Citation: Lyumeng Ye, Peng Lu, Dingsheng Chen, Dongyao Chen, Haiwen Wu, Wenjing Dai, Yanling Gan, Jiayong Xiao, Zongwei Xie, Zengwang Li, Haibao Huang. Activity enhancement of acetate precursor prepared on MnO_x-CeO₂ catalyst for low-temperature NH₃-SCR: Effect of gaseous acetone addition[J]. Chinese Chemical Letters, ;2021, 32(8): 2509-2512. doi: 10.1016/j.cclet.2020.12.040 shu

Activity enhancement of acetate precursor prepared on MnO_x-CeO₂ catalyst for low-temperature NH₃-SCR: Effect of gaseous acetone addition

Lyumeng Ye ^{a, b} ,
Peng Lu ^{b, c} ,
Dingsheng Chen ^{b, c} ,
Dongyao Chen ^{b, c} ,
Haiwen Wu ^{b, c} ,
Wenjing Dai ^a ,
Yanling Gan ^a ,
Jiayong Xiao ^d ,
Zongwei Xie ^e ,
Zengwang Li ^d ,
Haibao Huang ^a,,

a.
School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
b.
The Key Laboratory of Water and Air Pollution Control of Guangdong Province, South China Institute of Environmental Sciences, The Ministry of Ecology and Environment of PRC, Guangzhou 510655, China
c.
Guangdong Province Engineering Laboratory for Air Pollution Control, South China Institute of Environmental Sciences, The Ministry of Ecology and Environment of PRC, Guangzhou 510655, China
d.
Zhuhai Jinwan Liangang Foundation Investment Co., Ltd., Zhuhai 519090, China
e.
Hunan Construction Engineering Group, Changsha 410000, China

Corresponding author: Haibao Huang, seabao8@gmail.com
Received Date: 17 October 2020
Revised Date: 24 November 2020
Accepted Date: 23 December 2020
Available Online: 25 December 2020

Figures(4)

MnO_x-CeO₂ catalysts are developed by hydrolysis driving redox method using acetate precursor (3Mn1Ce-Ac) and nitrate precursor (3Mn1Ce-N) for the selective catalytic reduction (SCR) of NO_x by NH₃. A counterpart sample (Cop-3Mn1Ce) was prepared by the NH₃·H₂O co-precipitation method for comparison purpose. Combining the results of physicochemical properties characterization and performance test, we find that the 3Mn1Ce-Ac catalyst with some nanorod structures is highly active for the deNO_x process. The SCR activity of the 3Mn1Ce-Ac catalyst is more admirable than the 3Mn1Ce-N and the Cop-3Mn1Ce catalysts due to plentiful Lewis acid sites, excellent low-temperature reducibility, and superior surface area resulted from O₂ generation during the preparation procedure. The 3Mn1Ce-Ac still exhibits the greatest performance for the deNO_x process when gaseous acetone is in the SCR feed gas. The NO_x conversion and N₂ selectivity over the 3Mn1Ce-Ac are both improved by gaseous acetone above 150 ℃ due to the inhibition of SCR undesired side reactions (NSCR & C-O reactions) and "slow-SCR" process.
- MnO_x-CeO₂ catalyst,
- Hydrolysis driving redox method,
- Low temperature NH₃-SCR,
- Acetate precursor,
- Effect of gaseous acetone
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Activity enhancement of acetate precursor prepared on MnOx-CeO2 catalyst for low-temperature NH3-SCR: Effect of gaseous acetone addition

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通讯作者: 陈斌, bchen63@163.com

Activity enhancement of acetate precursor prepared on MnO_x-CeO₂ catalyst for low-temperature NH₃-SCR: Effect of gaseous acetone addition