Migration and Passivation of Metal Contaminants on Model Fluid Cracking Catalysts

对流体裂化催化剂的失活进行了研究。主要研究了镍中毒和锑钝化对模型fcc各组分的影响。强调原位实验的多技术方法被用来获得对这些材料的催化、电子和结构特性的更基本的理解。使用的具体方法有发光、锑穆斯堡尔光谱、x射线粉末衍射、热重分析和扫描电子显微镜。催化研究是与联合石油公司的Mario Occelli博士合作完成的。流体裂解催化剂（FCCs）用于降低来自石油、煤、植物或其他来源的碳氢化合物油的平均分子量（以及粘度、沸点和密度）。因此是提炼这些材料的关键元素。天然油通常含有过渡金属（最常见的是镍或钒）配合物，使FCC失活。（石油的回收也受到金属污染的抑制。）这条调查线的目的是开发耐中毒的FCC材料，可以与金属污染（因此更便宜）的油一起使用。

Deactivation of fluid cracking catalysts (FCCs) is studied. The research focusses on poisoning by nickel and passivation by antimony on various components of model FCCs. A multitechnique approach that emphasizes in-situ experiments is used to obtain a more fundamental understanding of the catalytic, electronic, and structural properties of these materials. Specific methods used are luminescence, antimony Moessbauer spectroscopy, X-ray powder diffraction, thermogravimetric analysis, and scanning electron microscopy. Catalytic studies are done in collaboration with Dr. Mario Occelli of Union Oil Co. Fluid cracking catalysts (FCCs) are used to reduce the average molecular weight (and with it viscosity, boiling point, and density) of hydrocarbon oils derived from petroleum, coal, plants, or other sources, and are therefore key elements in the refining of these materials. The natural oils often contain transition metal (most commonly nickel or vanadium) complexes that deactivate the FCC. (Recycling of oil is also inhibited by metal contamination.) This line of investigation aims at development of FCC materials resistant to poisoning that could be used with metal-contaminated (and therefore less expensive) oils.