YANG Yong-ning1, 2, ZHANG Huai-ke1,3, LÜ En-jing3, ZHANG Cheng-hua1,3, REN Jie1,3*
(1 Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, Shanxi, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 10049, China; 3 Synfuels China Corporation Limited, Taiyuan 030032, Shanxi, China)
Abstract: A series of supported NiM/γ-Al2O3 (M= Fe, Mo) catalysts was prepared and characterized by nitrogen physisorption, H2 temperature-programmed reduction (TPR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and H2 or NH3 temperature-programmed desorption (H2-TPD or NH3-TPD) techniques. The catalytic performances of the catalysts in the hydrodeoxygenation of acetic acid were systematically investigated in a fixed-bed reactor. The dispersion and reduction of NiO in Ni/γ-Al2O3 catalyst was remarkably improved by addition of Mo or Fe, which may lead to a high catalytic activity. Over Ni/γ-Al2O3 catalyst, the formation of acetic ester was favoured at low temperature, while the domain product was methane resulting from the C–C bond dissociation at high temperature. The C–C bond dissociation capability of Ni/γ-Al2O3 catalyst was suppressed by addition of Fe, and a high yield of ethanol was observed over at Ni-Fe/γ-Al2O3 catalyst low temperature. A higher yield of ethane was obtained over Ni-Mo/γ-Al2O3 catalyst as the surface acidity of the catalyst was improved by addition of Mo.
Key words: Ni-based catalyst; acetic acid; Fischer-Tropsch syncrude; bio-oil; hydrodeoxygenation
E-mail: renjie@sxicc.ac.cn
Journal of Molecular Catalysis, Vol. 25, Issue 1, 2011, 30~36.
