivity and preferable resistance to H2O and SO2. The Mox–Fe/beta catalysts were characterized by various analytical techniques. TEM and SEM images showed that the addition of Mo could enhance the dispersion of iron oxides. The results of NH3-TPD and Py-IR indicated that the introduction of Mo resulted in a change of Brønsted acidity, which was associated with high-temperature SCR activity. XPS and XANES results showed that the introduction of Mo resulted in a change of Fe2+ content, which determined the low-temperature activity. DFT calculations showed the strong effects of Mo on the crystal structure, charge distribution and oxygen vacancy formation energy of iron oxides, which further explained the role of Mo in the catalyst behaviors during the SCR process.

Graphical abstract: Selective catalytic reduction of NO with NH3 over Mo–Fe/beta catalysts: the effect of Mo loading amounts

Supplementary files

Article information

Article type
Paper
Submitted
22 Nov 2016
Accepted
15 Jan 2017
First published
23 Jan 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 7130-7139

Selective catalytic reduction of NO with NH3 over Mo–Fe/beta catalysts: the effect of Mo loading amounts

J. Deng, J. Liu, W. Song, Z. Zhao, L. Zhao, H. Zheng, A. C. Lee, Y. Chen and J. Liu, RSC Adv., 2017, 7, 7130 DOI: 10.1039/C6RA27126J

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