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MnFeTiOx/attapulgite catalysts with excellent potassium resistance for SCR of NOx with NH3 at low temperatures

Published online by Cambridge University Press:  26 February 2019

Yiran Tang
Affiliation:
School of Petrochemical Engineering, Changzhou University, Changzhou 213164, People’s Republic of China
Yiyang Tao
Affiliation:
School of Fine Arts, Nanjing Normal University, Nanjing 210046, 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
Xiaoyan Huang
Affiliation:
School of Petrochemical Engineering, Changzhou University, Changzhou 213164, People’s Republic of China
Xingmeng Zhou
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
Shiping Luo*
Affiliation:
School of Petrochemical Engineering, 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

A series of metal oxides (MnFeOx, MnCrOx, MnTiOx, and MnFeTiOx) supported on attapulgite (ATP) were synthesized by coprecipitation for the low-temperature selective catalytic reduction (SCR) of NOx with NH3. Then, they were subjected to appropriate characterizations for their properties (XRD, TEM, BET, XPS, etc.). The catalytic activity of MnFeTiOx/ATP catalyst was over 95% NOx conversion within a wide temperature window between of 175 and 300 °C, and 88% N2 selectivity. Moreover, MnFeTiOx/ATP presented excellent potassium resistance relative to the traditional V–W–Ti catalyst, and its denitration performance was significantly improved. The NOx conversion rate could be restored to nearly 90% at 210 °C after removing potassium via washing of K–MnFeTiOx/ATP. In addition, the MnFeTiOx/ATP showed better SO2 resistance and stability than the traditional V–W–Ti catalyst. Therefore, the MnFeTiOx/ATP catalyst has been proved to have broad prospects in NH3-SCR.

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Copyright © Materials Research Society 2019 

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Footnotes

c)

These authors contributed equally to this work.

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MnFeTiOx/attapulgite catalysts with excellent potassium resistance for SCR of NOx with NH3 at low temperatures
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