Catalysts for lean NO                         x                          reduction: Structure-property relationship

M. C. Kung; K. A. Bethke; J. Yan; J. H. Lee; H. H. Kung

doi:10.1016/S0169-4332(97)00302-4

Catalysts for lean NO _x reduction: Structure-property relationship

M. C. Kung, K. A. Bethke, J. Yan, J. H. Lee, H. H. Kung^*

^*Corresponding author for this work

Chemical and Biological Engineering

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

48 Scopus citations

Abstract

Effective reduction of NO _x to N ₂ using hydrocarbon in the presence of a high concentration of O ₂ can be accomplished using Al ₂ O ₃ -supported Co, Ag, or Au catalysts. However, the maximum NO conversion to N ₂ is higher on catalysts of lower metal loadings in the case of Co and Ag, which is due to the fact that the metal ions in these catalysts are more dispersed and more difficult to undergo redox than ions in catalysts of higher metal loadings. In the case of Au/Al ₂ 0 ₃ , the maximum NO conversion to N ₂ depends on the crystallite size of Au. The effect of the presence of NO on the hydrocarbon oxidation reaction depends on the combustion activity of the catalysts: NO suppresses hydrocarbon combustion on more active combustion catalysts but facilitates it on less active ones.

Original language	English (US)
Pages (from-to)	261-266
Number of pages	6
Journal	Applied Surface Science
Volume	121-122
DOIs	https://doi.org/10.1016/S0169-4332(97)00302-4
State	Published - Nov 1997

Keywords

Ag/alumina
Alumina-supported catalysts
Au/alumina
Co/alumina catalyst
Lean NO reduction
NO reduction

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Physics and Astronomy(all)
Surfaces and Interfaces
Surfaces, Coatings and Films

Access to Document

10.1016/S0169-4332(97)00302-4

Cite this

@article{ed985841af964f5a920a50569e254932,

title = "Catalysts for lean NO x reduction: Structure-property relationship",

abstract = " Effective reduction of NO x to N 2 using hydrocarbon in the presence of a high concentration of O 2 can be accomplished using Al 2 O 3 -supported Co, Ag, or Au catalysts. However, the maximum NO conversion to N 2 is higher on catalysts of lower metal loadings in the case of Co and Ag, which is due to the fact that the metal ions in these catalysts are more dispersed and more difficult to undergo redox than ions in catalysts of higher metal loadings. In the case of Au/Al 2 0 3 , the maximum NO conversion to N 2 depends on the crystallite size of Au. The effect of the presence of NO on the hydrocarbon oxidation reaction depends on the combustion activity of the catalysts: NO suppresses hydrocarbon combustion on more active combustion catalysts but facilitates it on less active ones.",

keywords = "Ag/alumina, Alumina-supported catalysts, Au/alumina, Co/alumina catalyst, Lean NO reduction, NO reduction",

author = "Kung, {M. C.} and Bethke, {K. A.} and J. Yan and Lee, {J. H.} and Kung, {H. H.}",

note = "Funding Information: Support of this research by the U.S. Department of Energy, GM Corporation and Ford Motors Company, and experimental assistance from D. Rossing and A. Chu-Kung are gratefully acknowledged.",

year = "1997",

month = nov,

doi = "10.1016/S0169-4332(97)00302-4",

language = "English (US)",

volume = "121-122",

pages = "261--266",

journal = "Applied Surface Science",

issn = "0169-4332",

publisher = "Elsevier",

}

TY - JOUR

T1 - Catalysts for lean NO x reduction

T2 - Structure-property relationship

AU - Kung, M. C.

AU - Bethke, K. A.

AU - Yan, J.

AU - Lee, J. H.

AU - Kung, H. H.

N1 - Funding Information: Support of this research by the U.S. Department of Energy, GM Corporation and Ford Motors Company, and experimental assistance from D. Rossing and A. Chu-Kung are gratefully acknowledged.

PY - 1997/11

Y1 - 1997/11

N2 - Effective reduction of NO x to N 2 using hydrocarbon in the presence of a high concentration of O 2 can be accomplished using Al 2 O 3 -supported Co, Ag, or Au catalysts. However, the maximum NO conversion to N 2 is higher on catalysts of lower metal loadings in the case of Co and Ag, which is due to the fact that the metal ions in these catalysts are more dispersed and more difficult to undergo redox than ions in catalysts of higher metal loadings. In the case of Au/Al 2 0 3 , the maximum NO conversion to N 2 depends on the crystallite size of Au. The effect of the presence of NO on the hydrocarbon oxidation reaction depends on the combustion activity of the catalysts: NO suppresses hydrocarbon combustion on more active combustion catalysts but facilitates it on less active ones.

AB - Effective reduction of NO x to N 2 using hydrocarbon in the presence of a high concentration of O 2 can be accomplished using Al 2 O 3 -supported Co, Ag, or Au catalysts. However, the maximum NO conversion to N 2 is higher on catalysts of lower metal loadings in the case of Co and Ag, which is due to the fact that the metal ions in these catalysts are more dispersed and more difficult to undergo redox than ions in catalysts of higher metal loadings. In the case of Au/Al 2 0 3 , the maximum NO conversion to N 2 depends on the crystallite size of Au. The effect of the presence of NO on the hydrocarbon oxidation reaction depends on the combustion activity of the catalysts: NO suppresses hydrocarbon combustion on more active combustion catalysts but facilitates it on less active ones.

KW - Ag/alumina

KW - Alumina-supported catalysts

KW - Au/alumina

KW - Co/alumina catalyst

KW - Lean NO reduction

KW - NO reduction

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VL - 121-122

SP - 261

EP - 266

JO - Applied Surface Science

JF - Applied Surface Science

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