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Formation and Motion of Transversal Hot Zones in Packed Bed Reactors

填充床反应器横向热区的形成和运动

基本信息

批准号：
0203350
负责人：
Dan Luss
金额：
$ 24.68万
依托单位：
University of Houston
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2002
资助国家：
美国
起止时间：
2002-06-01 至 2005-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0203350&HistoricalAwards=false
关键词：
Formation Motion Transversal Hot Zones

项目摘要

Transversal hot zones can form in commercial packed-bed reactors and may be deleterious because they may decrease the yield of the desired products, deactivate the catalyst and initiate runaway reactions that may ultimately result in explosions. The PI plans to conduct experiments and theoretical numerical studies on hot zone formation and dynamics. The problem is of both academic interest and engineering importance as the goal is not just to observe, analyze and characterize such hot zones, but to gain the ability to predict and control them. The PI plans experimental studies using an infrared imager of hot zone formation and motion for two test reactions: the oxidation of carbon monoxide and acetylene hydrogenation. These experiments will be used to determine under what conditions hot zones form and what are their characteristic motions. Numerical simulations of a three-dimensional two-phase model will be used to gain an understanding of the critical rate processes and parameters affecting hot zone formation in a uniform packed bed reactor. The model will provide guidance about interesting regions for experimental study and for the organization of experimental observations.Impact:Hot spots and hot zones are a perennial problem of packed bed reactors. Providing guidance from first principals on how to avoid or control them would have significant safety benefits for the industrial operation of chemical manufacturing systems.

横向热区可能在商业填充床反应器中形成，并且可能是有害的，因为它们可能会降低所需产物的产率、使催化剂失活并引发失控反应，最终可能导致爆炸。项目负责人计划对热区形成和动力学进行实验和理论数值研究。这个问题既具有学术兴趣，又具有工程重要性，因为我们的目标不仅仅是观察、分析和表征这些热点区域，而是获得预测和控制它们的能力。 PI 计划使用红外成像仪对两个测试反应的热区形成和运动进行实验研究：一氧化碳氧化和乙炔氢化。这些实验将用于确定热区在什么条件下形成以及它们的运动特征是什么。三维两相模型的数值模拟将用于了解影响均匀填充床反应器中热区形成的临界速率过程和参数。该模型将为实验研究和组织实验观察提供有关感兴趣区域的指导。影响：热点和热区是填充床反应器的一个长期问题。由首要原则提供有关如何避免或控制它们的指导将为化学制造系统的工业运营带来显着的安全效益。