The Potential of Cu-SAPO-44 in the Selective Catalytic Reduction of NOx with NH3

Ying Xin; Xiao Wang; Qian Li; Xicheng Ma; Yongxin Qi; Lirong Zheng; James A. Anderson; Zhaoliang Zhang

doi:10.1002/cctc.201601159

The Potential of Cu-SAPO-44 in the Selective Catalytic Reduction of NO_x with NH₃

Ying Xin, Xiao Wang, Qian Li, Xicheng Ma, Yongxin Qi, Lirong Zheng, James A. Anderson, Zhaoliang Zhang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

Nitrogen oxides (NO_x) contribute much to acid rain, photochemical smog, and the depletion of tropospheric ozone. A novel, small-pore Cu-exchanged chabazite (Cu-CHA) zeolite, Cu-SAPO-44, was first studied for the selective catalytic reduction of NO_x with ammonia (NH₃-SCR), and exhibits excellent activity and N₂ selectivity over the wide temperature window from 200–550 °C. The Cu content in Cu-SAPO-44 plays a significant role in the NH₃-SCR reactions. Two kinds of isolated Cu²⁺ species inside the large cages and in the six-membered rings of the CHA structure were verified as the active sites, which are responsible for the low-temperature and high-temperature activity, respectively. Cu-SAPO-44 is shown to be a promising candidate as a SCR catalyst for deNO_x with great potential in after-treatment systems for either mobile or stationary sources.

Original language	English
Pages (from-to)	3740-3745
Number of pages	6
Journal	ChemCatChem
Volume	8
Issue number	24
Early online date	29 Nov 2016
DOIs	https://doi.org/10.1002/cctc.201601159
Publication status	Published - 19 Dec 2016

Bibliographical note

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 21277060, 21477046, and 21547007), and the Open Project from Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials.

Self Archiving policy: http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1867-3899/homepage/2491_onlineopen.html

Keywords

active sites
EXAFS spectroscopy
heterogeneous catalysis
nitrogen oxides
zeolites

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Accepted Manuscript
This is the accepted version of the following article: Y. Xin, X. Wang, Q. Li, X. Ma, Y. Qi, L. Zheng, J. A. Anderson, Z. Zhang, ChemCatChem 2016, 8, 3740., which has been published in final form at doi: 10.1002/cctc.201601159. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy.
Accepted author manuscript, 1.44 MBLicence: Unspecified

Cite this

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abstract = "Nitrogen oxides (NOx) contribute much to acid rain, photochemical smog, and the depletion of tropospheric ozone. A novel, small-pore Cu-exchanged chabazite (Cu-CHA) zeolite, Cu-SAPO-44, was first studied for the selective catalytic reduction of NOx with ammonia (NH3-SCR), and exhibits excellent activity and N2 selectivity over the wide temperature window from 200–550 °C. The Cu content in Cu-SAPO-44 plays a significant role in the NH3-SCR reactions. Two kinds of isolated Cu2+ species inside the large cages and in the six-membered rings of the CHA structure were verified as the active sites, which are responsible for the low-temperature and high-temperature activity, respectively. Cu-SAPO-44 is shown to be a promising candidate as a SCR catalyst for deNOx with great potential in after-treatment systems for either mobile or stationary sources.",

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N2 - Nitrogen oxides (NOx) contribute much to acid rain, photochemical smog, and the depletion of tropospheric ozone. A novel, small-pore Cu-exchanged chabazite (Cu-CHA) zeolite, Cu-SAPO-44, was first studied for the selective catalytic reduction of NOx with ammonia (NH3-SCR), and exhibits excellent activity and N2 selectivity over the wide temperature window from 200–550 °C. The Cu content in Cu-SAPO-44 plays a significant role in the NH3-SCR reactions. Two kinds of isolated Cu2+ species inside the large cages and in the six-membered rings of the CHA structure were verified as the active sites, which are responsible for the low-temperature and high-temperature activity, respectively. Cu-SAPO-44 is shown to be a promising candidate as a SCR catalyst for deNOx with great potential in after-treatment systems for either mobile or stationary sources.

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