HYDROTHERMAL SYNTHESIS OF Ni-Mo UNSUPPORTED CATALYST AND THEIR CATALYTIC PERFORMANCE

Abstract

Abstract: The composite metal oxides with different Ni-Mo atomic ratio were synthetized by hydrothermal reaction and characterized by XRD、BET and SEM. The unsupported catalysts were prepared from the composite metal oxides and their activities of HDS, HDN and HYD were evaluated in a continuous flow high-pressure micro reactor. The results show that the composite metal oxides are mainly composed of ammonium nickel molybdate, while the phase of Ni3S2 and MoS2 are detected in the unsupported sulfided catalysts. N2 adsorption-desorption characterization indicate that the composite oxides exhibits the bimodal mesoporous structures, and the specific surface area and pore volume increase with increasing amount of basic nickel carbonate tetrahydrate. Catalytic results manifest that the unsupported Ni-Mo catalyst with the Ni-Mo ratio of 1:1 has better hydrogenation activity: HDS of DBT is 100%, while HDN of quinoline and HYD of naphthalene reach 62.3% and 27.3%, respectively.

References

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