Promotional effect of Cu additive for the selective catalytic oxidation of n-butylamine over CeZrO_(x)catalyst  

作　　者：Xin Xing Ting Zhao Jie Cheng Xiaoxiao Duan Wenpeng Li Ganggang Li Zhongshen Zhang Zhengping Hao 

机构地区：[1]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 [2]College of Environmental Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China

出　　处：《Chinese Chemical Letters》2022年第6期3065-3072,共8页中国化学快报（英文版）

基　　金：the R&D Program of Beijing Municipal Education Commission(No.KJZD20191443001);Beijing Municipal Science and Technology Commission(No.Z181100000118003);the Fundamental Research Funds for the Central Universities and Doctoral Research Start-up Fund Project of Taiyuan University of Science and Technology(No.20202053)。

摘　　要：The catalytic elimination of nitrogen-containing volatile organic compounds(NVOCs)still encounters bottlenecks in NO_(x)formation and low N_(2)selectivity.Here,a series of Cu-promoted Ce-Zr mixed oxide catalysts were synthesized using a simple precipitation approach,and n-butylamine was adopted as the probe pollutant to evaluate their catalytic performance.The Ce Cu_(10%)ZrO_(x)catalyst exhibited the best catalytic activity,with 100%n-butylamine conversion and 90%N_(2)selectivity at 250℃.Concurrently,this sample also displayed good water resistance.A detailed characterization of the catalyst was performed through a series of experimental studies and theoretical calculations.The addition of Cu increased the redox property and promoted the production of oxygen vacancies,all of which were favorable for the greatest nbutylamine selective catalytic oxidation performance.The changes of oxygen vacancies over Ce Cu_(10%)ZrO_(x)in reaction process were studied by in situ Raman spectra.Moreover,in situ diffuse reflectance infrared Fourier transform spectra(DRIFTs)and theoretical calculations were employed to explore the reaction mechanism of n-butylamine selective oxidation.The high activity and selectivity of this catalyst confirm the practical feasibility of the selective oxidation of n-butylamine to CO_(2)and N_(2),and the exploration of the reaction mechanism provides new insights into the further design of catalysts.

关 键 词：N-BUTYLAMINE CeCu_(a)ZrO_(x)mixed oxide Selective oxidation Oxygen vacancies Reaction mechanism 

分 类 号：X701[环境科学与工程—环境工程] TQ426[化学工程]