Highly dispersed iron species created on alkali-treated zeolite for ammonia SCR

作     者：Jing Ma Duan Weng Xiaodong Wu Zhichun Si Zhenwei Wu 

作者机构：State Key Laboratory of New Ceramics & Fine ProcessingSchool of Materials Science and Engineering Yangtze Delta Region Institute of Tsinghua University Advanced materials instituteGraduate School at ShenzhenTsinghua University 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2013年第23卷第5期

页      面：493-500页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：the Ministry of Science and Technology,PR China for financial support of Project 2013AA065302 the Science and Technology Department of Zhejiang Province for Project 2011C31010 

主　　题：Fe/ZSM-5 Alkaline treatment Brnsted acidity Iron dispersion NH3-SCR 

摘      要：Alkaline treatment using sodium hydroxide was introduced to obtain a hierarchical pore structure in H-ZSM-5 ***-exchanged zeolite catalysts were prepared by impregnation on the original and alkali-treated zeolites,and were evaluated for NOx reduction by NH3,NO oxidation,and NH3 oxidation *** highly dispersed iron species as active sites can be obtained by controlling the pore structure and particle size of ***,the Fe/ZSM-5 catalyst treated mildly by sodium hydroxide before iron exchange,which contains amounts of highly dispersed Fe species,obtains over80% NOx conversion at a wide temperature range of 250-500℃.