Catalysts for lean NOx reduction

Structure-property relationship

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

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Effective reduction of NOx to N2 using hydrocarbon in the presence of a high concentration of O2 can be accomplished using Al2O3-supported Co, Ag, or Au catalysts. However, the maximum NO conversion to N2 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/Al203, the maximum NO conversion to N2 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 languageEnglish
Pages (from-to)261-266
Number of pages6
JournalApplied Surface Science
Volume121-122
Publication statusPublished - Nov 1997

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catalysts
Catalysts
Hydrocarbons
hydrocarbons
hydrocarbon combustion
Metals
Crystallite size
metals
Metal ions
metal ions
Thermodynamic properties
Ions
Oxidation
oxidation
ions

Keywords

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

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

Cite this

Kung, M. C., Bethke, K. A., Yan, J., Lee, J. H., & Kung, H. H. (1997). Catalysts for lean NOx reduction: Structure-property relationship. Applied Surface Science, 121-122, 261-266.

Catalysts for lean NOx reduction : Structure-property relationship. / Kung, M. C.; Bethke, K. A.; Yan, J.; Lee, J. H.; Kung, Harold H.

In: Applied Surface Science, Vol. 121-122, 11.1997, p. 261-266.

Research output: Contribution to journalArticle

Kung, MC, Bethke, KA, Yan, J, Lee, JH & Kung, HH 1997, 'Catalysts for lean NOx reduction: Structure-property relationship', Applied Surface Science, vol. 121-122, pp. 261-266.
Kung, M. C. ; Bethke, K. A. ; Yan, J. ; Lee, J. H. ; Kung, Harold H. / Catalysts for lean NOx reduction : Structure-property relationship. In: Applied Surface Science. 1997 ; Vol. 121-122. pp. 261-266.
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