Citation: Minfang Wu, Hui Wang, Liangshu Zhong, Xinyan Zhang, Zhengping Hao, Qun Shen, Wei Wei, Guangren Qian, Yuhan Sun. Effects of acid pretreatment on Fe-ZSM-5 and Fe-beta catalysts for N₂O decomposition[J]. Chinese Journal of Catalysis, ;2016, 37(6): 898-907. doi: 10.1016/S1872-2067(15)61052-X shu

Effects of acid pretreatment on Fe-ZSM-5 and Fe-beta catalysts for N₂O decomposition

Minfang Wu ^a,b, ,
Hui Wang ^b ,
Liangshu Zhong ^b ,
Xinyan Zhang ^c ,
Zhengping Hao ^d ,
Qun Shen ^b ,
Wei Wei ^b,e ,
Guangren Qian ^a ,
Yuhan Sun ^b,e

a School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;
b CAS Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China;
c School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, Jilin, China;
d Department of Environmental Nano-materials, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
e ShanghaiTech University, Shanghai 201210, China

Received Date: 11 January 2016
Revised Date: 1 February 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (21307144, 21307007) and Science of Technology Development Plan of Jilin Province of China (20140520150JH).

Two series of ZSM-5 and beta zeolites were pretreated in 1.0 mol/L HNO₃ solution at room temperature for various time periods. The catalytic performances of their Fe-exchanged products in N₂O decomposition were evaluated. The Fe-zeolite catalysts were characterized using N₂ adsorption-desorption, inductively coupled plasma optical emission spectroscopy, X-ray diffraction, ultraviolet-visible spectroscopy, temperature-programmed desorption of NH₃, and scanning and transmission electron microscopies. For the ZSM-5 zeolite, acid leaching primarily takes place on the crystal surface and the particle size is reduced, therefore the pore channels are shortened. However, because of the good stability of MFI zeolites, the acid does not greatly penetrate the pore channels and new mesopores are not created. For the beta zeolite, because the amorphous material is inclined to dissolve (deagglomerate), some of the micropores are slightly dilated. The improved catalytic activities can be explained by the increased active Fe loading as a result of structural changes.© 2016, Dalian Institute of Chemical Physics, Chinese Academy of Sciences.
- Iron-containing zeolite,
- Nitrous oxide,
- Catalytic performance,
- Acid leaching,
- Active site
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Effects of acid pretreatment on Fe-ZSM-5 and Fe-beta catalysts for N₂O decomposition