SciELO - Scientific Electronic Library Online

 
vol.57 número2SIMULTANEOUS DETERMINATION OF PIPERACILLIN AND TAZOBACTAM IN THE PHARMACEUTICAL FORMULATION TAZONAM® BY DERIVATIVE SPECTROPHOTOMETRY índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Journal of the Chilean Chemical Society

versão On-line ISSN 0717-9707

Resumo

GOMEZ, SAMUEL et al. HYDROGENATION OF NITROBENZENE ON Au/ZrO2 CATALYSTS. J. Chil. Chem. Soc. [online]. 2012, vol.57, n.2, pp.1194-1198. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072012000200029.

The hydrogenation of nitrobenzene at 298K and pressure of 40 bar of H2 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.

Palavras-chave : Gold; nanoparticles; zirconia; nitrobenzene hydrogenation.

        · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons