Effect of P content in the conversion of guaiacol over Mo/γ-Al2O3 catalysts

被引：25

作者：

Leiva, K. ^{[1
]}

Sepulveda, C. ^{[1
]}

Garcia, R. ^{[1
]}

Fierro, J. L. G. ^{[2
]}

Aguila, G. ^{[3
]}

Baeza, P. ^{[4
]}

Villarroel, M. ^{[5
]}

Escalona, N. ^{[1
]}

机构：

[1] Univ Concepcion, Fac Ciencias Quim, Concepcion, Chile

[2] CSIC, Inst Catalisis & Petroquim, E-28049 Madrid, Spain

[3] Univ Los Andes, Fac Ingn & Ciencias Aplicadas, Santiago, Chile

[4] Pontificia Univ Catolica Valparaiso, Inst Quim, Fac Ciencias, Valparaiso, Chile

[5] Univ Catolica Silva Henriquez, Fac Educ, Santiago, Chile

来源：

APPLIED CATALYSIS A-GENERAL | 2013年 / 467卷

关键词：

Hydrodeoxygenation; 2-Methoxyphenol; MoS2; Phosphorus; MOLYBDENUM ALUMINA CATALYSTS; MO AL2O3 SYSTEMS; HYDROTREATING CATALYSTS; HYDRODESULFURIZATION CATALYSTS; PHOSPHORUS PROMOTION; O-2; CHEMISORPTION; MODEL-COMPOUND; PYROLYSIS OIL; OXIDE FORM; BIO-OILS;

D O I：

10.1016/j.apcata.2013.08.012

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of phosphorus content on Mo/gamma-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. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：568 / 574

页数：7

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