Hydrogenation of aromatics over Au-Pd/SiO2-Al2O3 catalysts: support acidity effect (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Hydrogenation of aromatics over Au-Pd/SiO2-Al2O3 catalysts: support acidity effect (Articolo in rivista) (literal)

Anno

• 2004-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1016/j.apcata.2003.12.025 (literal)

Alternative label

• A. M. Venezia; V. La Parola; G. Deganello; B. Pawelec; J. L. G. Fierro (2004)
  Hydrogenation of aromatics over Au-Pd/SiO2-Al2O3 catalysts: support acidity effect
  in Applied catalysis. A, General (Print)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• A. M. Venezia; V. La Parola; G. Deganello; B. Pawelec; J. L. G. Fierro (literal)

Pagina inizio

• 237 (literal)

Pagina fine

• 247 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 260 (literal)

Rivista

• Applied catalysis. A, General (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Istituto per lo Studio dei Materiali Nanostrutturati, ISMN-CNR Sezione di Palermo, via Ugo La Malfa 153, 90146 Palermo, Italy Istituto de Catalysis y Petroleoquimica, CSIC, Campus UAM, Cantoblanco, 28049 Madrid, Spain (literal)

Titolo

• Hydrogenation of aromatics over Au-Pd/SiO2-Al2O3 catalysts: support acidity effect (literal)

Abstract

• Bimetallic Au-Pd catalysts supported on amorphous silica-alumina (ASA) with vary amount of alumina (0, 8, 14, 28 and 100%) were prepared by the simultaneous reduction of palladium and gold precursors by ethanol in the presence of the polyvinylpyrrolidone (PVP). X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses indicated formation of alloyed Au-Pd particles. Measurements of temperature-programmed desorption (TPD) of ammonia were performed to monitor the acid strength and the amount of acid sites on the catalysts after their reduction with 10% H2/Ar at 573K for 1 h. The effect of the support acidity on the catalytic activity was investigated in the simultaneous hydrogenation (HYD) of toluene (T) and naphthalene (NP) in the presence of dibenzothiophene (DBT). The amount of coke formed during the catalytic tests was also determined. Under the selected conditions (P = 5.0MPa, T = 523 K, WHSV = 41.2 h-1), all the catalysts were resistant to poisoning with 113 ppm of S (as DBT). The hydrogenation activity of toluene and the HDS activity of DBT correlate with the concentration of the medium strength acid sites. The enhancement of the HYD activity and the S-tolerance were related to modifications of the electronic properties of the metal atom upon interaction with the acid sites and upon intermetallic interaction. (literal)

Prodotto di

• Istituto per lo studio dei materiali nanostrutturati (ISMN) (Istituto)
• Catalizzatori per l'abbattimento di inquinanti atmosferici (PM.P03.003.001) (Modulo)

Autore CNR

• VALERIA LA PAROLA (Unità di personale interno)
• ANNA VENEZIA (Unità di personale interno)

Incoming links:

Prodotto

• Istituto per lo studio dei materiali nanostrutturati (ISMN) (Istituto)
• Catalizzatori per l'abbattimento di inquinanti atmosferici (PM.P03.003.001) (Modulo)

Autore CNR di

• VALERIA LA PAROLA (Unità di personale interno)
• ANNA VENEZIA (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Applied catalysis. A, General (Rivista)