Selective reduction of nitric oxide by methane on cobalt-ion-exchanged synthetic clinoptilolite zeolite in oxygen-rich atmosphere

Young Gon Kim; Young Chai Kim; Suk Bong Hong; Myung Hun Kim; Yong Pyo Kim; Young Sun Uh

doi:10.1023/A:1019032623674

Selective reduction of nitric oxide by methane on cobalt-ion-exchanged synthetic clinoptilolite zeolite in oxygen-rich atmosphere

Young Gon Kim, Young Chai Kim, Suk Bong Hong, Myung Hun Kim, Yong Pyo Kim, Young Sun Uh

Department of Chemical Engineering & Materials Science

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

12 Scopus citations

Abstract

Selective reduction of NO by CH₄ in the presence of excess O₂ has been studied on cobalt-ion-exchanged synthetic clinoptilolite (Co-CLI) zeolite. The catalytic results are compared with those obtained from Co-ZSM-5 and Co-FER, the two most widely studied catalysts for this reaction. At T ≥ 500 °C, Co-CLI is much more active for NO reduction than Co-ZSM-5, but it is less active than Co-FER. However, it is found that the selectivity for CH₄ toward reacting with NO at high temperatures (T ≥ 450 °C) is higher on Co-CLI than on Co-ZSM-5 or Co-FER. On the basic of the overall catalytic results, the importance of zeolite pore size as a structural parameter influencing the activity of intrazeolitic Co²⁺ ions for NO reduction by CH₄ is discussed.

Original language	English
Pages (from-to)	179-185
Number of pages	7
Journal	Catalysis Letters
Volume	57
Issue number	4
DOIs	https://doi.org/10.1023/A:1019032623674
State	Published - Mar 1999

Bibliographical note

Funding Information:
Support of this work was provided by the Korea Institute of Science and Technology (KIST). SBH thanks Drs. S.W. Nam and S.A. Hong of KIST for the use of their CO2 gas analyzer.

Keywords

CH
Cobalt
NO reduction
Synthetic clinoptilolite
Zeolite pore structure

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title = "Selective reduction of nitric oxide by methane on cobalt-ion-exchanged synthetic clinoptilolite zeolite in oxygen-rich atmosphere",

abstract = "Selective reduction of NO by CH4 in the presence of excess O2 has been studied on cobalt-ion-exchanged synthetic clinoptilolite (Co-CLI) zeolite. The catalytic results are compared with those obtained from Co-ZSM-5 and Co-FER, the two most widely studied catalysts for this reaction. At T ≥ 500 °C, Co-CLI is much more active for NO reduction than Co-ZSM-5, but it is less active than Co-FER. However, it is found that the selectivity for CH4 toward reacting with NO at high temperatures (T ≥ 450 °C) is higher on Co-CLI than on Co-ZSM-5 or Co-FER. On the basic of the overall catalytic results, the importance of zeolite pore size as a structural parameter influencing the activity of intrazeolitic Co2+ ions for NO reduction by CH4 is discussed.",

keywords = "CH, Cobalt, NO reduction, Synthetic clinoptilolite, Zeolite pore structure",

author = "Kim, {Young Gon} and Kim, {Young Chai} and Hong, {Suk Bong} and Kim, {Myung Hun} and Kim, {Yong Pyo} and Uh, {Young Sun}",

note = "Funding Information: Support of this work was provided by the Korea Institute of Science and Technology (KIST). SBH thanks Drs. S.W. Nam and S.A. Hong of KIST for the use of their CO2 gas analyzer.",

year = "1999",

month = mar,

doi = "10.1023/A:1019032623674",

language = "English",

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pages = "179--185",

journal = "Catalysis Letters",

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T1 - Selective reduction of nitric oxide by methane on cobalt-ion-exchanged synthetic clinoptilolite zeolite in oxygen-rich atmosphere

AU - Kim, Young Gon

AU - Kim, Young Chai

AU - Hong, Suk Bong

AU - Kim, Myung Hun

AU - Kim, Yong Pyo

AU - Uh, Young Sun

N1 - Funding Information: Support of this work was provided by the Korea Institute of Science and Technology (KIST). SBH thanks Drs. S.W. Nam and S.A. Hong of KIST for the use of their CO2 gas analyzer.

PY - 1999/3

Y1 - 1999/3

N2 - Selective reduction of NO by CH4 in the presence of excess O2 has been studied on cobalt-ion-exchanged synthetic clinoptilolite (Co-CLI) zeolite. The catalytic results are compared with those obtained from Co-ZSM-5 and Co-FER, the two most widely studied catalysts for this reaction. At T ≥ 500 °C, Co-CLI is much more active for NO reduction than Co-ZSM-5, but it is less active than Co-FER. However, it is found that the selectivity for CH4 toward reacting with NO at high temperatures (T ≥ 450 °C) is higher on Co-CLI than on Co-ZSM-5 or Co-FER. On the basic of the overall catalytic results, the importance of zeolite pore size as a structural parameter influencing the activity of intrazeolitic Co2+ ions for NO reduction by CH4 is discussed.

AB - Selective reduction of NO by CH4 in the presence of excess O2 has been studied on cobalt-ion-exchanged synthetic clinoptilolite (Co-CLI) zeolite. The catalytic results are compared with those obtained from Co-ZSM-5 and Co-FER, the two most widely studied catalysts for this reaction. At T ≥ 500 °C, Co-CLI is much more active for NO reduction than Co-ZSM-5, but it is less active than Co-FER. However, it is found that the selectivity for CH4 toward reacting with NO at high temperatures (T ≥ 450 °C) is higher on Co-CLI than on Co-ZSM-5 or Co-FER. On the basic of the overall catalytic results, the importance of zeolite pore size as a structural parameter influencing the activity of intrazeolitic Co2+ ions for NO reduction by CH4 is discussed.

KW - CH

KW - Cobalt

KW - NO reduction

KW - Synthetic clinoptilolite

KW - Zeolite pore structure

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DO - 10.1023/A:1019032623674

M3 - Article

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SN - 1011-372X

VL - 57

SP - 179

EP - 185

JO - Catalysis Letters

JF - Catalysis Letters

IS - 4

ER -

Selective reduction of nitric oxide by methane on cobalt-ion-exchanged synthetic clinoptilolite zeolite in oxygen-rich atmosphere

Abstract

Bibliographical note

Keywords

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