首页|Effect of CeO2 nanoparticle sizes on catalytic performances of sulfated CeO2/Al2O3 catalyst in NH3-SCR reaction

Effect of CeO2 nanoparticle sizes on catalytic performances of sulfated CeO2/Al2O3 catalyst in NH3-SCR reaction

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The sulfated CeO2/Al2O3 catalysts with different sizes of CeO2 nanoparticles were prepared by using pure H2O or acetic acid solution as impregnation solvent,and the influence of sizes of CeO2 nanoparticles on the catalytic performances of the sulfated CeO2/Al2O3 catalyst was studied.The catalytic performance tests show that the sulfated CeO2/Al2O3 catalyst using acetic acid solution as impregnation solvent has better catalytic activity and the resistance to K+poisoning than the sulfated CeO2/Al2O3 catalyst using pure H2O as impregnation solvent.The excellent catalytic performances can be ascribed to the smaller sizes of CeO2 nanoparticles in CeO2/Al2O3 catalyst using acetic acid solution,which results in larger amount of adsorbed sulfate species,surface acid sites,surface active oxygen species and excellent redox property.These features are helpful for improving the catalytic performances of sulfated CeO2/Al2O3 catalyst using smaller amount of CeO2 to cut the costs.

Cerium-based catalystNanoscale effectNH3 selective catalytic reactionSulfation processAlkali metal poisoningRare earths

Zhenghua Hu、Dongqi An、Lei Zhang、Xuping Wang、Siyong Fang、Xinyun Tian、Liu Qiu、Jingfang Sun、Tingzhen Li、Lin Dong

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School of Environmental and Chemical Engineering,Chongqing Three Gorges University,Chongqing,404000,China

Key Laboratory of Water Environment Evolution and Pollution Control in the Three Gorges Reservoir,Chongqing Three Gorges University,Chongqing,404000,China

Jiangsu Key Laboratory of Vehicle Emissions Control,Center of Modem Analysis,Nanjing University,Nanjing,210093,China

National Natural Science Foundation of ChinaScientific and Technological Research Program of Chongqing Municipal Education CommissionScientific and Technological Research Program of Chongqing Municipal Education CommissionOpen Project Program of Key Laboratory of Water Environment Evolution and Pollution Control in the Three Gorges Reservoir

21607019KJQN202101242KJQN202001227WEPKL2019ZD-04

2024

10.1016/j.jre.2023.02.004

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(3)
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