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Nano Research 2022, 15(4): 3001-3009 https://doi.org/10.1007/s12274-021-3932-8
Research Article | Issue | Published: 26 November 2021

Cobalt doped Fe-Mn@CNTs catalysts with highly stability for low-temperature selective catalytic reduction of NOx

Show Author's Information Pengfei Li1,  Tiezhen Zhang2,  Haixiao Sun1,  Yufeng Gao1,  Yanyuan Zhang1,  Yuanyuan Liu1,  Chengmin Ge3,  Hao Chen3,  Xiaoping Dai1,  Xin Zhang1( )
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing 102249, China
Petrochina Daqing Petrochemical Research Center, Daqing 163714, China
ShanDong DongYuan New Material Technology Co., Ltd, Dongying 257300, China
Keywords:
metal-organic framework (MOFs), high stability, low-temperature NH3-selective catalytic reduction (SCR) , water and sulfur resistance
Topics:
Catalysis
Cite this article:
Li P, Zhang T, Sun H, et al. Cobalt doped Fe-Mn@CNTs catalysts with highly stability for low-temperature selective catalytic reduction of NOx. Nano Research, 2022, 15(4): 3001-3009. https://doi.org/10.1007/s12274-021-3932-8
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Abstract Full text Electronic supplementary material About this article

In this paper, we report the fabrication of cobalt-doped de-NOx catalyst by pyrolyzing an analogous metal-organic framework-74 (MOF-74) containing Fe & Mn. The resulted catalyst exhibits distinctive microstructures of manganese, cobalt, and iron immobilized on N-doped carbon nanotubes (CNTs). It is found through experiments that the trimetallic catalyst Fe 2Mn1Co0.5/CNTs-50 has the best NH3-selective catalytic reduction (SCR) performance. The Fe2Mn1Co0.5/CNTs-50 exhibited excellent water and sulfur resistance and good stability under the harsh gas environment of 250 °C and/or 170 °C, NO = NH3 = 1,000 ppm, 8 vol.% O2, 20 vol.% H2O, 1,000 ppm SO2, and gas hourly space velocity (GHSV) = 75,000 h−1. The de-NOx conversion was maintained about 55% and 25% after 192 h. The water and sulfur resistance performance were much higher than commercial vanadium series catalyst. The highly water and sulfur resistance performance may be attributed to the unique core–shell microstructure and the synergistic effect of manganese, cobalt, and iron which helps reduce the formation for by-products (NH4HSO4). This study may promote to explore the development of a high stability catalyst for low-temperature selective catalytic reduction of NOx with NH3.


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About this article

Cobalt doped Fe-Mn@CNTs catalysts with highly stability for low-temperature selective catalytic reduction of NOx

Show Author's information Pengfei Li1, Tiezhen Zhang2, Haixiao Sun1, Yufeng Gao1, Yanyuan Zhang1, Yuanyuan Liu1, Chengmin Ge3, Hao Chen3, Xiaoping Dai1, Xin Zhang1( )
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing 102249, China
Petrochina Daqing Petrochemical Research Center, Daqing 163714, China
ShanDong DongYuan New Material Technology Co., Ltd, Dongying 257300, China

Abstract

In this paper, we report the fabrication of cobalt-doped de-NOx catalyst by pyrolyzing an analogous metal-organic framework-74 (MOF-74) containing Fe & Mn. The resulted catalyst exhibits distinctive microstructures of manganese, cobalt, and iron immobilized on N-doped carbon nanotubes (CNTs). It is found through experiments that the trimetallic catalyst Fe 2Mn1Co0.5/CNTs-50 has the best NH3-selective catalytic reduction (SCR) performance. The Fe2Mn1Co0.5/CNTs-50 exhibited excellent water and sulfur resistance and good stability under the harsh gas environment of 250 °C and/or 170 °C, NO = NH3 = 1,000 ppm, 8 vol.% O2, 20 vol.% H2O, 1,000 ppm SO2, and gas hourly space velocity (GHSV) = 75,000 h−1. The de-NOx conversion was maintained about 55% and 25% after 192 h. The water and sulfur resistance performance were much higher than commercial vanadium series catalyst. The highly water and sulfur resistance performance may be attributed to the unique core–shell microstructure and the synergistic effect of manganese, cobalt, and iron which helps reduce the formation for by-products (NH4HSO4). This study may promote to explore the development of a high stability catalyst for low-temperature selective catalytic reduction of NOx with NH3.

Keywords: metal-organic framework (MOFs), high stability, low-temperature NH3-selective catalytic reduction (SCR) , water and sulfur resistance

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Acknowledgements

Publication history

Received: 26 July 2021
Revised: 27 September 2021
Accepted: 29 September 2021
Published: 26 November 2021
Issue date: April 2022

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© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021

Acknowledgements

Acknowledgements

The authors acknowledge financial support from the National Natural Science Foundation of China (No. 21573286) and the Key scientific and technological innovation projects in Shandong Province (No. 2019JZZY010343).

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