储氢材料KB-MgH的动态真空安定性研究

2020 年 11 月 Journal of Safety Seienee and Teehnology Nov.2020

doi:10.11731/j.iesn.1673-193x,2020,11.003

储氢材料KB-MgH的动态真空安定性研究

孔祥北.陈思凝.魏利军

(中国安全生产科学研究院北京100012)

摘要:为研究储氧材料KB-MgH，分解放气过程，在以10℃为步长，80~130区间内，48120时间条件下，采用基于传感器压力变化计算被测物质分解放气量的动态真空安定性测试(DVST)方法.得到在上述条件下KB-MgH,分解过程中的压力变化 KB-MgH,的单位分解放气量和在不同研究温度下的分解放气规律，分析DVST测试时长的设置方法，验证KB-MgH,在时温等效系数为2.5时的时温等效特性。结果表明:在选定的测试条件下，KB-MgH，分解放气量稳定，单位分解放气量与样品状态无关;KB-MgH,单位质量放气量先快速增加，随后着于平稳，测试温度越高，KB-MgH，放气速率越快，单位质量放气量越大;根据选定的测试温度和温度变化步长可知KB-MgH,分解放气过程具有时温等效性。关销词:储氧材料:直容安定性:动态直察安定性:分解放气

中图分类号:X932 文献标志码:A 文章编号:1673-193X(20201-11-0019-07

Study on dynamic vacuum stability of Kβ-MgH, hydrogen storage material by DVST

KONG XinngbeiCHEN SiningWEILijun

(China Academy of Safety Science and TechnologyBeijing100012China)

Abstract: In order to study the outgassing process of hydrogen storage material Kp-MgH,this paper studied the decomposi tion process of Kβ-MgH,at 10 ℃ for 48 h and 120 h at 80 ℃ ~130℃the dynamic vacuum atability test(DVST)method calculating the decomposition deflation volume of tested material based on the change of sensor pressure was used to obtained the pressure change during the decomposition process of KB-MgH, under the above conditionsthe unit decomposition defla tion volume of Kβ-MgHand the decomposition deflation laws under different research temperatures. The setting method of DVST test duration was analyzedand the time-temperature equivalent characteristics of KB -MgH, when the time-temperature equivalent coefficient was 2.5 were verified. The results showed that under the selected teat conditionsthe decomposition deflation volume of KB-MgH, was stableand the unit decomposition deflation volume had nothing to do with the stalte ol sample. The unit mass deflation volume of KB-MgH,first increased rapidly,and then tended to stabilize. The higher the tesl temperature,the faster the deflation rate of KB-MgHand the larger the unit mass deflation volume. According to the seleei ed test temperature and temperature change step.the decomposition deflation process of KB-MgH; was time-temperature equitalennt.

收稿日期：2020-(8-20)

作者简介：孔祥北，本科，工程师，主要研究方向为化学品及化工安全。

通信作者：陈思餐，博士，教授级高级工程师，主要研究方向为化学品及化工安全。