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

摘要James Goodwin CTS-9312519研究了固体同位素瞬时动力学分析中的再吸附和扩散效应。在对过程进行建模时，使用了几种建模技术，包括无量纲化、分区和参数集中。拉普拉斯变换产生与实验相比较的模型瞬变。确定了影响SSITKA再吸附和扩散的重要参数。在没有扩散或反应的情况下模拟重吸附，然后按顺序添加这些参数。粒子内扩散被类似地处理，两种方法结合成一个总的SSITKA模型。固态同位素瞬时动力学分析是研究催化反应的一种强有力的方法，它提供了通常无法获得的动力学和机理信息。这一努力将为这项技术增加一个主要的技巧元素，并应使SSITKA数据对工艺和反应堆设计更有用。

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.