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Yin H.-L.,China University of Petroleum - East China | Zhou T.-N.,Environmental Protection Agency of Dongying | Yao Y.-Y.,China University of Petroleum - East China
Jiegou Huaxue | Year: 2015

A new complex, [Ni(H2O)6][Mo2O2S2(edta)]·2H2O (1, edta = ethylenediaminetetraacetate), which was partially-sulfided, was synthesized and characterized by single-crystal X-ray diffraction. Compound 1 belongs to the monoclinic system, C2/c space group with a = 7.1844(2), b = 12.5626(4), c = 27.0201(8) Å, β = 93.066(3), V = 2435.21(14) Å3, C10H28S2Mo2N2NiO18, Mr = 779.02, Dc = 2.1247 g/cm3, μ(MoKα) = 2.035 mm-1, F(000) = 1550, Z = 4, the final R = 0.0366 and wR = 0.0656 for 5359 observed reflections (I > 2σ(I)). There are one isolated [Ni(H2O)6]2+ cation and one [Mo2O2S2(edta)]2-anion in its asymmetric unit, and they are connected through multiple hydrogen bonds to generate a 3D network. In addition, the thermal behavior of compound 1 and the hydrodesulfurization activity of the catalyst derived from compound 1 were studied. Source


Yin H.,China University of Petroleum - East China | Zhou T.,Environmental Protection Agency of Dongying | Liu X.,China University of Petroleum - East China
Journal of Porous Materials | Year: 2015

A new partly-sulfided Ni–Mo dimetallic complex, [Ni(H2O)6][Mo2O2S2(edta)]·2H2O (edta = ethylenediaminetetraacetate) was synthesized. The complex was decomposed either in situ during the course of a dibenzothiophene (DBT) hydrodesulfrization (HDS) test or ex situ through sulfidation by H2S/N2 and two unsupported catalysts were obtained. These two catalysts and reference catalyst were characterized by XRD, BET and HRTEM. Textural and catalytic properties of these NiMo catalysts were strongly influenced by the nature of the precursor and the activation procedure. The introduction of edta ligand in the complex precursor resulted in the dispersion increase of nickel phases in these two catalysts. For these two catalysts, the ex situ activation method led to higher surface area, bigger pore volume, lower number of MoS2 layers and shorter MoS2 slabs than that led by the in situ activation method. The use of ex situ activation method led to a poor HDS activity and high hydrogenation selectivity while using in situ activation method, a net increase in HDS activity and initial rate constant was observed. © 2015, Springer Science+Business Media New York. Source


Yin H.,China University of Petroleum - East China | Zhou T.,Environmental Protection Agency of Dongying | Liu C.,China University of Petroleum - East China
Petroleum Processing and Petrochemicals | Year: 2012

Temperature programmed reduction (TPR) and X ray photoelectron spectroscopy (XPS) were used to characterize a series of NiMo/Al 2o 3 catalysts prepared by impregnation method. The inter action between active component and carrier and the effect of phosphorus on the interaction of NiMo/ Al 2o 3 catalysts was studied. Test results indicated that various interactions (week and strong) among active components Ni/Mo species and γ Al 2o 3carrier existed, and the interaction also happened between Ni species and Mo species. Adding phosphorus into NiMo/Al 2 o 3 catalyst could weaken the interaction between active component and carrier. Catalysts samples prior and post to sulfurization were analyzed by XPS and the existence of Al species interacted with active component was verified. Furthermore, Al binding energies in various samples were determined, as well as the effect of phosphorus on the interaction between Mo species and the carrier could be determined quantitatively by the XPS results of sulfidized sanililes. Source


Yin H.,China University of Petroleum - East China | Zhou T.,Environmental Protection Agency of Dongying | Chai Y.,China University of Petroleum - East China | Liu Y.,China University of Petroleum - East China | Liu C.,China University of Petroleum - East China
Progress in Chemistry | Year: 2012

The recent progress in the application of zeolites in hydrodesulfurization catalysts for the deep desulfurization is reviewed in this paper, including microporous zeolite, mesoporous zeolite, micro-mesoporous zeolite and nano-zeolite. The reaction pathways and mechanisms of the hydrodesulfurization of 4, 6-DMDBT and the measures to inhibit the overcracking reactions of desulfurization products over hydrodesulfurization catalysts containing zeolites are described briefly. Finally, challenges and prospects for further development of this field are presented. Source

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