Tritium oxidation test by platinum-alumina catalyst under moisture and hydrocarbons atmosphere
Tritium oxidation test by platinum-alumina catalyst under moisture and hydrocarbons atmosphere
复制标题
湿气和碳氢化合物气氛下铂-氧化铝催化剂的氚氧化试验
DOI：
10.1016/j.fusengdes.2018.02.017
复制
发表时间：
2018
影响因子：
1.7
通讯作者：
Iwai Yasunori
中科院分区：
文献类型：
--
作者：
Edao Yuki;Sato Katsumi;Asahara Hiroo;Inomiya Hiroshi;Iwai Yasunori
为了设计适用于火灾事件的氚化系统（DS），研究火灾中电缆燃烧产生的水分和碳氢化合物对催化反应器氚氧化效率的影响是非常重要的。在实验中，我们假设氚在模拟房间中在以下情况下释放：（I）只有氚;（II）氚和过量水分;（III）氚和过量碳氢化合物，我们使用由铂-氧化铝催化剂填充的催化反应器和分子筛干燥器组成的DS进行了氚氧化的演示实验。考察了催化剂的氚化行为，确定了催化剂的体积，以满足装有该催化剂的催化反应器对氚氧化效率的要求。在三种情况下，由于氚的氧化效率都很高，理论上DS可以降低氚的浓度。结果表明，空气中氢气的浓度和催化剂的温度对反应器的氚氧化效率有影响。我们确定了氚氧化的最坏情况，并评估了满足氚氧化效率要求的催化剂用量。
To design a detritiation system (DS) applicable to a fire event, it is important to investigate influence of moisture and hydrocarbons produced by combustion of cables in fire on tritium oxidation efficiency of a catalytic reactor. In our experiments, when we assumed that tritium release in a simulated room in the following scenarios as fire situation, (I) tritium only; (II) tritium and excess moisture; (III) tritium and excess hydrocarbons, we conducted demonstration test of tritium oxidation using by DS consist of a catalytic reactor packed with platinum-alumina catalyst and a dryer with molecular sieves. We investigated the detritiation behavior and determined the volume of catalyst to satisfy requirement of tritium oxidation efficiency of a catalytic reactor packed with the catalyst. The tritium concentration theoretically decreased by DS since the tritium oxidation efficiency kept high under the conditions of three scenarios. Our results showed that the concentration of hydrogen in air and temperature of catalyst had an influence on the tritium oxidation efficiency of the catalytic reactor. We determined the worst scenario for tritium oxidation and evaluated the amount of catalyst to meet the requirement of the tritium oxidation efficiency.