Citation: WANG Ming-hong, WANG Liang-liang, LIU Jun, FEI Zhao-yang, CHEN Xian, TANG Ji-hai, CUI Mi-fen, QIAO Xu. Promoting effect of transition metal on low-temperature deNO_x activity of CeO₂@TiO₂ catalyst for selective catalytic reduction[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(4): 497-504. shu

Promoting effect of transition metal on low-temperature deNO_x activity of CeO₂@TiO₂ catalyst for selective catalytic reduction

WANG Ming-hong ^1,2 ,
WANG Liang-liang ^1,2 ,
LIU Jun ^1,2 ,
FEI Zhao-yang ^1,2,*,, ,
CHEN Xian ² ,
TANG Ji-hai ² ,
CUI Mi-fen ² ,
QIAO Xu ^1,2

1.
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
2.
College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China

Corresponding author: FEI Zhao-yang, zhaoyangfei@njtech.edu.cn
Received Date: 30 December 2016
Revised Date: 27 February 2017

Fund Project: the National Natural Science Foundation of China 21306089Innovation Foundation of Jiangsu Province SJLX15-0347

Figures(10)

Transition metal M(M=Mn, Co, Fe and Cu) modified amorphous CeO₂@TiO₂ catalysts were prepared via a spontaneous deposition strategy. The low-temperature deNO_x activity of M-CeO₂@TiO₂ for selective catalytic reduction was investigated. XRD, TEM, N₂ adsorption-desorption, H₂-TPR, NH₃-TPD and in-situ FT-IR were used to study the structure, surface property and low-temperature NH₃-SCR reaction performance of M-CeO₂@TiO₂. The results showed that the M-CeO₂@TiO₂ had better low-temperature oxidation reducibility and more surface acid. Cu doping had the most significant promoting effect on low-temperature deNO_x activity for selective catalytic reduction. During the low-temperature NH₃-SCR reaction, both the L-H and E-R mechanisms existed over the Cu-CeO₂@TiO₂ and the L-H mechanism could play a pivotal role due to the "fast SCR"process.
- transition metals doping,
- amorphous phase,
- selective catalytic reduction,
- low-temperature activity,
- promoting effect
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沈阳化工大学材料科学与工程学院沈阳 110142

Promoting effect of transition metal on low-temperature deNOx activity of CeO2@TiO2 catalyst for selective catalytic reduction

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通讯作者: 陈斌, bchen63@163.com

Promoting effect of transition metal on low-temperature deNO_x activity of CeO₂@TiO₂ catalyst for selective catalytic reduction