1 College of Petroleum and Chemical, Lanzhou University of Technology, Lanzhou 730050, China 2 China Special Equipment Inspection and Research Institute, Beijing 100029, China 3 College of Energy and Power Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
Abstract: The insulation materials and metal materials in high vacuum multilayer insulation cryogenic equipment released hydrogen into the interlayer for a long time, which led to the deterioration of the insulation vacuum and seriously affect the insulation performance of the container. In this paper, an experimental device was set up through testing the change of vacuum degree, then compared the adsorption performance of Ag-Z getter and high efficiency composite hydrogen getter(ECG). The adsorption isotherm curves of hydrogen getters were obtained. The research defined that the adsorption process of hydrogen getters accords with the first type of BDDT theory, namely Langmuir adsorption. The cumulative insulation capacity of Ag-Z getter was 63.084 mL/g, and the average adsorption rate was 0.132 mL/(g·h). And ECG was 366.276 mL/g and 1.353 mL/(g·h), which was 5.81 times and 10.25 times of Ag-Z getter, respectively. Moreover, with the increased of initial H2 pressure the average adsorption rate of each group increased and then decreased. The maximum adsorption rate of the two hydrogen getters occurred in the first hydrogenation, and the equilibrium pressure of the hydrogen getters increased with the initial pressure of H2. The experimental results provi-ded a basis for the application of two kinds of hydrogen getters in cryogenic equipment and transportation industry.
1 Rosa E C, Kenneth D S, Donald F. Getters Cowgill Journal of Vacuum Science & Technology,2014,32(6),60. 2 Choi J, Pan L, Zhang F, et al. Surface Science,2015,640,150. 3 Fu X L.Cryogenics,1994(1),11(in Chinese). 符锡理.低温工程,1994(1),11. 4 Xie S W, Deng D, Wang R S. Chinese Journal of Vacuum Science and Technology,2013,33(6),547(in Chinese). 谢斯卫,邓冬,汪荣顺.真空科学与技术学报,2013,33(6),547. 5 Chen S J, Wang R S, Wei W,et al. Chinese Journal of Vacuum Science and Technology,2009(4),100(in Chinese). 陈树军,汪荣顺,魏蔚,等.真空科学与技术学报, 2009(4),100. 6 Yu Y, Chen S P, Zhu M, et al. Chinese Journal of Vacuum Science and Technology,2020,40(4),313(in Chinese). 于洋,陈叔平,朱鸣,等.真空科学与技术学报, 2020,40(4),313. 7 Zhou C, Li D T, Zhou H, et al. Materials Reports A: Review Papers,2019,33(2),438(in Chinese). 周超,李得天,周晖,等.材料导报:综述篇, 2019,33(2),438. 8 Belousov V M,Vasylyev M A, Lyashenko L V, et al. Chemical Enginee-ring Journal,2003,91,143. 9 Zeng Y W. Study on the hydrogen absorption characteristics of the oxidation treatment in high vacuum multilayer adiabatic structures. Master's Thesis, Shanghai Jiao Tong University, China,2009(in Chinese). 曾宇梧.一氧化把在高真空多层绝热结构中的吸氢特性研究.硕士论文,上海交通大学,2009. 10 Wang J, Zhan Y, Wei W, et al. Vacuum,2016,131,44. 11 Wang J, Zhan Y, Wang W, et al. Vacuum,2018,49,87. 12 Xie S W. Study on the characteristics of getter in high-vacuum multilayer insulated cryogenic container. Master's Thesis, Shanghai Jiao Tong University, China,2009(in Chinese). 谢斯卫.高真空多层绝热低温容器内吸气剂的吸气特性研究.硕士学位论文,上海交通大学,2013. 13 Wang X J, Xie Y B, Ning P, et al. Materials Reports A: Review Papers, 2018,32(12),4089(in Chinese). 王学谦,谢怡冰,宁平,等.材料导报:综述篇,2018,32(12),4089. 14 Yan Y Y, Wang Q, Huang Z, et al. Journal of Atomic and Molecular Physics,2014,31(5),701(in Chinese). 闫跃阳,王茜,黄整,等.原子与分子物理学报, 2014,31(5),701. 15 Wang F, Zhou W M, Luo X M, et al. Performance test method of vacuum insulation cryogenic equipment, China Standards Press, China, 2011(in Chinese). 王芳,周伟明,罗晓明,等.真空绝热深冷设备性能实验方法,中国标准出版社,2011. 16 Zhao J G. Application of adsorption, Chemical Industry Press, China,2005(in Chinese). 赵继国.吸附作用应用原理,化学工业出版社,2005. 17 Lowell S, Shields J E, Morral J E. Journal of Engineering Materials and Technology,1985,107(2),180. 18 Liu Q S, Zheng T, Wang P, et al. Chemical Engineering Journal,2010,157(23),352. 19 Wang X, An L P, Zhang X T, et al. Materials Reports A: Review Papers, 2018,32(1),93(in Chinese). 王霞,安丽平,张晓涛,等.材料导报:综述篇, 2018,32(1),93. 20 Da D A, Xiao X Z, Liu Y K, et al. Vacuum design manual, National Defense Science and Technology Press, China,2006(in Chinese). 达道安,肖祥正,刘玉魁,等.真空设计手册,国防科技出版社,2006.