The role of active sites of CoH-ZSM-5 catalysts for the C2H 4-SCR of NO

Xiaomei Chen; Aimin Zhu; Chak Tong AU; Xuefeng Yang; Chuan Shi

doi:10.1007/s10562-010-0270-y

The role of active sites of CoH-ZSM-5 catalysts for the C₂H ₄-SCR of NO

Xiaomei Chen, Aimin Zhu, Chak Tong AU, Xuefeng Yang, Chuan Shi^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

5 Citations (Scopus)

Abstract

The selective catalytic reduction of NO with ethylene was investigated and compared over fresh CoH-ZSM-5, H₂-reduced (450 °C) CoH-ZSM-5 and H-ZSM-5. The dispersion of cobalt species for fresh and H₂-reduced CoH-ZSM-5 was studied by UV-vis and FTIR spectra. Combined with DRIFTS results of ad-species and reaction experiments, the active sites of CoH-ZSM-5 for the C₂H₄-SCR were identified and the catalytic functions of active cobalt species and support were also clarified. Notably, the formation of -CN or -NCO species was heavily dependent on the type of nitrates. Co ₃O₄ particles contributed to the oxidation of NO to bidentate nitrates. The latter species were crucial for the formation of -NCO. Whereas exchanged Co²⁺ ions facilitated the oxidation of NO to monodentate and/or bridged nitrates which participated in the formation of -CN species.

Original language	English
Pages (from-to)	182-189
Number of pages	8
Journal	Catalysis Letters
Volume	135
Issue number	3-4
DOIs	https://doi.org/10.1007/s10562-010-0270-y
Publication status	Published - Apr 2010

Scopus Subject Areas

Catalysis
Chemistry(all)

User-Defined Keywords

Active sites
CoH-ZSM-5
DRIFTS
Ethylene
NO selective catalytic reduction

Access to Document

10.1007/s10562-010-0270-y

Cite this

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title = "The role of active sites of CoH-ZSM-5 catalysts for the C2H 4-SCR of NO",

abstract = "The selective catalytic reduction of NO with ethylene was investigated and compared over fresh CoH-ZSM-5, H2-reduced (450 °C) CoH-ZSM-5 and H-ZSM-5. The dispersion of cobalt species for fresh and H2-reduced CoH-ZSM-5 was studied by UV-vis and FTIR spectra. Combined with DRIFTS results of ad-species and reaction experiments, the active sites of CoH-ZSM-5 for the C2H4-SCR were identified and the catalytic functions of active cobalt species and support were also clarified. Notably, the formation of -CN or -NCO species was heavily dependent on the type of nitrates. Co 3O4 particles contributed to the oxidation of NO to bidentate nitrates. The latter species were crucial for the formation of -NCO. Whereas exchanged Co2+ ions facilitated the oxidation of NO to monodentate and/or bridged nitrates which participated in the formation of -CN species.",

keywords = "Active sites, CoH-ZSM-5, DRIFTS, Ethylene, NO selective catalytic reduction",

author = "Xiaomei Chen and Aimin Zhu and AU, {Chak Tong} and Xuefeng Yang and Chuan Shi",

note = "Funding Information: Acknowledgments The work is supported by the National Natural Science Foundation of China (Grant No. 20673016) and Program for New Century Excellent Talents in University (NCET-07-0136), as well as by the National High Technology and Development Program (863 program) of China (Grant No. 2007AA06Z311).",

year = "2010",

month = apr,

doi = "10.1007/s10562-010-0270-y",

language = "English",

volume = "135",

pages = "182--189",

journal = "Catalysis Letters",

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T1 - The role of active sites of CoH-ZSM-5 catalysts for the C2H 4-SCR of NO

AU - Chen, Xiaomei

AU - Zhu, Aimin

AU - AU, Chak Tong

AU - Yang, Xuefeng

AU - Shi, Chuan

N1 - Funding Information: Acknowledgments The work is supported by the National Natural Science Foundation of China (Grant No. 20673016) and Program for New Century Excellent Talents in University (NCET-07-0136), as well as by the National High Technology and Development Program (863 program) of China (Grant No. 2007AA06Z311).

PY - 2010/4

Y1 - 2010/4

N2 - The selective catalytic reduction of NO with ethylene was investigated and compared over fresh CoH-ZSM-5, H2-reduced (450 °C) CoH-ZSM-5 and H-ZSM-5. The dispersion of cobalt species for fresh and H2-reduced CoH-ZSM-5 was studied by UV-vis and FTIR spectra. Combined with DRIFTS results of ad-species and reaction experiments, the active sites of CoH-ZSM-5 for the C2H4-SCR were identified and the catalytic functions of active cobalt species and support were also clarified. Notably, the formation of -CN or -NCO species was heavily dependent on the type of nitrates. Co 3O4 particles contributed to the oxidation of NO to bidentate nitrates. The latter species were crucial for the formation of -NCO. Whereas exchanged Co2+ ions facilitated the oxidation of NO to monodentate and/or bridged nitrates which participated in the formation of -CN species.

AB - The selective catalytic reduction of NO with ethylene was investigated and compared over fresh CoH-ZSM-5, H2-reduced (450 °C) CoH-ZSM-5 and H-ZSM-5. The dispersion of cobalt species for fresh and H2-reduced CoH-ZSM-5 was studied by UV-vis and FTIR spectra. Combined with DRIFTS results of ad-species and reaction experiments, the active sites of CoH-ZSM-5 for the C2H4-SCR were identified and the catalytic functions of active cobalt species and support were also clarified. Notably, the formation of -CN or -NCO species was heavily dependent on the type of nitrates. Co 3O4 particles contributed to the oxidation of NO to bidentate nitrates. The latter species were crucial for the formation of -NCO. Whereas exchanged Co2+ ions facilitated the oxidation of NO to monodentate and/or bridged nitrates which participated in the formation of -CN species.

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