NiMo/Al2O3加氢脱硫催化剂的电镜表征

 采用常规透射电子显微技术（TEM）和扫描透射电子显微技术结合X射线能谱分析的测量技术（简称分析电子显微技术- —AEM）对NiMo/Al₂O₃系工业加氢脱硫催化剂的氧化态和硫化态进行对比研究。结果表明，对于硫化态加氢脱硫催化剂，TEM可以给出清晰的活性相的形貌和分布信息，活性相条纹的长度、堆叠层数等活性相参数特征的统计与其催化活性具有良好的关联。通过AEM的Mapping技术对NiMo/Al₂O₃催化剂氧化态和硫化态活性组分Ni、Mo的微区成分分布的测定，可获得催化剂活性相前体和硫化态活性组分的成分分布信息，克服了单一TEM不能提供成分信息的缺点，增加了对催化剂制备过程中活性组分变化的了解。

THE CHARACTERIZATION OF NiMo/Al2O3 HYDROTREATING CATALYST

The oxide and the sulfide NiMo/Al2O3 catalysts used for hydrodesulfurization were characterized by transmission electron microscopy (TEM) and analytic electron microscopy (AEM - scanning transmission electron microscopy with X-ray energy dispersive spectroscopy). The active phase information of the sulfide NiMo/Al2O3 catalyst, including length of stacks, layers of stacks, can be acquired by TEM. The relativity between the activity of catalyst and the TEM information was found. The dispersion information of different active metals element such as Ni and Mo of the oxide and sulfide catalyst, which could not be acquired by TEM, can be observed by the ATM mapping technology, to further understand the situation of the active components in catalyst during its preparation.