Dirección de Investigación Menú

Detalles de Publicación

    Hydrogenation of Nitrobenzene on Au/ZrO2 Catalysts

    • Fecha: 2012
    • Investigador: Samuel Gomez Valdes
    • Publicación ISI: S
    • Publicación SCIELO: N
    • Número de Páginas: 5
    • Volumen: 57
    • Referencia: Gómez, S., Torres, C., García, J., Apesteguía, C. y P. Reyes, "Hydrogenation of Nitrobenzene on Au/ZrO2 Catalysts", J. Chil. Chem. Soc. 57(2), 1194-1198 (2012)
    • Correo electrónico:
    • KeyWords: Gold, nanoparticles, zirconia, nitrobenzene hydrogenation
    • Abstract: The hydrogenation of nitrobenzene al 298K and pressure of 40 bar of H2 over zirconia supported Au catalysis has been studied. Three different procedures were used lo prepare I wt% of Au/ZrO2 catalysts: i) An impregnation method using HAuCI4 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 al 77 K, XRD, TEM and XPS techniques. The reactions were carried out in a stainless steel batch reactor using ethanol as solvent. The catalysts exhibit a higher selectivity to aniline, with low accumulation of intermediate products. The kinetic study displayed orders I respect to hydrogen pressure and to the substrate concentration (nitrobenzene), and the activation energy was 67.2 KJ/mol.


    Hydrogenation of Nitrobenzene on Au/ZrO2 Catalysts

    • Fecha: 2012
    • Investigador: Cecilia Carolina Torres Muñoz
    • Publicación ISI: S
    • Publicación SCIELO: N
    • Número de Páginas: 5
    • Volumen: 57
    • Referencia: Gómez, S., Torres, C., García, J., Apesteguía, C. y P. Reyes, "Hydrogenation of Nitrobenzene on Au/ZrO2 Catalysts", J. Chil. Chem. Soc. 57(2), 1194-1198 (2012)
    • Correo electrónico: CHASQUI
    • KeyWords: Gold, nanoparticles, zirconia, nitrobenzene hydrogenation
    • Abstract: The hydrogenation of nitrobenzene al 298K and pressure of 40 bar of H2 over zirconia supported Au catalysis has been studied. Three different procedures were used lo prepare I wt% of Au/ZrO2 catalysts: i) An impregnation method using HAuCI4 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 al 77 K, XRD, TEM and XPS techniques. The reactions were carried out in a stainless steel batch reactor using ethanol as solvent. The catalysts exhibit a higher selectivity to aniline, with low accumulation of intermediate products. The kinetic study displayed orders I respect to hydrogen pressure and to the substrate concentration (nitrobenzene), and the activation energy was 67.2 KJ/mol.


    Hydrogenation of Nitrobenzene on Au/ZrO2 Catalysts

    • Fecha: 2012
    • Investigador: Patricio Alberto Reyes Núñez
    • Publicación ISI: S
    • Publicación SCIELO: N
    • Número de Páginas: 5
    • Volumen: 57
    • Referencia: Gómez, S., Torres, C., García, J., Apesteguía, C. y P. Reyes, "Hydrogenation of Nitrobenzene on Au/ZrO2 Catalysts", J. Chil. Chem. Soc. 57(2), 1194-1198 (2012)
    • Correo electrónico: preyes@udec.cl
    • KeyWords: Gold, nanoparticles, zirconia, nitrobenzene hydrogenation
    • Abstract: The hydrogenation of nitrobenzene al 298K and pressure of 40 bar of H2 over zirconia supported Au catalysis has been studied. Three different procedures were used lo prepare I wt% of Au/ZrO2 catalysts: i) An impregnation method using HAuCI4 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 al 77 K, XRD, TEM and XPS techniques. The reactions were carried out in a stainless steel batch reactor using ethanol as solvent. The catalysts exhibit a higher selectivity to aniline, with low accumulation of intermediate products. The kinetic study displayed orders I respect to hydrogen pressure and to the substrate concentration (nitrobenzene), and the activation energy was 67.2 KJ/mol.