Effects of cerium and tungsten addition on acid-base properties of spindle-likeα-Fe_(2)O_(3)in low-temperature SCR of NO_(x)with NH_(3)

作     者：Jun Ni Xuanbei Peng Linlin Yang Kai Zhang Yangyu Zhang Yanliang Zhou Xiuyun Wang Chak-tong Au Lilong Jiang Jun Ni;Xuanbei Peng;Linlin Yang;Kai Zhang;Yangyu Zhang;Yanliang Zhou;Xiuyun Wang;Chak-tong Au;Lilong Jiang

作者机构：National Engineering Research Center of Chemical Fertilizer CatalystFuzhou UniversityFuzhou 350002China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2022年第40卷第11期

页      面：1734-1742,I0003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）] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project supported by the National Natural Science Foundation of China(21703037,22108037) the Natural Science Foundation of Fujian(2018J10691) 

主　　题：NH_(3)-SCR Fe_(2)O_(3) NO_(x)removal Acidity/basicity properties Morphology structure Rare earths 

摘      要：Low-temperature selective catalytic reduction(SCR)is important for the elimination of NOfrom stationary *** the present study,the loading of Ce and W onα-Fe_(2)O_(3)was achieved through the integration of single-mode microwave and incipient wetness impregnation(IWI)*** scanning electron microscopy(SEM)and transmission electron microscopy(TEM)images reveal that the structure ofα-Fe_(2)O_(3)is spindle-like,and the structure remains unchanged after the introduction of Ce and/or *** results of NH-SCR investigation demonstrate that NOconversion over Ce-W/α-Fe_(2)O_(3)is more than85%at 300℃,which is much higher than that over Ce/a-Fe_(2)O_(3)andα-Fe_(2)O_(3),Our studies illustrate that the addition of Ce can significantly increase the amount of surface oxygen vacancies as well as sites of moderate *** the other hand,the addition of W can obviously decrease the amount of basic sites and increase the number of Br?nsted acid *** synergistic effect of Ce and W addition on balancing acidity/basicity properties accounts for the high activity of CeW/α-Fe_(2)O_(3)for NOremoval at low *** study provides insight into the relationship between acidity/basicity properties and catalytic performance of Ce-W/α-Fe_(2)O_(3)catalysts,which is beneficial to the design of high-performance NH-SCR catalyst for NOremoval at low temperatures.