Temperature Patterns on Catalytic Pellets and Radial Flow Reactor.

将对单个、三维、催化球团和径向流反应器的时空温度模式形成的演化、选择、稳定性和影响进行协调的实验和理论研究。红外热成像仪将用于测量定制的连续流搅拌槽式反应器中圆柱形颗粒顶部和侧面的温度模式。该研究将确定可能的模式，它们对操作条件的依赖，以及颗粒间传输限制和颗粒大小的影响。模型反应包括钯催化剂上一氧化碳的氧化和镍催化剂上氢的氧化。在径向流反应器中的实验将提供有关可能演变的温度模式类型的信息。这些信息可用于制定控制策略。这项研究还将提供有关导致热点形成的条件的信息，这一事件可能导致商业反应堆出现严重的安全问题。这些信息对于合理制定规避其危险形成的操作和控制政策是必要的。将进行理论和计算研究，以模拟实验系统，并帮助找到最佳的操作区域。

A coordinated experimental and theoretical study of the evolution, selection, stability, and impact of spatiotemporal temperature pattern formation on single, three-dimensional, catalytic pellets and in radial-flow reactors will be carried out. An infrared thermal imager will be used to measure the temperature patterns on the top and sides of cylindrical pellets in a custom-built continuous flow stirred tank reactor. The study will determine the possible patterns, their dependence on operating conditions, and the influence of interparticle transport limitations and pellet size. Model reactions include the oxidation of carbon monoxide on palladium catalysts and the oxidation of hydrogen on a nickel catalyst. Experiments in a radial-flow reactor will provide information about the types of temperature patterns that may evolve. This information can be used to develop control strategies. The study will also provide information about the conditions leading to the formation of hot spots, an event which may lead to severe safety problems in commercial reactors. This information is needed for the rational development of operation and control policies that circumvent their hazardous formation. Theoretical and computational studies will be conducted to simulate the experimental systems and to help find optimal regions of operation.