GOALI: Sintering of Heterogeneous Catalysts

摘要提案标题：目标：非均相催化剂的烧结提案编号：CTS-9911174主要研究员：Abhaya Datye机构：新墨西哥大学本项目的目的是通过烧结更好地了解催化剂降解的机制。 工业催化剂失活的两种主要方式是中毒和烧结。 在催化剂烧结期间，金属可迁移以形成较大的颗粒，或者载体的烧结可导致金属的包封。 烧结是许多应用中催化剂失活的一种模式，包括汽车催化转化器和费托合成。 对烧结过程的机械理解是有限的，并且主要基于模型催化剂。 提出了几种表面技术，以改善目前的知识状态，这些包括小角度X射线和中子散射，透射电子显微镜，和X射线衍射。 根据分析结果，将开发控制催化剂载体的纳米级表面拓扑结构的方法。对再分散过程的理解可以建议可以原位进行催化剂的定期再生的策略。 如果成功，该项目可能会导致高温工艺催化剂设计的改进。

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.