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- Title
Preparation of nanosheet Fe-ZSM-5 catalysts, and effect of Fe content on acidity, water, and sulfur resistance in the selective catalytic reduction of NO by ammonia.
- Authors
Ma, Luoning; Qu, Hongxia; Zhang, Jie; Tang, Qisheng; Zhang, Shule; Zhong, Qin
- Abstract
Direct synthesis of nanosheet Fe-ZSM-5 catalysts and their use for selective catalytic reduction (SCR) of NO by ammonia were studied. XRD, BET, SEM, EPR, and NH-TPD were used to understand the properties of catalysts with different iron loading. XRD confirmed the presence of the ZSM-5 crystal phase, and there was no FeO phase on the surface of the crystals. SEM showed the Fe-ZSM-5 catalysts comprised microspheres made up of nanosheets. EPR indicated that the iron was present as isolated Feand FeO oligomers uniformly dispersed throughout the crystals. NH-TPD indicated that Fe-ZSM-5 (20,1:1) had maximum acid sites and density at approximately 250 and 450 °C, respectively. Fe-ZSM-5 (20,1:1) had the highest activity in the SCR reaction with NH. It was also confirmed that Fe-ZSM-5 (20,1:1) had excellent resistance to SO and HO under the SCR reaction conditions. The effects of water vapor and SO, iron loading, and the Si/(Fe + Al) ratio were also investigated for these catalysts.
- Subjects
ZSM zeolites; METAL catalysts; ACIDITY; SELECTIVE catalytic oxidation; AMMONIA; NANOSTRUCTURED materials; CHEMICAL sample preparation; X-ray diffraction; CATALYTIC reduction
- Publication
Research on Chemical Intermediates, 2013, Vol 39, Issue 9, p4109
- ISSN
0922-6168
- Publication type
Article
- DOI
10.1007/s11164-012-0927-9