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: Research - revisión exhaustivaArticle

  • 8 Citas

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.

IdiomaEnglish
Páginas568-574
Número de páginas7
PublicaciónApplied Catalysis A: General
Volumen467
DOI
EstadoPublished - 2013

Huella dactilar

Guaiacol
Catalysts
Sulfides
Phenol
Acidity
Impregnation
Phosphorus
X ray photoelectron spectroscopy
Acids
catechol
Phenols

Keywords

    ASJC Scopus subject areas

    • Catalysis
    • Process Chemistry and Technology

    Citar esto

    Leiva, K., Sepúlveda, C., García, R., Fierro, J. L. G., Aguila, G., Baeza, P., ... 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. DOI: 10.1016/j.apcata.2013.08.012
    Leiva, K. ; Sepúlveda, C. ; García, R. ; Fierro, J. L.G. ; Aguila, G. ; Baeza, P. ; Villarroel, M. ; Escalona, N./ Effect of P content in the conversion of guaiacol over Mo/γ-Al 2O3 catalysts. En: Applied Catalysis A: General. 2013 ; Vol. 467. pp. 568-574
    @article{1e4b0a8cbf5843d79b6748ae5f667575,
    title = "Effect of P content in the conversion of guaiacol over Mo/γ-Al 2O3 catalysts",
    abstract = "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.",
    keywords = "2-Methoxyphenol, Hydrodeoxygenation, Phosphorus",
    author = "K. Leiva and C. Sepúlveda and R. García and Fierro, {J. L.G.} and G. Aguila and P. Baeza and M. Villarroel and N. Escalona",
    year = "2013",
    doi = "10.1016/j.apcata.2013.08.012",
    volume = "467",
    pages = "568--574",
    journal = "Applied Catalysis A: General",
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    Leiva, K, Sepúlveda, C, García, R, Fierro, JLG, 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, vol. 467, pp. 568-574. DOI: 10.1016/j.apcata.2013.08.012

    Effect of P content in the conversion of guaiacol over Mo/γ-Al 2O3 catalysts. / Leiva, K.; Sepúlveda, C.; García, R.; Fierro, J. L.G.; Aguila, G.; Baeza, P.; Villarroel, M.; Escalona, N.

    En: Applied Catalysis A: General, Vol. 467, 2013, p. 568-574.

    Resultado de la investigación: Research - revisión exhaustivaArticle

    TY - JOUR

    T1 - Effect of P content in the conversion of guaiacol over Mo/γ-Al 2O3 catalysts

    AU - Leiva,K.

    AU - Sepúlveda,C.

    AU - García,R.

    AU - Fierro,J. L.G.

    AU - Aguila,G.

    AU - Baeza,P.

    AU - Villarroel,M.

    AU - Escalona,N.

    PY - 2013

    Y1 - 2013

    N2 - 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.

    AB - 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.

    KW - 2-Methoxyphenol

    KW - Hydrodeoxygenation

    KW - Phosphorus

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    U2 - 10.1016/j.apcata.2013.08.012

    DO - 10.1016/j.apcata.2013.08.012

    M3 - Article

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    JO - Applied Catalysis A: General

    T2 - Applied Catalysis A: General

    JF - Applied Catalysis A: General

    SN - 0926-860X

    ER -

    Leiva K, Sepúlveda C, García R, Fierro JLG, Aguila G, Baeza P y otros. Effect of P content in the conversion of guaiacol over Mo/γ-Al 2O3 catalysts. Applied Catalysis A: General. 2013;467:568-574. Disponible desde, DOI: 10.1016/j.apcata.2013.08.012