Effect of the Ni/Cu ratio on the composition and catalytic properties of nickel-copper alloy in anisole hydrodeoxygenation

被引:26
|
作者
Smirnov, A. A. [1 ]
Khromova, S. A. [1 ,2 ]
Bulavchenko, O. A. [1 ,2 ]
Kaichev, V. V. [1 ,2 ]
Saraev, A. A. [1 ]
Reshetnikov, S. I. [1 ]
Bykova, M. V. [1 ,2 ]
Trusov, L. I. [3 ]
Yakovlev, V. A. [1 ,2 ]
机构
[1] Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia
[2] Novosibirsk State Univ, Novosibirsk 630090, Russia
[3] Assotsiatsiya Aspekt, Moscow 119571, Russia
关键词
X-RAY PHOTOELECTRON; TEMPERATURE-PROGRAMMED REDUCTION; METHYL-SUBSTITUTED PHENOLS; CU CATALYSTS; NI; HYDROGENATION; OXIDES; XPS; METHANE; DECOMPOSITION;
D O I
10.1134/S0023158414010145
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 activity of NiCu-SiO2 catalysts with a metal content of 90% and different Ni/Cu ratios has been investigated in the hydrodeoxygenation of anisole, a model compound of bio-oil, at 280A degrees C and 6 MPa. A homogeneous phase composition of the active component has been synthesized by the co-decomposition of nickel and copper nitrates followed by the introduction of SiO2 as a stabilizer. The resulting catalysts have been characterized by temperature-programmed reduction, X-ray powder diffraction, X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy combined with energy-dispersive microanalysis. The bulk and surface composition of active-component particles has been determined by XPS and X-ray diffraction. In all of the catalysts containing 15-85 wt % Ni, there are two types of solid solutions. One has a constant composition, Cu0.95Ni0.05, which is independent of the Ni/Cu ratio in the catalyst; in the other, the nickel stoichiometry increases with an increasing Ni content of the active component. A correlation has been established between the Ni/Cu ratio and the rate constants of the reaction examined and between the Ni/Cu ratio and the degree of hydrodeoxygenation for all samples. The most active catalyst is Ni85Cu5-SiO2.
引用
收藏
页码:69 / 78
页数:10
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