GOALI: Sintering of Heterogeneous Catalysts

建议标题：GALI：多相催化剂的烧结建议编号：CTS-9911174首席研究员：Abhaya Datyee研究所：新墨西哥大学这个项目的目的是为了更好地了解催化剂通过烧结降解的机理。工业催化剂失活的两种主要方式是中毒和烧结。在催化剂烧结过程中，金属可能迁移形成更大的颗粒，或者载体的烧结可能导致金属的包裹。在许多应用中，烧结是催化剂失活的一种模式，包括汽车催化转化器和费托合成。对烧结过程的机理理解是有限的，主要是基于模型催化剂。提出了几种表面技术来改善目前的知识状况；这些技术包括小角X射线和中子散射、透射式电子显微镜和X射线衍射。基于分析结果，将开发控制催化剂载体纳米级表面拓扑的方法。对再分散过程的了解可以提出一些策略，在这些策略中，催化剂可以在现场进行定期再生。如果成功，该项目可能会改进高温工艺的催化剂设计。

AbstractProposal Title: GOALI: Sintering of Heterogeneous CatalystsProposal Number: CTS-9911174Principal Investigator: Abhaya DatyeInstitution: University of New MexicoThe objective of this project is to gain a better understanding of the mechanism of catalyst degradation through sintering. The two main modes of industrial catalyst deactivation are poisoning and sintering. During catalyst sintering, metal may migrate to form larger particles or sintering of the support may lead to encapsulation of the metal. Sintering is a mode of catalyst deactivation in many applications including automotive catalytic converters and Fischer-Tropsch synthesis. Mechanistic understanding of sintering processes is limited and based primarily on model catalysts. Several surface techniques are proposed to improve the present state of knowledge; these include small angle x-ray and neutron scattering, transmission electron microscopy, and x-ray diffraction. Methods to control the nano-scale surface topology of catalyst supports, based on analytical results, will be developed. Understanding of the redispersion process could suggest strategies where periodic regeneration of the catalyst could be carried out in-situ. If successful, this project could lead to improved catalyst design for high temperature processes.