除氢材料在高真空多层绝热设备中维持高真空行为研究

doi:10.11896/cldb.20040132

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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.

Key words： high vacuum multi-layer insulation hydrogen absorption material inspiratory performance heat-insulating property efficient catalytic hydrogen getter (ECG) Ag-Z getter adsorption isotherm curve

Published: 03 August 2021

CLC number:	O643
	TQ424

Fund:National Key R&D Project (2017YFC0805601).

About author:: Yang Yu, master student, Lanzhou University of Technology, research on multi-layer hydrogen getters in high vacuum multi-layer insulation equipment maintained high vacuum performance. He has published three papers and applied for four patents; and obtained the se-cond prize of the 7th National Process Equipment and Practice Competition; the second prize of the “Zoran Cup” of the Chinese University Student Mechanical Engineering Innovation and Creativity Competition; the 5th China “Internet Plus” Silver Medal in the Gansu Province and the third prize of the China Undergraduate Mechanical Engineering Innovation and Creativity Competition; first-class master scholarship (10% of the school).
Ming Zhu, senior engineer, working at China Special Equipment Inspection and Research Institute. He has obtained a doctorate degree in refrigeration and cryoge-nic engineering from Shanghai Jiao Tong University from September 2007 to March 2012. Then he entered China Special Equipment Inspection and Research Institute for post-doctoral workstation. As the first author, he has published more than 10 papers in academic journals at home and abroad. The research work mainly focuses on the national key development of hydrogen energy and LH₂ storage and transportation, and basic theory and application research on the performance improvement for structural safety and reliability of cryogenic containers. As the main person, he presided over the science and technology plan projects of the State Administration for Market Regulation, and undertakes research tasks for the National 13th Five-year Key Subject.
Shuping Chen, professor and doctoral tutor of Lanzhou University of Technology. He has long been engaged in low-temperature storage and transportation equipment, LNG technology, and vacuum leak detection techno-logy, etc. Undertook more than 60 projects under the National 863 Program, Science and Technology Major Projects in Gansu Province and National Natural Science Foundation Projects and Enterprise Projects; obtained 5 provincial and bureau-level science and technology awards, and served as a member of the Lanzhou University of Technology Professor Advisory Committee and Lanzhou 510 Research Institute Member of the Academic Committee of the National Key Laboratory of Vacuum Cryogenic Technology and Physics and member of the Cryogenic Vessel Working Group of the National Boiler and Pressure Vessel Standardization Technical Committee. He has published more than 80 papers in authoritative journals at home and abroad such as Cryogenics, Journal of Aerospace Engineering, and Chinese Journal of Chemical Industry, etc. He has obtained the second prize of Gansu Provincial Science and Technology Progress Award, the second prize of Excellent New Products and New Technology Achievements, and the third prize of National Machinery Industry Science and Technology Award, etc.

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Cite this article:

YU Yang,ZHU Ming,CHEN Shuping, et al. Research on Maintaining High Vacuum in High Vacuum Multilayer Insulation Equipment of Hydrogen Getters[J]. Materials Reports, 2021, 35(14): 14035-14039.

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http://www.mater-rep.com/EN/10.11896/cldb.20040132 OR http://www.mater-rep.com/EN/Y2021/V35/I14/14035

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