Effect of Cu-ZSM-5 catalysts with different CuO particle size on selective catalytic oxidation of N,N-Dimethylformamide  

作　　者：Xin Xing Na Li Dandan Liu Jie Cheng Zhengping Hao 

机构地区：[1]College of Environmental Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China [2]National Engineering Laboratory for VOCs Pollution Control Material&Technology,Research Center for Environmental Material and Pollution Control Technology,University of Chinese Academy of Sciences,Beijing 101408,China

出　　处：《Frontiers of Environmental Science & Engineering》2022年第10期1-10,共10页环境科学与工程前沿（英文）

基　　金：supported by the R&D Program of Bejjing Municipal Education Commission(China)(No.KJZD20191443001);Bejjing Municipal Science and Technology Commission(China)(No.Z181100000118003);the Key R&D Program of Shanxi Province(China)(No.201903D311006);the Doctoral research start up fund project of Taiyuan University of science and technology(China)(Nos.20202053 and 20192039);Research Support for Outstanding Doctors in Shanxi(China)(Nos.20192043 and 20212060);Scientific and Techno-logical Innovation Programs of Higher Education Instiutions in Shanxi(China)(Nos.2021L311 and 2019L0030).

摘　　要：N,N-Dimethylformamide(DMF),a nitrogen-containing volatile organic compound(NVOC)with high emissions from the spray industry,has attracted increasing attention.In this study,Cu-ZSM-5 catalysts with different CuO particle sizes of 3,6,9 and 12 nm were synthesized and tested for DMF selective catalytic oxidation.The crystal structure and physicochemical properties of the catalyst were studied by various characterization methods.The catalytic activity increases with increasing CuO particle size,and complete conversion can be achieved at 300-350℃.The Cu-12 nm catalyst has the highest catalytic activity and can achieve complete conversion at 300℃.The Cu-6 nm sample has the highest N_(2)selectivity at lower temperatures,reaching 95%at 300℃.The activity of the catalysts is determined by the surface CuO cluster species,the bulk CuO species and the chemisorbed surface oxygen species.The high N_(2)selectivity of the catalyst is attributed to the ratio of isolated Cu2+and bulk CuO species,and weak acidity is beneficial to the formation of N_(2).The results in this work will provide a new design of NVOC catalytic oxidation catalysts.

关 键 词：N N-DIMETHYLFORMAMIDE Selective catalytic oxidation CU-ZSM-5 CuO particle size 

分 类 号：O643.36[理学—物理化学]