Performance of tritium analysis system using inorganic-based hydrophobic platinum catalyst
Performance of tritium analysis system using inorganic-based hydrophobic platinum catalyst
复制标题
使用无机基疏水性铂催化剂的氚分析系统的性能
DOI：
10.1016/j.fusengdes.2017.03.116
复制
发表时间：
2017
影响因子：
1.7
通讯作者：
Hayashi Takumi
中科院分区：
文献类型：
--
作者：
Edao Yuki;Iwai Yasunori;Sato Katsumi;Hayashi Takumi
氧化催化反应器和水鼓泡器相结合的方法是气态氚最定量的分析方法。我们之前使用有机基疏水性铂催化剂开发了高精度氚测量系统。然而，之前的测量系统有一个缺点，即催化剂在超过 100°C 时就会燃烧。为了克服这一缺点，我们开发了一种不可燃的无机基疏水性铂催化剂（Pt/SiO2）。所开发的Pt/SiO2催化剂专门增强了疏水性，以防止水蒸气吸附在催化剂表面。为了有效地氧化氚，催化剂的粒径选择为1mmφ，并有意在催化反应器的入口处添加氢气以达到氧化的最佳浓度。性能测试表明，采用疏水性Pt/SiO2催化剂改进的定量氚分析系统提供了99.9%以上的高精度氚测量。我们已经确认改进的定量氚分析系统可在各种条件下使用。
A method combined oxidation catalytic reactor and water bubbler is the most quantitative analysis method for gaseous tritium. We developed a tritium measurement system with high accuracy using an organic-based hydrophobic platinum catalyst previously. However, the previous measurement system had a shortcoming that the catalyst was combustible over 100 °C. To overcome the shortcoming, we developed an inorganic-based hydrophobic platinum catalyst (Pt/SiO2) which was noncombustible. The developed Pt/SiO2catalyst was specially enhanced the hydrophobicity to prevent adsorption of water vapor on the surface of catalyst. To oxidize tritium efficiently, the particle diameter of 1mmϕ was selected for the catalyst and hydrogen was intentionally added at the inlet of the catalytic reactor to be the optimal concentration for oxidation. The performance tests showed that a modified quantitative tritium analysis system using by the hydrophobic Pt/SiO2catalyst provides tritium measurement with high accuracy more than 99.9%. We have confirmed the modified quantitative tritium analysis system is available in various conditions.