T. R. Karpova, A. V. Lavrenov, M. Moiseenko, E. A. Buluchevskii, T. Gulyaeva, A. Arbuzov
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引用次数: 0
摘要
通过顺序浸渍法制备了以 B2O3-Al2O3 和 MoO3-Al2O3 为载体的多官能团含镍催化剂。在乙烯转化为 C5+ 烯烃或丙烯的过程中对这些催化剂进行了评估。通过 X 射线衍射、傅立叶变换红外光谱、吸附 CO 的傅立叶变换红外光谱、紫外可见光漫反射光谱、NH3 的温度编程还原和温度编程解吸对催化剂进行了表征。含有与酸性载体化学键合的 Ni2+ 阳离子的 NiO/B2O3-Al2O3 样品是最有效的乙烯低聚催化剂。在乙烯转化为丙烯的过程中，NiO/MoO3-Al2O3 催化剂的活性与乙烯二聚化活性位点（即与载体酸性位点结合的 Ni2+ 阳离子）以及以单钼酸盐形式存在的偏聚活性位点有关。
Nickel-containing catalysts for ethylene conversion to motor fuel components and light alkenes
Polyfunctional Ni-containing catalysts supported on the B2O3-Al2O3 and MoO3-Al2O3 were prepared by a sequential impregnation. They were evaluated in ethylene conversion to C5+ alkenes or propylene. The catalysts were characterized by X-ray diffraction, Fourier transformed infrared spectroscopy, Fourier transformed infrared spectroscopy of adsorbed CO, UV-VIS diffuse reflectance spectroscopy, temperature programmed reduction and temperature-programmed desorption of NH3. NiO/B2O3-Al2O3 samples containing Ni2+ cations chemically bonded to the acid support are the most effective catalysts for ethylene oligomerization. The NiO/MoO3-Al2O3 catalyst activity in the ethylene conversion to propylene is related with the presence of ethylene dimerization active sites, i.e. Ni2+ cations bonded to the support acidic sites, and active sites of metathesis in the form of monomolybdate species.
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