Absract Air detritiation system of a fusion facility consists of catalyst reactors for tritium oxidation and a system to remove tritiated vapor from air. In the event of fire in the facility, the impact of gaseous impurities produced by polymeric materials on catalytic oxidation of tritium is one of the evaluation items. The point is the impact of reaction heat needs to be detected since gaseous impurities such as hydrocarbons are likely to combust in the catalyst reactors as well as heat generation by the combustion reaction is large. The distributions of temperature and concentration in a catalytic reactor are numerically evaluated using the thermophysical and chemical properties. The numerical analysis showed that the temperature in a catalytic reactor rose to 1173 K by the combustion of ethylene and hydrogen when air containing 1% concentration of hydrogen and 1% concentration of ethylene was fed into the reactor heated initially at 473 K. Since the increase in temperature is large, further technical consideration will emerge for designing such as the selection of material for a reactor, the increase in tritium permeation, and the impact of excessively heated air on equipment located at the downstream. The heat removal mechanism needs to be designed for catalytic reactors.

中文翻译：

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通过放热烃进料进入脱硝系统评价催化反应器中的热分布

摘要 聚变设施的空气脱氚系统由用于氚氧化的催化剂反应器和从空气中去除氚化蒸气的系统组成。设施发生火灾时，高分子材料产生的气态杂质对氚催化氧化的影响是评价项目之一。关键是需要检测反应热的影响，因为气态杂质如碳氢化合物很可能在催化剂反应器中燃烧，并且燃烧反应产生的热量很大。使用热物理和化学性质对催化反应器中的温度和浓度分布进行数值评估。数值分析表明，当将含有 1% 浓度氢气和 1% 乙烯浓度的空气加入最初加热至 473 K 的反应器中时，催化反应器中的温度因乙烯和氢气的燃烧而上升至 1173 K。在温度较大的情况下，设计时会出现进一步的技术考虑，例如反应器材料的选择、氚渗透的增加以及过热空气对下游设备的影响等。需要为催化反应器设计排热机制。氚渗透的增加，以及过热空气对下游设备的影响。需要为催化反应器设计排热机制。氚渗透的增加，以及过热空气对下游设备的影响。需要为催化反应器设计排热机制。