催化作用
氮氧化物
热液循环
选择性催化还原
化学
无机化学
离子
离子交换
水热合成
化学工程
物理化学
有机化学
燃烧
工程类
作者
Lei Xu,Ye Wang,Yi Cao,Feng Zhang,Yu Song,Chunling Yu,Peng Tian,Lei Sun
标识
DOI:10.1016/j.micromeso.2023.112978
摘要
A novel Cu-exchanged catalyst, Cu-SAPO-56 prepared by direct ion exchange method, was studied for NH3-SCR reaction. Cu-SAPO-56 exhibits excellent NH3-SCR activity and hydrothermal stability. The NOx conversion of Cu-SAPO-56 maintains more than 90 % at a wide temperature range between 250 °C to 400 °C even after a rigorous steam treatment (800 °C for 16 h or 50 °C for 24 h). The isolated Cu2+ ions located in double 6-ring of AFX structure are determined as the catalytic active sites. Both of Cu content and Si content in Cu-SAPO-56 play critical roles in NH3-SCR activity and hydrothermal stability. The excellent catalytic performance and strong hydrothermal stability exhibits the huge application potential of Cu-SAPO-56 for NH3-SCR reaction.
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