Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (05): 1243-1251.doi: 10.3866/PKU.WHXB201203081

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Preparation of La-Ni-Mo-B Amorphous Catalyst and Its Catalytic Properties for Hydrodeoxygenation of Phenol

WANG Wei-Yan, ZHANG Xiao-Zhe, YANG Yun-Quan, YANG Yan-Song, PENG Hui-Zuo, LUO He-An   

  1. School of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan Province, P. R. China
  • Received:2012-01-01 Revised:2012-02-27 Published:2012-04-26
  • Contact: YANG Yun-Quan
  • Supported by:

    The project was supported by the Sustentation Fund of Xiangtan University, China (2011XZX11) and Scientific Research Fund of Hunan Provincial Education Department, China (10K062).

Abstract: Lanthanum-promoted Ni-Mo-B amorphous catalysts were prepared by chemical reduction of the corresponding metal salts with sodium borohydride aqueous solution. Scanning electron microscopy (SEM), X-ray diffraction (XRD), inductively coupled plasma atomic emission spectrometry (ICP-AES), and X-ray photoelectron spectroscopy (XPS) were used to characterize the resulting materials. Phenol was used as model compound to test the hydrodeoxygenation (HDO) activity of the La-Ni-Mo-B amorphous catalysts. Adding lanthanum could decrease the particle size, increase the content of Ni0 and promote the reduction of Mo6+ to Mo4+ . But excess lanthanum would cover some of the Ni0, and Mo4+ active sites. The high hydrogenation activity was attributed to the amorphous structure of the catalyst and the high content of Ni0 and the high degree of deoxygenation was attributed to the high content of MoO2. The HDO reation of phenol on the La-Ni-Mo-B amorphous catalyst proceeded with a hydrogenation-dehydration route, thus decreasing the aromatic content of the HDO products. Both the conversion and the total deoxygenation degree were up to 99.0%. The deactivation of the La-Ni-Mo-B amorphous catalysts during the HDO reation of phenol at high temperature was mainly caused by the crystallization of the amorphous structure.

Key words: Amorphous catalyst, La-Ni-Mo-B, Hydrodeoxygenation, Phenol, Bio-oil


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