NiB_(2)O_(4)(B=Mn or Co)catalysts for NH_(3)-SCR of NO_(x) at low-temperature in microwave field  

作　　者：Liyun Song Shilin Deng Chunyi Bian Cui Liu Zongcheng Zhan Shuangye Li Jian Li Xing Fan Hong He 

机构地区：[1]Key Laboratory of Beijing on Regional Air Pollution Control,Beijing Key Laboratory for Green Catalysis and Separation,Beijing University of Technology,Beijing 100124,China [2]Qingdao Huashijie Environment Technology Co.,Ltd.,Qingdao 266510,China

出　　处：《Frontiers of Environmental Science & Engineering》2023年第8期57-67,共11页环境科学与工程前沿（英文）

基　　金：supported by the National Natural Science Foundation of China(No.21806005).

摘　　要：Microwave-assisted selective catalytic reduction of nitrogen oxides(NOx)was investigated over Nibased metal oxides.The NiMn2O4 and NiCo_(2)O_(4) catalysts were synthesized by the co-precipitation method and their activities were evaluated as potential candidate catalysts for low-temperature NH_(3)-SCR in a microwave field.The physicochemical properties and structures of the catalysts were characterized by X-ray diffraction(XRD),Scanning electron microscope(SEM),N_(2)-physisorption,NO adsorption-desorption in the microwave field,H2-temperature programmed reduction(H2-TPR)and NH3-temperature programmed desorption(NH_(3)-TPD).The results verified that microwave radiation reduced the reaction temperature required for NH_(3)-SCR compared to conventional heating,which needed less energy.For the NiMn_(2)O_(4) catalyst,the catalytic efficiency exceeded 90%at 70°C and reached 96.8%at 110°C in the microwave field.Meanwhile,the NiMn_(2)O_(4) also exhibited excellent low-temperature NH3-SCR reaction performance under conventional heating conditions,which is due to the high BET specific surface area,more suitable redox property,good NO adsorption-desorption in the microwave field and rich acidic sites.

关 键 词：Microwave field Spinel oxides NO_(x) Selective catalytic reduction 

分 类 号：O643.36[理学—物理化学]