溶胶-沉积镍基催化剂及其在 裂解C＋9 加氢中的应用

研究了溶胶-沉积法制备的高镍含量负载型金属催化剂,考察了镍含量、载体组成及焙烧温度等对催化剂性能的影响，对制备的催化剂进行了BET、XRD及TPR表征。结果表明，催化剂表面积和孔径随镍含量增加而减小；溶胶-沉积NiO/Al₂O₃-SiO₂中Ni以高分散的NiO形式存在，与载体相互作用较强，没有NiAl₂O₄尖晶石生成；催化剂比表面积较大［（220~240） m²·g^-1 ］，孔径适中［（8~10） nm］。溶胶-沉积Ni/Al^₂O₃-SiO₂催化剂具有良好的催化性能，将其应用于裂解C^＋₉ 加氢反应，效果较好，烯烃加氢率达90%，芳烃损失为零，催化剂性能稳定，耐胶质能力强。

Ni-based catalysts prepared by sol-deposition method and their application of the hydrogenation of C9+ pyrolysis gas

A series of NiO/Al2O3-SiO2 catalysts were prepared by sol-deposition method and characterized by BET,XRD and TPR.The effect of Ni contents,support composition and calcination temperature on the catalyst performance was investigated.The results showed that the surface area and pore diameter of the catalysts were decreased with the increase of Ni contents.NiO/Al2O3-SiO2 catalysts prepared by sol-deposition method had fine dispersion of Ni particles and strong interaction between Ni2+ and the support.There was no NiAl2O4 spinel on the catalyst.Silica-alumina-based catalysts with large surface area (220-240) m2·g-1] and moderate pore diameter (8-10) nm] possessed good catalytic properties in hydrogenation of C+9 pyrolysis gas.The hydrogenation conversion of C+9 pyrolysis gas was 90% and aromatic loss was zero.The catalyst exhibited good stability and stong resistance of the colloid.