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Environmental Science and Pollution Research

, Volume 26, Issue 2, pp 1706–1715 | Cite as

Effect of iron loading on the performance and structure of Fe/ZSM-5 catalyst for the selective catalytic reduction of NO with NH3

  • Xue-tao WangEmail author
  • Hai-peng Hu
  • Xing-yu Zhang
  • Xiao-xin Su
  • Xiao-dong Yang
Research Article
  • 101 Downloads

Abstract

A series of Fe/ZSM-5 catalysts with different Fe contents were prepared by impregnation method. The catalysts were characterized by TEM, XRD, H2 temperature-programed reduction (H2-TPR), temperature-programed desorption of ammonia (NH3-TPD), and in situ diffuse-reflectance infrared Fourier transform spectroscopy (DRIFTS), and the catalytic activity test was also carried out on selective catalytic reduction (SCR) denitration device. Results showed that the single metal iron-supported ZSM-5 catalyst has high deNOx activity in the medium–high temperature range, and the optimal loading of Fe active component is 10 wt%; the deNOx efficiency over 80% at the range of 350–450 °C and 431 °C reaches the maximum of 96.91%. Iron species can be finely dispersed on the surface of the carrier as amorphous oxides, and the crystalline structure of zeolite is retained. The significant redox performance, highly dispersed nanoparticles, and rich Lewis acid sites on the surface of catalyst are favorable for the SCR denitration reaction. Fe/ZSM-5 10 wt% catalyst has rich Lewis acid sites and less B acid sites and Lewis acidic sites play an important role during the reaction. Only Eley–Rideal (E-R) mechanism existed during the NH3-SCR reaction process, and there is no denitration reaction being accomplished by L-H mechanism at 150 °C.

Keywords

Fe/ZSM-5 SCR DeNOx In situ DRIFTS Reaction mechanism 

Notes

Funding information

This work was supported by the National Natural Science Foundation of China (Nos. 50806020, 51506046), Excellent Youth Foundation of Henan Scientific Committee (No. 114100510010), and National Natural Science Foundation of Henan Province (No. 182300410256).

Supplementary material

11356_2018_3513_MOESM1_ESM.doc (27 kb)
ESM 1 (DOC 27 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Energy and Power EngineeringHenan University of Science and TechnologyLuoyangChina
  2. 2.National Engineering Lab of Coal-fired Pollution Emission ReductionShandong UniversityJinanChina

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