Hydrogenation of nitrobenzene on Au/ZrO2 catalysts

Samuel Gómez, Cecilia Torres, José Luis García Fierro, Carlos R. Apesteguía, Patricio Reyes

Resultado de la investigación: Article

14 Citas (Scopus)

Resumen

The hydrogenation of nitrobenzene at 298K and pressure of 40 bar of H 2 over zirconia supported Au catalysts has been studied. Three different procedures were used to prepare 1wt% of Au/ZrO2 catalysts: i) An impregnation method using HAuCl4 as gold precursor ii)Depositation precipitation of Au nanoparticles generated in the presence of urea and iii) Deposition of Gold nanoparticles generated in presence of cetryltrimethylammonium bromide (CTMABR) as surfactant. The catalysts were characterized by nitrogen adsorption-desorption isotherms at 77 K, XRD, TEM and XPS techniques. The reactions were carried out in a stainless steel batch reactor using ethanol as solvent. The catalysts exhibits a higher selectivity to aniline, with low accumulation of intermediate products. The kinetic study displayed orders 1 respect to hydrogen pressure and to the substrate concentration (nitrobenzene), and the activation energy was 67.2 KJ/mol.

Idioma originalEnglish
Páginas (desde-hasta)1194-1198
Número de páginas5
PublicaciónJournal of the Chilean Chemical Society
Volumen57
N.º2
DOI
EstadoPublished - 1 ene 2012

Huella dactilar

Hydrogenation
Gold
Catalysts
Nanoparticles
Catalyst selectivity
Stainless Steel
Batch reactors
Bromides
Catalyst supports
Surface-Active Agents
Impregnation
Isotherms
Urea
Hydrogen
Desorption
Ethanol
Nitrogen
X ray photoelectron spectroscopy
Activation energy
Transmission electron microscopy

ASJC Scopus subject areas

  • Chemistry(all)

Citar esto

Gómez, Samuel ; Torres, Cecilia ; Fierro, José Luis García ; Apesteguía, Carlos R. ; Reyes, Patricio. / Hydrogenation of nitrobenzene on Au/ZrO2 catalysts. En: Journal of the Chilean Chemical Society. 2012 ; Vol. 57, N.º 2. pp. 1194-1198.
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Hydrogenation of nitrobenzene on Au/ZrO2 catalysts. / Gómez, Samuel; Torres, Cecilia; Fierro, José Luis García; Apesteguía, Carlos R.; Reyes, Patricio.

En: Journal of the Chilean Chemical Society, Vol. 57, N.º 2, 01.01.2012, p. 1194-1198.

Resultado de la investigación: Article

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AU - Gómez, Samuel

AU - Torres, Cecilia

AU - Fierro, José Luis García

AU - Apesteguía, Carlos R.

AU - Reyes, Patricio

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AB - The hydrogenation of nitrobenzene at 298K and pressure of 40 bar of H 2 over zirconia supported Au catalysts has been studied. Three different procedures were used to prepare 1wt% of Au/ZrO2 catalysts: i) An impregnation method using HAuCl4 as gold precursor ii)Depositation precipitation of Au nanoparticles generated in the presence of urea and iii) Deposition of Gold nanoparticles generated in presence of cetryltrimethylammonium bromide (CTMABR) as surfactant. The catalysts were characterized by nitrogen adsorption-desorption isotherms at 77 K, XRD, TEM and XPS techniques. The reactions were carried out in a stainless steel batch reactor using ethanol as solvent. The catalysts exhibits a higher selectivity to aniline, with low accumulation of intermediate products. The kinetic study displayed orders 1 respect to hydrogen pressure and to the substrate concentration (nitrobenzene), and the activation energy was 67.2 KJ/mol.

KW - Gold

KW - Nanoparticles

KW - Nitrobenzene hydrogenation

KW - Zirconia

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