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Catalysis Letters

, Volume 91, Issue 1–2, pp 115–121 | Cite as

Alkynes Hydrogenation over Pd-Supported Catalysts

  • N. Marín-Astorga
  • G. Pecchi
  • J.L.G. Fierro
  • P. ReyesEmail author
Article

Abstract

The liquid-phase stereoselective hydrogenation of phenyl alkyl acetylenics at 298 K and atmospheric pressure on Pd-supported catalysts has been studied. The catalysts were prepared by impregnation of Pd(acac)2 precursor (1 wt% of Pd) on different siliceous substrates such as amorphous SiO2, mesoporous MCM-41 and silylated MCM-41. The poisoning effect of lead incorporation on the supported palladium was also studied. All the catalysts displayed high selectivity to cis-alkene isomer, with Pd/MCM-41 being the most active catalyst. Deliberately adding lead to the base, palladium catalysts underwent changes in the selectivity to cis-alkene isomer and a significant drop in the activity. All the solids were characterized by nitrogen adsorption–desorption isotherms at 77 K, TGA, TPR, H2 and CO chemisorption, XRD, XPS, and TEM.

palladium MCM-41 phenyl alkyl acetylenics hydrogenation stereoselectivity 

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Copyright information

© Plenum Publishing Corporation 2003

Authors and Affiliations

  • N. Marín-Astorga
    • 1
  • G. Pecchi
    • 1
  • J.L.G. Fierro
    • 2
  • P. Reyes
    • 1
    Email author
  1. 1.Departamento de Fisicoquímica, Facultad de CienciasUniversidad de Concepción, CasillaConcepciónChile
  2. 2.Instituto de Catálisis y PetroleoquímicaCSIC, CantoblancoMadridSpain

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