One-pot synthesis of Fe/Cu-SSZ-13 catalyst and its highly efficient performance for the selective catalytic reduction of nitrogen oxide with ammonia

作     者：Jie Wan Jiawei Chen Ru Zhao Renxian Zhou Jie Wan;Jiawei Chen;Ru Zhao;Renxian Zhou

作者机构：Energy Research InstituteNanjing Institute of TechnologyNanjing 211167China Institute of CatalysisZhejiang UniversityHangzhou 310028China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2021年第33卷第2期

页      面：306-316页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：the Key Program of Science Technology Department of Zhejiang Province(No.2018C03037) the Scientific Research Fund of Nanjing Institute of Technology(No.YKJ2019111)。 

主　　题：NH3-SCR Fe/Cu-SSZ-13 One-pot synthesis Active species 

摘      要：Series of Fe/Cu-SSZ-13 catalysts with different Fe loading content were synthesized by simple one-pot strategy.The obtained catalysts were subjected to selective catalytic reduction(SCR)of NO x with NH 3 and were characterized by various techniques.The results show that Fe 0.63/Cu 1.50-SSZ-13 catalyst with proper Fe content exhibits excellent catalytic activity with widest operation temperature window from 160 to 580℃,excellent hydrothermal stability as well as good resistance to sulfur poisoning when compared with Cu-SSZ-13,signifying its great potential for practical applications.Further characterizations reveal that the synthesized Fe/Cu-SSZ-13 catalysts present typical chabazite(CHA)structure with good crystallinity,while isolated Cu^2+and monomeric Fe 3+are revealed as the predominant copper and iron species.At low temperatures,isolated Cu^2+species act as primary active sites for SCR reaction,while monomeric Fe^3+species provide sufficient active sites for sustain the SCR activity at high temperature.Moreover,Fe over doping would lead to the damage of zeolite structure,destruction of isolated Cu^2+site,as well as the formation of highly oxidizing Fe2O3,thus causing deterioration of catalytic performances.