论文部分内容阅读
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。
Hydrogen in the interlayer of high-vacuum multi-layer insulation storage tank is the main reason for the decrease of thermal insulation performance. However, the present hydrogen-absorbing agent PdO is expensive and the amount of hydrogen absorbed per unit is small. For this reason, this paper builds an experimental platform to study the hydrogen-absorbing properties of a new inexpensive composite hydrogen-absorbing agent (different proportions of CuO and 5A molecular sieves). The results show that CuO is unsuitable as a hydrogen-absorbing agent due to its low adsorption rate of 0.0489 ml (STP) / h and high adsorption temperature of 260 ° C. After addition of 25 g and 100 g of 5A molecular sieves into 5 g CuO, the hydrogen absorption temperature While the adsorption rate increased by 22.32 times. However, the increase of 5 A molecular sieve from 25 g to 100 g did not promote the adsorption. On the contrary, the hydrogen absorption rate decreased by 20.44%. While keeping 100 g5A molecular sieve unchanged, CuO increased from 5 g 10 g, the adsorption temperature decreased by 20.00%, the adsorption rate increased by 3.81%, the adsorption equilibrium time decreased by 39.13% and 54.54%, the equilibrium vacuum increased by 34.78% and 58.33% compared with the other two kinds of hydrogen absorbing agents; Composite hydrogen-absorbing agent has a lower adsorption temperature, higher adsorption rate and equilibrium vacuum, is a more appropriate vacuum hydrogen-absorbing agent.