Catalytic properties of Ag/Al2O3 catalysts for lean NOx reduction processes and characterisation of active silver species

A. Iglesias-Juez, M. Fernández-García, A. Martínez-Arias, Z. Schay, Zs Koppányb, A. B. Hungría, A. Fuerte, J. A. Anderson, J. C. Conesa, J. Soria

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A study of the lean NOx reduction activity employing different reductants over Ag/Al2O3 samples prepared from reverse microemulsions or impregnation with EDTA-complexes was carried out. A multitechnique approach was employed for characterization of the samples and/or processes taking place in the course of the NOx-SCR reaction with propylene and propane. In agreement with previous reports, the higher activity of samples with intermediate Ag loadings with samples prepared from silver-EDTA complexes presented slightly higher overall activities for the selective process. The main path for propylene activation was in the formation of acrylate-type species. The nature of Ag sites active for the SCR process was related to well dispersed silver aluminate-like phases with tetrahedral local symmetry and a relatively high disorder in the oxygen first shell.

Original languageEnglish
Pages (from-to)65-70
Number of pages6
JournalTopics in Catalysis
Volume30-31
Publication statusPublished - Jul 2004

Fingerprint

Ethylenediaminetetraacetic acid
Thyristors
Silver
Edetic Acid
Propylene
silver
catalysts
silicon controlled rectifiers
Propane
Catalysts
ethylenediaminetetraacetic acids
Reducing Agents
Microemulsions
propylene
Impregnation
Chemical activation
Oxygen
acrylates
propane
activation

Keywords

  • Ag/AlO catalysts
  • In situ-DRIFTS
  • NO-HC-SCR
  • UV-vis
  • XAFS

ASJC Scopus subject areas

  • Catalysis
  • Chemistry (miscellaneous)
  • Physical and Theoretical Chemistry

Cite this

Iglesias-Juez, A., Fernández-García, M., Martínez-Arias, A., Schay, Z., Koppányb, Z., Hungría, A. B., ... Soria, J. (2004). Catalytic properties of Ag/Al2O3 catalysts for lean NOx reduction processes and characterisation of active silver species. Topics in Catalysis, 30-31, 65-70.

Catalytic properties of Ag/Al2O3 catalysts for lean NOx reduction processes and characterisation of active silver species. / Iglesias-Juez, A.; Fernández-García, M.; Martínez-Arias, A.; Schay, Z.; Koppányb, Zs; Hungría, A. B.; Fuerte, A.; Anderson, J. A.; Conesa, J. C.; Soria, J.

In: Topics in Catalysis, Vol. 30-31, 07.2004, p. 65-70.

Research output: Contribution to journalArticle

Iglesias-Juez, A, Fernández-García, M, Martínez-Arias, A, Schay, Z, Koppányb, Z, Hungría, AB, Fuerte, A, Anderson, JA, Conesa, JC & Soria, J 2004, 'Catalytic properties of Ag/Al2O3 catalysts for lean NOx reduction processes and characterisation of active silver species', Topics in Catalysis, vol. 30-31, pp. 65-70.
Iglesias-Juez A, Fernández-García M, Martínez-Arias A, Schay Z, Koppányb Z, Hungría AB et al. Catalytic properties of Ag/Al2O3 catalysts for lean NOx reduction processes and characterisation of active silver species. Topics in Catalysis. 2004 Jul;30-31:65-70.
Iglesias-Juez, A. ; Fernández-García, M. ; Martínez-Arias, A. ; Schay, Z. ; Koppányb, Zs ; Hungría, A. B. ; Fuerte, A. ; Anderson, J. A. ; Conesa, J. C. ; Soria, J. / Catalytic properties of Ag/Al2O3 catalysts for lean NOx reduction processes and characterisation of active silver species. In: Topics in Catalysis. 2004 ; Vol. 30-31. pp. 65-70.
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