Catalytic Reduction of N2O by NH3 over Fe-zeolite Catalysts with Different Topologies

被引：1
作者：
Du, Shaohua [1 ]
Kang, Bin [1 ]
Guo, Xiaonan [1 ]
Wei, Ying [1 ]
Jia, Jingbo [1 ]
Zhang, Runduo [1 ]
机构：
[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing Key Lab Energy Environm Catalysis, Beijing 100029, Peoples R China
来源：
CATALYSIS LETTERS | 2024年 / 154卷 / 07期
关键词：
Beta zeolite; Topological effect; Fe species; Catalytic reduction; BETA CATALYSTS; ION-EXCHANGE; BEA ZEOLITE; DECOMPOSITION; IRON; NO; OXIDE; SCR; PERFORMANCES; MECHANISM;
D O I：
10.1007/s10562-024-04637-7
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
To reveal the effect of zeolite topology on the status of iron species, a series of Fe-zeolite catalysts (Fe-Beta, Fe-ZSM-5, Fe-Y, Fe-ZSM-35, Fe-MCM-22, Fe-SSZ-13) were synthesized using the wet ion-exchange technique. The catalytic reduction of N2O by NH3 with Fe-zeolites was carried out, and the corresponding activities followed the order Fe-Beta > Fe-ZSM-5 > Fe-Y > Fe-ZSM-35 > Fe-MCM-22 > Fe-SSZ-13. The Fe-Beta catalyst shows the best activity, which achieving more than 98% N2O conversion at 350 degree celsius. The prepared catalysts were subjected to physicochemical characterization. It shows that the structure of Fe-Beta and Fe-ZSM-5 zeolite facilitated the loading of Fe ions upon the framework of zeolites through the pores and the sequent formation of active centers (Fe3+) on the ion exchange sites. In addition, the larger pore sizes in Fe-zeolites are more favorable for the diffusion of N2O within the pores and channels of the zeolite, so the catalytic reduction of N2O by ammonia is promoted.
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页码：3947 / 3957
页数：11
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