title: Preparation and characterization of NiW-nHA composite catalyst for hydrocracking.
abstract: The synthesis, characterization and catalytic capability of the NiW-nano-hydroxyapatite (NiW-nHA) composite were investigated in this paper. The NiW-nHA catalyst was prepared by a co-precipitation method. Then Fourier transform infrared (FT-IR) spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD) and energy dispersive spectroscopy (EDX) were used to analyze this material. In addition, the catalytic capacity of the NiW-nHA composite was also examined by FT-IR and gas chromatography (GC). The results of FT-IR analysis indicated that Ni, W and nHA combined closely. TEM observation revealed that this catalyst was needle shaped and the crystal retained a nanometer size. XRD data also suggested that a new phase of CaWO(4) appeared and the lattice parameters of nHA changed in this system. nHA was the carrier of metals. The rates of Ni/W-loading were 73.24% and 65.99% according to the EDX data, respectively. Furthermore, the conversion of 91.88% Jatropha oil was achieved at 360 °C and 3 MPa h(-1) over NiW-nHA catalyst. The straight chain alkanes ranging from C(15) to C(18) were the main components in the production. The yield of C(15)-C(18) alkanes was up to 83.56 wt%. The reaction pathway involved hydrocracking of the C═C bonds of these triglycerides from Jatropha oil. This paper developed a novel non-sulfided catalyst to obtain a "green biofuel" from vegetable oil.
authors.affiliation: Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, XueYuan Road No.37, Haidian District, Beijing, 100191, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Zhou
authors.forename: Yongzhao
authors.initials: Y
authors.lastname: Hou
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.forename: Hongru
authors.initials: H
authors.lastname: Liu
authors.forename: Can
authors.initials: C
authors.lastname: Liu
authors.forename: Jing
authors.initials: J
authors.lastname: Liu
authors.forename: Huiting
authors.initials: H
authors.lastname: Qiao
authors.forename: Wenyong
authors.initials: W
authors.lastname: Liu
authors.forename: Yubo
authors.initials: Y
authors.lastname: Fan
authors.forename: Shituan
authors.initials: S
authors.lastname: Shen
authors.forename: Long
authors.initials: L
authors.lastname: Rong
mesh_terms: D000473:Alkanes / Q000737:chemistry; D056804:Biofuels; D002384:Catalysis; D017886:Durapatite / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D010938:Plant Oils / Q000737:chemistry; D014414:Tungsten / Q000737:chemistry*
chemical_list: D000473:Alkanes; D056804:Biofuels; D010938:Plant Oils; D009532:Nickel; D017886:Durapatite; D014414:Tungsten