Structure-performance relationship between denitration performance and catalytic interface morphologies of MnCeO_(x)/P84 catalytic filters  

作　　者：Bo Yang Yujie Lei Maosen Ni Liuying Wang Qiong Huang Mindong Chen 

机构地区：[1]Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET),Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control,School of Environmental Science and Engineering,Nanjing University of Information Science&Technology,Nanjing,210044,China

出　　处：《Journal of Rare Earths》2025年第3期516-525,I0004,共11页稀土学报(英文版)

基　　金：Project supported by the National Natural Science Foundation of China(51902166);the Natural Science Foundation of Jiangsu Province(BK20190786);Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET);Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control。

摘　　要：MnCeO_(x)/P84 catalytic filters with spherical,flower-like,cubic and rod-like catalytic interfaces were synthesized respectively,and their catalytic activities in the NH_(3)-SCR reaction were investigated.The MnCeO_(x)/P84 catalytic filter with spherical catalytic interfaces(recorded as S-MnCeO_(x)/P84)exhibits the best catalytic denitration performance.The NO_(x)removal efficiency of S-MnCeO_(x)/P84 reaches the highest value of 98.6%at 160℃when the catalyst loading is 100 g/m^(2).At the same time,S-MnCeO_(x)/P84 exhibits good SO_(2)resistance and stability,achieving a NO_(x)removal rate of 83%at 190℃with 30 ppm SO_(2).The characterization results illustrate that the MnCeO_x active component in S-MnCeO_(x)/P84 is present in weak crystalline states,tightly wrapped around the surface of the filter fiber,and uniformly dispersed,and the mesopore is the main pore structure of the S-MnCeO_(x)/P84,which can provide a channel for the catalytic reaction to proceed.At the same time,transmission electron microscopy(TEM)characterization shows that y-MnO_(2)is the main form of MnO_(2)in the S-MnCeO_(x)/P84.Further analysis of H_(2)temperature programmed reduction(H_(2)-TPR).NH_(3)temperature programmed desorption(NH_(3)-TPD)and in-situ diffuse reflectance infrared spectra(DRIFTS)show that S-MnCeO_(x)/P84 has good redox ability at 100-200℃and has abundant Lewis acid sites and Bronsteds acid sites,which provides an important guarantee for its superior low-temperature NH_(3)-SCR denitration performance.

关 键 词：Catalytic filter Nitrogen oxides(NO_x) DENITRATION Catalytic interface Rare earths 

分 类 号：X511[环境科学与工程—环境工程]