摘要
在高真空多层绝热储罐夹层的氢气是造成其绝热性能下降的主要原因,而现在的吸氢剂PdO价格昂贵单位吸氢量较小。为此本文搭建实验平台,研究新型廉价复合吸氢剂(不同比例的CuO和5A分子筛)的吸氢特性。研究结果表明:CuO因偏低的吸附速率0.0489 ml(STP)/h和偏高的吸附温度260℃,不适合单独作为吸氢剂;在5 gCuO中加入25 g和100g5A分子筛后,吸氢温度下降23.07%,吸附速率平均提升22.32倍,然而5 A分子筛由25 g增加到100 g,并未促进吸附,相反吸氢速率下降了20.44%;保持100 g5A分子筛不变,CuO由5 g增加至10 g,相较于其他两种比例的吸氢剂,吸附温度下降20.00%,吸附速率提高3.81%,吸附平衡时间缩短39.13%和54.54%,平衡真空度提高34.78%和58.33%;CuO和5A复合吸氢剂拥有较低的吸附温度,较高的吸附速率和平衡真空度,是一种比较适宜的真空吸氢剂。
We addressed the H2-adsorption of a mixture of CuO powder and 5A molecular sieve in vacuum insulated cryogenic tank. The impact of the mass-ratio of CuO and 5A on the adsorption properties of H2 wasinvestigated with the lab-built test-bench. The results show that depending on their mass-ratio,a mixture of CuO and 5A is a good low-cost H2 getter material. For example,CuO works poorly because of its low adsorption rate and high adsorption temperature（ 260℃.）. Adding 5 g CuO into 25 g5A（ 5 g CuO25 g5A） increased the adsorption rate by 22. 32 times and decreased the adsorption temperature by 23. 07%; however,an increase of 5A from 25 to 100 g（ 5 g CuO100 g5A） reduced the adsorption-rate by 20. 44%. The mixture of 10 g CuO100 g5 A outperformed both 5 g CuO25 g5 A and 5 g CuO100 g5 A because it reduced the adsorption temperature by 20. 00%,increased the adsorption rate by 3. 81%,shortened the equilibrium time by 39. 13% and 54. 54% and lowered the equilibrium pressure by34. 78% and 58. 33%,respectively.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2016年第9期969-974,共6页
Chinese Journal of Vacuum Science and Technology
关键词
吸氢剂
复合吸附剂
吸氢特性
绝热气瓶
Hydrogen getter
Composite adsorbent
Sorption characteristics
Thermal insulating cylinder
