Synergistic effects of Cu species and acidity of Cu-ZSM-5 on catalytic performance for selective catalytic oxidation of n-butylamine  

作　　者：Xin Xing Na Li Jie Cheng Yonggang Sun Zhongshen Zhang Xin Zhang Zhengping Hao 

机构地区：[1]Key Laboratory of Environmental Nanotechnology and Health Effects,Research Center for Eco-Enuironmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [2]National Engineering Laboratory/or VOCs Pollution Control Material&Technology,Research Center/or Environmental Material and Pollution Control Technology,University of Chinese Academy of Sciences,Beijing 101408,China

出　　处：《Journal of Environmental Sciences》2020年第10期55-63,共9页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 21477149,21677160,and 21707152);Beijing Municipal Science and Technology Commission (Nos. Z181100000118003 and Z181100005418011)。

摘　　要：In this work, a series of Cu-ZSM-5 catalysts with different SiO2/Al2O3 ratios(25, 50, 100 and200) were synthesized and investigated in n-butylamine catalytic degradation. The n-butylamine can be completely catalytic degradation at 350 ℃ over all Cu-ZSM-5 catalysts. Moreover, Cu-ZSM-5(25) exhibited the highest selectivity to N2, exceeding 90% at 350 ℃. These samples were investigated in detail by several characterizations to illuminate the dependence of the catalytic performance on redox properties, Cu species, and acidity. The characterization results proved that the redox properties and chemisorption oxygen primarily affect n-butylamine conversion. N2 selectivity was impacted by the Bronsted acidity and the isolated Cu^2+ species. Meanwhile, the surface acid sites over Cu-ZSM-5 catalysts could influence the formation of Cu species. Furthermore, in situ diffuse reflectance infrared Fourier transform spectra was adopted to explore the reaction mechanism. The Cu-ZSM-5 catalysts are the most prospective catalysts for nitrogen-containing volatile organic compounds removal, and the results in this study could provide new insights into catalysts design for VOC catalytic oxidation.

关 键 词：CH3CH2CH2CH2NH2 Selective oxidation CU-ZSM-5 Cu species Acid sites 

分 类 号：X701[环境科学与工程—环境工程]