论文部分内容阅读
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储罐,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。本文设计了实验平台,研究了国产银分子筛(NewGetter)和复合金属氧化物吸氢剂(PdO&AgO)的吸附等温线。根据BDDT理论,两种等温线均属于第Ⅰ类吸附等温线,符合Langmuir吸附模型,NewGetter饱和吸附量是21.63m L/g,占PdO&AgO的12.12%。平衡压力处于相同范围内时,两种吸氢剂的平均吸附速率和最大吸附速率均随平衡压力的升高而减小;PdO&AgO的平均吸附速率比NewGetter大两个数量级,最大吸附速率比NewGetter大一个数量级。本文可以为两种吸氢剂的推广使用提供理论依据。
Because of its excellent thermal insulation properties, high vacuum multi-layer insulation is widely used in cryogenic storage tanks. However, the interlayer vacuum will gradually decrease as the material deflates, and the main component of deflation is hydrogen. In this paper, an experimental platform was designed to study the adsorption isotherms of domestic NewGetter and composite metal oxide hydrogen-absorbing agents (PdO & AgO). According to the BDDT theory, both isotherms belong to the type Ⅰ adsorption isotherm and fit the Langmuir adsorption model. The saturated adsorption capacity of NewGetter is 21.63m L / g, accounting for 12.12% of PdO & AgO. When the equilibrium pressure is in the same range, the average adsorption rate and the maximum adsorption rate of the two hydrogen-absorbing agents both decrease with the increase of equilibrium pressure. The average adsorption rate of PdO and AgO is two orders of magnitude larger than that of NewGetter and the maximum adsorption rate is larger than that of NewGetter One order of magnitude. This article can provide theoretical basis for the promotion of the use of two kinds of hydrogen-absorbing agents.