GOALI - Fundamental Studies of Heterogeneous Catalyst Sintering

GOALI - 多相催化剂烧结的基础研究

• 批准号: 0500471
• 负责人: Abhaya Datye
• 金额: --
• 依托单位: University of New Mexico
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-15 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0500471&HistoricalAwards=false
• 关键词: GOALI; Fundamental; Studies; Heterogeneous; Catalyst

AbstractProposal Title: GOALI - Fundamental Studies of Heterogeneous Catalyst Sintering Proposal Number: CTS-0500471Principal Investigator: Abhaya DatyeInstitution: University of New Mexico Analysis (rationale for decision):This proposal represents a GOALI collaborative research effort between the University of New Mexico (UNM), Albuquerque, NM and Delphi (Tulsa, OK). Delphi is a leading manufacturer of mobile electronics, transportation components and systems technology. In this project, UNM and Delphi will team together to address a problem which pervades all applications of heterogeneous catalysts, namely the loss of active metal surface area during high temperature operation of heterogeneous catalysts. Catalyst sintering represents one of the most important factors limiting the long-term durability of catalysts. While nano-sized metal particles represent the mainstay of heterogeneous catalysis, coarsening of nanoparticles can occur at rather modest temperatures, causing irreversible changes in activity and selectivity. Industrial catalytic processes must therefore operate at temperatures where the rate of metal surface area loss due to sintering can be kept within manageable proportions. Despite its obvious technological importance, fundamental understanding of sintering is still lacking and predictive models are not available. The work will address the key variables that affect sintering rates: pore structure, gas atmosphere, metal-oxide interface, and support morphology. The research will be carried out at UNM while Delphi will contribute by providing personnel time, materials such as catalyst supports and finished catalysts and also providing access to its testing facilities. Experiments will be conducted with model catalysts that include (a) single crystal oxide surfaces or (b) surfactant templated oxide powders. A unique feature of the proposed research program is that industrial catalyst structures will be used as a test bed to explore the broad applicability of fundamental concepts being studied on model catalysts. The results of this research will be published in the archival literature and presented at national and international conferences in this field. The knowledge gained from fundamental studies of model catalysts will be applied to industrially relevant catalysts whose performance can be tested under realistic conditions. A specific objective of the proposed research program is the development of novel approaches for the study of heterogeneous catalysts. In addition, we will develop methods to control the nano-scale surface topology of catalyst supports, a factor that has heretofore been ignored in heterogeneous catalysis. The major contribution of this research program will be systematic studies of sintering phenomena under industrially relevant conditions, development of innovative approaches for the study of industrial heterogeneous catalysts and the development of synthetic approaches to engineer heterogeneous catalysts at the nano-scale.

摘要提案题目：GOALI -多相催化剂烧结的基础研究提案号：cts -0500471首席研究员：Abhaya datyeinstitute机构：新墨西哥大学分析（决策的理由）：该提案代表了新墨西哥大学（UNM）， Albuquerque， NM和Delphi （Tulsa， OK）之间的GOALI合作研究成果。德尔福是移动电子、运输部件和系统技术的领先制造商。在这个项目中，新墨西哥大学和德尔福将合作解决一个普遍存在于所有多相催化剂应用中的问题，即多相催化剂在高温操作过程中活性金属表面积的损失。催化剂烧结是限制催化剂长期耐久性的重要因素之一。虽然纳米尺寸的金属颗粒代表了多相催化的主体，但纳米颗粒的粗化可以在相当温和的温度下发生，导致活性和选择性的不可逆变化。因此，工业催化过程必须在由烧结引起的金属表面积损失率可以保持在可控比例的温度下进行。尽管其明显的技术重要性，但对烧结的基本理解仍然缺乏，预测模型也不可用。这项工作将解决影响烧结速率的关键变量：孔隙结构、气体气氛、金属氧化物界面和支撑形态。该研究将在新墨西哥大学进行，而德尔福将提供人员时间，催化剂支撑和成品催化剂等材料，并提供其测试设施。实验将用模型催化剂进行，包括(a)单晶氧化物表面或(b)表面活性剂模板化氧化物粉末。该研究计划的一个独特之处在于，工业催化剂结构将被用作一个试验台，以探索正在研究的基本概念在模型催化剂上的广泛适用性。这项研究的结果将发表在档案文献中，并在该领域的国家和国际会议上发表。从模型催化剂的基础研究中获得的知识将应用于工业相关的催化剂，其性能可以在现实条件下进行测试。提出的研究计划的一个具体目标是研究多相催化剂的新方法的发展。此外，我们将开发控制催化剂载体的纳米级表面拓扑结构的方法，这是迄今为止在多相催化中被忽视的一个因素。本研究项目的主要贡献将是系统研究工业相关条件下的烧结现象，开发工业非均相催化剂的创新研究方法，以及开发纳米级非均相催化剂的合成方法。