Effect of calcination temperatures on ammonia selective catalytic oxidation by Cu/SSZ-13 catalysts

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Guo, Jingjing^1^2^3 ; Li, Junhua^1^2^3

School of Environment, Tsinghua University, Beijing, China^1

State Key Joint Laboratory of Environment Simulation and Pollution Control, Beijing, China^2

National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, Beijing, China^3

关键词: Ammonia adsorption;    Ammonia conversion;    Calcination temperature;    Catalytic performance;    Impregnation methods;    Lewis acid site;    Low temperatures;    Selective catalytic oxidation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/5/052001/pdf
DOI  :  10.1088/1755-1315/300/5/052001

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The Cu/SSZ-13 catalysts prepared by the impregnation method were applied to ammonia selective catalytic oxidation (NH3-SCO). The effect of the calcination temperature on the catalytic performance was inverstigated. The structural and physico-chemical properties of the catalysts were investigated by XRD, N2 adsorption-desorption isotherms, XPS, NH3-TPD and H2-TPR. It is found that the increase of calcination temperature favors the ammonia conversion at low temperatures. Meanwhile, overhigh calcination temperature (>500 °C) would lead to the decrease of catalytic activity. The Cu/SSZ-13-500 catalyst shows the highest catalytic performance and exhibits more than 70% NH3 conversion at 200 °C. The NH3-TPD and H2-TPR results confirmed that Cu/SSZ-13-500 owned more Lewis acid sites and CuO species, which were beneficial for ammonia adsorption and activation.