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GB/T 42656-2023: Rare earth-based hydrogen storage alloys - Test method for measurement of kinetic properties of hydrogenation dehydrogenation reaction
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| GB/T 42656-2023 | English | 269 |
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Rare earth-based hydrogen storage alloys - Test method for measurement of kinetic properties of hydrogenation dehydrogenation reaction
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GB/T 42656-2023
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Basic data | Standard ID | GB/T 42656-2023 (GB/T42656-2023) | | Description (Translated English) | Rare earth-based hydrogen storage alloys - Test method for measurement of kinetic properties of hydrogenation dehydrogenation reaction | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H14 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 14,163 | | Date of Issue | 2023-08-06 | | Date of Implementation | 2024-03-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 42656-2023: Rare earth-based hydrogen storage alloys - Test method for measurement of kinetic properties of hydrogenation dehydrogenation reaction
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 77.120.99
CCSH14
National Standards of People's Republic of China
Rare earth hydrogen storage alloy
Test method for kinetic performance of hydrogen absorption and release reaction
Published on 2023-08-06
2024-03-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
This document is proposed and coordinated by the National Rare Earth Standardization Technical Committee (SAC/TC229).
This document was drafted by. Baotou Rare Earth Research Institute, Ordos Institute of Applied Technology, Antai Environmental Engineering Technology Co., Ltd., Zhongrare (Micro
Shan) Rare Earth New Materials Co., Ltd., Jiangxi Rare Earth Research Institute of the Chinese Academy of Sciences, Qiandong Rare Earth Group Co., Ltd., Inner Mongolia Rare Earth Hydrogen Storage
Alloy Co., Ltd., National Standard (Beijing) Inspection and Certification Co., Ltd., Youyan Engineering Technology Research Institute Co., Ltd., Nonferrous Metal Technology and Economic Research
HOME LIMITED.
The main drafters of this document. Xu Jin, Wang Li, Zhu Xiaomei, Ji Liqiang, Zhang Wei, Chen Qingjun, Yao Nanhong, Wang Yongguang, Yu Limin, Wang Shumao,
Li Baoquan, Liu Zhiping, Wang Wei, Li Jun, Hu Huazhou, Zhang Zimin, Gong Yongxin, Niu Xiaowei, Yan Huizhong, Hao Lei, Wei Zhihong, Song Guanyu, Shen Lihan.
Rare earth hydrogen storage alloy
Test method for kinetic performance of hydrogen absorption and release reaction
Warning --- Personnel using this document should have practical experience in regular laboratory work. This document does not address all possible safety
question. Users should have certain professional knowledge and skills and be fully aware of possible gas leaks, current leaks,
fire or other serious consequences.
1 Scope
This document describes the test method for the kinetic properties of the hydrogen absorption/desorption reaction of rare earth hydrogen storage alloys.
This document is suitable for using the volume method to test the hydrogen absorption/desorption reaction kinetics of rare earth hydrogen storage alloys. The test temperature range is. 25℃~
300℃, ambient temperature range 23℃±3℃, test pressure range. 0.001MPa~5MPa. 5MPa~10MPa rare earth hydrogen storage
Alloy testing may be carried out with reference to this document.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document.
GB/T 678 Chemical reagent ethanol (absolute ethanol)
GB/T 3634.2 Hydrogen Part 2.Pure hydrogen, high-purity hydrogen and ultra-pure hydrogen
GB/T 4842 Argon
GB/T 4844 Pure helium, high-purity helium and ultra-pure helium
GB/T 6379.2 Accuracy of measurement methods and results (correctness and precision) Part 2.Determination of repeatability of standard measurement methods
Basic methods of sex and reproducibility
GB/T 8170 Numerical rounding rules and representation and determination of limit values
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
The hydrogen storage alloy reacts with gaseous hydrogen at a certain temperature and forms metal hydride through phase change.
Note. When a hydrogen storage alloy is hydrogenated at a certain temperature, a solid solution α phase is first formed as the hydrogen pressure increases; after the hydrogen solid solution is saturated, metal hydrogenation begins to form.
In the physical phase (β phase), there is a two-phase structure of α phase and β phase. Theoretically, the hydrogen pressure remains unchanged; after the hydrogen absorption process is completed, a β single phase is formed, and the hydrogen absorption continues, and the pressure
The force increases rapidly.
3.2
After the hydrogen storage alloy absorbs hydrogen to form metal hydride, it releases gaseous hydrogen through phase change at a certain temperature.
Note. Hydrogen release is the reverse reaction process of hydrogen absorption.
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