Readsorption and Diffusion Effects on Steady-State Isotopic Transient Kinetic Analyses

稳态同位素瞬态动力学分析中的再吸附和扩散效应

• 批准号: 9312519
• 负责人: James Goodwin, Jr.
• 金额: $ 19万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-15 至 1997-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9312519&HistoricalAwards=false
• 关键词: Readsorption; Diffusion; Effects; Steady; State

ABSTRACT James Goodwin CTS-9312519 This is study of the effects of readsorption and diffusion in solid-state isotopic transient kinetic analysis (SSITKA). Several modelling techniques, including nondimensionalizing, compartmentalization, and parameter lumping, are used in modelling the processes. Laplace transforms produce model transients for comparison to experiments. The important parameters of readsorption and diffusion effecting SSITKA are determined. Readsorption is modeled without diffusion or reaction, and these parameters are then added sequentially. Intraparticle diffusion is treated similarly, and the two approaches combined into a total SSITKA model. Solid-state isotopic transient kinetic analysis is a powerful method for the study of catalytic reactions and provides kinetic and mechanistic information that often is otherwise unobtainable. This effort will add a major element of finesse to the technique and should make SSITKA data more useful for process and reactor design.

摘要James Goodwin CTS-9312519 本文研究了固体同位素瞬态动力学分析（SSITKA）中再吸附和扩散的影响。 几种建模技术，包括无量纲化，划分，和参数集总，在建模过程中使用。 拉普拉斯变换产生用于与实验比较的模型瞬态。 确定了影响SSITKA的再吸附和扩散的重要参数。 再吸附模型没有扩散或反应，这些参数，然后依次添加。 粒子内扩散处理类似，并结合到一个总SSITKA模型的两种方法。 固态同位素瞬态动力学分析是研究催化反应的一种强有力的方法，它提供了动力学和机理信息，这些信息通常是无法通过其他方法获得的。 这项工作将增加一个主要因素的技巧的技术，并应使SSITKA数据更有用的过程和反应器的设计。