Effect of P content in the conversion of guaiacol over Mo/γ-Al 2O3 catalysts

K. Leiva, C. Sepúlveda, R. García, J. L.G. Fierro, G. Aguila, P. Baeza, M. Villarroel, N. Escalona

Resultado de la investigación: Contribución a una revistaArtículo

13 Citas (Scopus)

Resumen

The effect of phosphorus content on Mo/γ-Al2O3 sulfide catalysts for the conversion of 2-methoxyphenol (guaiacol) was studied. The catalysts were prepared by successive impregnation of P (0.5, 1.0, 2.0. 3.0 and 5.0 wt.%) and then Mo (15 wt.%) precursors in excess solvent. The activities of the catalysts were evaluated in the hydrodeoxygenation (HDO) of guaiacol, carried out at 573 K and 5 MPa. The catalysts were characterized by BET surface area, UV-vis-DRS, electrophoretic migration (EM), X-ray Photoelectron Spectroscopy (XPS) and surface acidity techniques. The conversion of guaiacol increased with increase in P content up to 1.0 wt%, and then subsequently decreased at higher loadings. The increase in activity was attributed to the formation of two-dimensional MoS2, while the subsequent decrease was ascribed to loss of active sites resulting from the formation of three-dimensional MoS2. The differences in surface Mo species present on the catalyst were related to the amount of P contents. On the other hand, differences in selectivity, expressed in terms of the phenol/catechol ratio, were mainly influenced by the acid strength of the catalysts.

Idioma originalInglés
Páginas (desde-hasta)568-574
Número de páginas7
PublicaciónApplied Catalysis A: General
Volumen467
DOI
EstadoPublicada - 1 ene 2013
Publicado de forma externa

Áreas temáticas de ASJC Scopus

  • Catálisis
  • Química de procesos y tecnología

Huella Profundice en los temas de investigación de 'Effect of P content in the conversion of guaiacol over Mo/γ-Al <sub>2</sub>O<sub>3</sub> catalysts'. En conjunto forman una huella única.

  • Citar esto

    Leiva, K., Sepúlveda, C., García, R., Fierro, J. L. G., Aguila, G., Baeza, P., Villarroel, M., & Escalona, N. (2013). Effect of P content in the conversion of guaiacol over Mo/γ-Al 2O3 catalysts. Applied Catalysis A: General, 467, 568-574. https://doi.org/10.1016/j.apcata.2013.08.012