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.

Development of nickel based catalysts for the transformation of natural triglycerides and related compounds into green diesel: a critical review

“…In view of the above the effort to develop NiMo, CoMo or NiW non-sulfided catalysts supported on γ-alumina with an activity similar to the corresponding sulfided catalysts seems to be plausible. In this context interesting contributions devoted to the improvement of the catalytic behavior of the reduced form of the aforementioned catalysts have been recently reported mainly by Professor Rong group [181][182][183][185][186][187][188]. This is mainly attempted by introducing additional phases in the catalyst formulations (Table 5).…”

“…Recently, the Rong research group experienced with NiW and Ni-HPW catalysts supported on nano-hydroxyapatite [187,188]. First, a NiW-nano-hydroxyapatite (NiW-nHA) catalyst was prepared by a co-precipitation (Table 5, entry 5).…”

“…High conversion of Jatropha oil was achieved over this catalyst mainly to straight chain alkanes ranging from C 15 to C 18 . The reaction pathway involved hydrocracking of the C C bonds of the Jatropha oil triglycerides [187].…”

The Risk Evaluation of Tungsten Oxide Nanoparticles in Cultured Rat Liver Cells for Its Safe Applications in Nanotechnology

“…Furthermore neurotoxic (Shan et al 2012) and dermal toxic (Zhang et al 2010) effects by tungsten contained NPs have also been reported. In recent years, tungsten containing nanomaterials due to their big surfaces have attracted a dramatic and exponentially increasing interest in nanotechnological products (Zhou et al 2012). …”

Enhanced dissolution and stability of Tanshinone IIA base by solid dispersion system with nano-hydroxyapatite

“…[21] n-HAp has also received significant attention for application in medicine and dentistry. [222324] However, there are currently no reports on the application of n-HAp as a carrier in SD formulations.…”