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Structure and Impact of Spatial and Spatio-Temporal States on Catalytical Surfaces

催化表面时空状态的结构和影响

基本信息

批准号：
8910843
负责人：
Dan Luss
金额：
$ 27.25万
依托单位：
University of Houston
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1989
资助国家：
美国
起止时间：
1989-09-01 至 1993-02-28
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8910843&HistoricalAwards=false
关键词：
Structure Impact Spatial Spatio Temporal

项目摘要

Large variety of spartial and spatio-temporal patterns with a wide degree of complexity exist in nature. Such structures show mathematically predictable order in the midst of complex nonlinear behavior. The coupling of chemical and biological reactions to transport processes such as diffusion or hydrodynamic convection leads to the formation of spatially organized distributions of the reactive compounds in reacting systems. The objective of this research is to conduct a coordinated experimental, theoretical and numerical study of the formation and evolution of spatial and spatio-temporal patterns on the surface of heterogeneous catalysts on which chemical reactions occur. The experiments will characterize quantitatively stationary and travelling wave temperature patterns on catalytic surfaces using an infrared imager. Analytical and numerical studies will help direct and organize the experimental studies and guide the development of principles predicting pattern formation. The experiments, in turn, will serve as a critical test of theoretical predictions and as a guide to model development and modifications. The study should help develop a framework for predicting the classes of reactions and mechanisms which lead to the formation of spatial and spatio-temporal studies, the conditions which lead to the evolution of these patterns, the impact of surface nonuniformities on these structured states, and the impact of these patterns on the performance of a catalyst. The study should provide information on how common these temperature patterns are, point out potential pitfalls in current interpretation of experiments carried out on catalytic surfaces, and advance the ability to exploit these structures for chemical synthesis purposes.

各种各样的空间和时空模式，自然界中存在着广泛复杂性。这种结构在复杂的非线性行为化学与生物的耦合反应到传输过程，如扩散或流体动力对流导致空间上的反应中活性化合物的有序分布系统. 这项研究的目的是进行一个协调的地层的实验、理论和数值研究空间和时空格局的演变非均相催化剂的表面，发生. 实验将定量描述稳态和行波温度模式催化表面使用红外成像仪。分析及数值研究将有助于指导和组织实验研究和指导原则的发展预测图案的形成。这些实验，反过来，作为对理论预测的关键检验，模型开发和修改指南。研究应该有助于建立一个框架，反应和机制，导致形成空间和时空研究，导致这些模式的演变，表面的影响，这些结构状态的不均匀性，以及这些模式对催化剂的性能有影响。研究应该提供这些温度有多常见的信息模式是，指出当前对催化剂进行的实验的解释表面，并提高利用这些结构的能力用于化学合成目的。