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

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、分区化和参数集总，被用于建模过程。拉普拉斯变换产生模型瞬态，以便与实验比较。确定了影响SSITKA重吸附和扩散的重要参数。在没有扩散或反应的情况下模拟再吸附，然后依次添加这些参数。粒子内扩散处理类似，两种方法结合成一个总的SSITKA模型。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，它提供了通常无法获得的动力学和机理信息。这项工作将为该技术增加一个主要的技巧元素，并应使SSITKA数据对过程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.