Removal of NO at low temperature and in the absence of ammonia over spherical activated carbon loaded with MnOx-CeO2 and urea

LI Jun; YIN Di; MA Cheng; QIAO Wen-ming; WANG Ji-tong; LING Li-cheng

Volume 46 Issue 6

Jun. 2018

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Article Navigation > Journal of Fuel Chemistry and Technology > 2018 > 46(6): 725-732

LI Jun, YIN Di, MA Cheng, QIAO Wen-ming, WANG Ji-tong, LING Li-cheng. Removal of NO at low temperature and in the absence of ammonia over spherical activated carbon loaded with MnOx-CeO2 and urea[J]. Journal of Fuel Chemistry and Technology, 2018, 46(6): 725-732.

Citation:

LI Jun, YIN Di, MA Cheng, QIAO Wen-ming, WANG Ji-tong, LING Li-cheng. Removal of NO at low temperature and in the absence of ammonia over spherical activated carbon loaded with MnO_x-CeO₂ and urea[J]. Journal of Fuel Chemistry and Technology, 2018, 46(6): 725-732.

Citation:

LI Jun, YIN Di, MA Cheng, QIAO Wen-ming, WANG Ji-tong, LING Li-cheng. Removal of NO at low temperature and in the absence of ammonia over spherical activated carbon loaded with MnO_x-CeO₂ and urea[J]. Journal of Fuel Chemistry and Technology, 2018, 46(6): 725-732.

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Removal of NO at low temperature and in the absence of ammonia over spherical activated carbon loaded with MnO_x-CeO₂ and urea

LI Jun¹,
YIN Di¹,
MA Cheng¹,
QIAO Wen-ming^{1, 2
,
,},
WANG Ji-tong^{1, 3},
LING Li-cheng¹

1.
State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
2.
Key Laboratory of Specially Functional Polymeric Materials and Related Technology Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
3.
Shanghai Huaming Hi-Tech(Group) Co., Ltd, Shanghai 200231, China

Funds:

the National Natural Science Foundation of China U1710252

the National Natural Science Foundation of China U1303291

the National Natural Science Foundation of China 21506061

Young Elite Scientists Sponsorship Program by CAST and Shanghai Rising-Star Program 17QB1401700

More Information

Corresponding author: QIAO Wen-ming, Tel: 021-64253730, E-mail: qiaowm@ecust.edu.cn
Received Date: 2017-05-12
Rev Recd Date: 2018-04-04

Available Online: 2021-01-23

Publish Date: 2018-06-10

Abstract

Abstract

A complex catalyst was prepared by loading MnO_x-CeO₂ and urea on spherical activated carbon (SAC) for the selective catalytic reduction (SCR) of NO at low temperature (30-90 ℃) in the absence of ammonia. The complex catalyst was characterized by scanning electron microscopy-energy dispersive spectrum (SEM-EDS), X-ray diffraction (XRD), and N₂ sorption. The results show that at 30-50 ℃, the micropores of SAC acts as the main active sites for NO adsorption and reaction, whereas at 70-90 ℃, MnO_x-CeO₂ turns to be the main active sites for NO adsorption and reaction; the urea-SCR activity is enhanced by MnO_x-CeO₂ in a wide temperature range. Over the complex catalyst loaded with 8% Mn (the mole ratio of Mn to Ce is 1) and 10% urea, the steady conversion of MO_x reaches 85.6% in the absence of ammonia, under the conditions of 90 ℃, 0.05% NO, 20% O₂ and a space velocity of 6000 h^-1.
- spherical activated carbon,
- MnO_x-CeO₂,
- urea,
- NO,
- selective catalytic reduction

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References(19)

References

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