高分子吸氢剂直接替代PdO应用于高真空多层储罐的吸氢性能

发布时间：2019-05-24 11:36

【摘要】：高真空多层绝热因其超好的绝热性能而广泛的应用于低温容器,但其夹层真空度会随着材料的放气而逐渐降低,放气的主要成分是氢气。为此,本文设计实验平台,研究了Polymer吸氢剂的吸附特性。根据BDDT理论,Polymer吸氢剂的吸附等温线为第一类和第二类吸附等温线的组合,低平衡压力时,满足Langmuir吸附模型,高平衡压力时,满足Harkins-Jura吸附模型;吸氢剂的吸附量为同平台实验得出的贵金属吸氢剂PdO吸附量的26.69%,进行PdO的直接替代质量比例应不低于5∶1;吸氢剂的平衡压力随H_2充注次数的增加而逐渐升高,平衡时间随充注H_2压力增加呈现阶梯型升高;吸氢剂达到最大吸附速率的时间均出现在吸附开始的第一小时,最大吸附速率和24 h内平均吸附速率均与初始H_2压力接近正比例关系,而与充注H_2次数无关。本文可以为工程设计人员应用新型吸氢剂提供理论依据。
[Abstract]:High vacuum multi-layer insulation is widely used in cryogenic vessels because of its excellent insulation performance, but the vacuum degree of interlayer will gradually decrease with the gas release of the material, and the main component of venting is hydrogen. In this paper, an experimental platform was designed to study the adsorption characteristics of Polymer hydrogen absorber. According to BDDT theory, the adsorption isotherms of Polymer hydrogen absorbers are the combination of the first type and the second kind of adsorption isotherms. At low equilibrium pressure, the Langmuir adsorption model is satisfied, and at high equilibrium pressure, the Harkins-Jura adsorption model is satisfied. The adsorption capacity of hydrogen absorber is 26.69% of that of precious metal hydrogen absorber PdO obtained from the same platform experiment, and the direct substitution mass ratio of PdO should not be less than 5 鈮，

本文编号：2484826