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Cerium modified MnTiOx/attapulgite catalyst for low-temperature selective catalytic reduction of NOx with NH3

Published online by Cambridge University Press:  27 July 2018

Xiaoyan Huang
Affiliation:
School of Petrochemical Engineering, Changzhou University, Changzhou 213164, People’s Republic of China
Aijuan Xie*
Affiliation:
School of Petrochemical Engineering, Changzhou University, Changzhou 213164, People’s Republic of China
Jiayi Wu
Affiliation:
School of Petrochemical Engineering, Changzhou University, Changzhou 213164, People’s Republic of China
Linjing Xu
Affiliation:
School of Petrochemical Engineering, Changzhou University, Changzhou 213164, People’s Republic of China
Shiping Luo*
Affiliation:
School of Petrochemical Engineering, Changzhou University, Changzhou 213164, People’s Republic of China
Jianwen Xia
Affiliation:
Jiangsu Huayuan Mining Co., Ltd., Changzhou University, Changzhou 213164, People’s Republic of China
Chao Yao
Affiliation:
School of Petrochemical Engineering, Changzhou University, Changzhou 213164, People’s Republic of China
Xiazhang Li
Affiliation:
School of Petrochemical Engineering, Changzhou University, Changzhou 213164, People’s Republic of China
*Corresponding
a)Address all correspondence to these authors. e-mail: aijuan_xie@126.com
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Abstract

Novel cerium-loaded MnTiOx/attapulgite (Ce/MnTiOx/ATP) and cerium-doped MnTiOx/attapulgite (Ce–MnTiOx/ATP) catalysts for low-temperature selective catalytic reduction of nitrogen oxides (NOx) with ammonia (NH3-SCR) were synthesized by co-precipitation methods. The results of catalytic activity testing for the as-prepared Ce–MnTiOx/ATP and Ce/MnTiOx/ATP indicated that the Ce–MnTiOx/ATP catalyst exhibited better catalytic performance with over 80% NOx conversion within a wide temperature window between 170 and 350°, and the highest NOx conversion attained for the Ce–MnTiOx/ATP catalyst was 97.5%. A series of characterization illustrated that the Ce–MnTiOx/ATP catalyst exhibited a higher specific surface area, oxygen vacancy, redox ability, and acid site as compared to that of the Ce/MnTiOx/ATP catalyst. The performance tests showed that the Ce–MnTiOx/ATP catalyst exhibited not only better SO2 & H2O resistance but also higher N2 selectivity and good stability. Therefore, the Ce–MnTiOx/ATP catalyst was testified to be a promising catalyst for NH3-SCR.

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Copyright © Materials Research Society 2018 

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Footnotes

c)

These authors contributed equally to this work.

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Cerium modified MnTiOx/attapulgite catalyst for low-temperature selective catalytic reduction of NOx with NH3
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