Teng Pan , Fangqiu Yu , Ke Li , Zhenxing Zhu , Fei Wei , Wei Dai , Jun Shen
{"title":"描述碳材料低温吸附 4He 的杜宾-拉杜什凯维奇修正模型","authors":"Teng Pan , Fangqiu Yu , Ke Li , Zhenxing Zhu , Fei Wei , Wei Dai , Jun Shen","doi":"10.1016/j.cryogenics.2024.103977","DOIUrl":null,"url":null,"abstract":"<div><div>The <sup>4</sup>He and <sup>3</sup>He adsorption characteristics of porous materials serve as important references for designing and optimizing cryogenic components or systems, including adsorption pumps, helium adsorption refrigerators, and gas-gap heat switches. In this study, various types of activated carbon and carbon nanotubes were measured for their <sup>4</sup>He adsorption characteristics in the range of 3–20 K and 1–18000 Pa. Parameters such as micropore volume and adsorption potential energy of porous materials were analyzed through Dubinin-Radushkevich (DR) model. A modified DR model describing the monolayer adsorption of <sup>4</sup>He on different carbon-based adsorbents was developed in this study, greatly facilitating the design of adsorption systems. Further, the <sup>4</sup>He adsorption model was applied to gas-gap heat switches, and a numerical model of the <sup>4</sup>He gas-gap heat switch was established, which accurately predicts the actuation characteristics of several heat switches.</div></div>","PeriodicalId":10812,"journal":{"name":"Cryogenics","volume":"144 ","pages":"Article 103977"},"PeriodicalIF":1.8000,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A modified dubinin-radushkevich model describing the cryogenic adsorption of 4He on carbon materials\",\"authors\":\"Teng Pan , Fangqiu Yu , Ke Li , Zhenxing Zhu , Fei Wei , Wei Dai , Jun Shen\",\"doi\":\"10.1016/j.cryogenics.2024.103977\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The <sup>4</sup>He and <sup>3</sup>He adsorption characteristics of porous materials serve as important references for designing and optimizing cryogenic components or systems, including adsorption pumps, helium adsorption refrigerators, and gas-gap heat switches. In this study, various types of activated carbon and carbon nanotubes were measured for their <sup>4</sup>He adsorption characteristics in the range of 3–20 K and 1–18000 Pa. Parameters such as micropore volume and adsorption potential energy of porous materials were analyzed through Dubinin-Radushkevich (DR) model. A modified DR model describing the monolayer adsorption of <sup>4</sup>He on different carbon-based adsorbents was developed in this study, greatly facilitating the design of adsorption systems. Further, the <sup>4</sup>He adsorption model was applied to gas-gap heat switches, and a numerical model of the <sup>4</sup>He gas-gap heat switch was established, which accurately predicts the actuation characteristics of several heat switches.</div></div>\",\"PeriodicalId\":10812,\"journal\":{\"name\":\"Cryogenics\",\"volume\":\"144 \",\"pages\":\"Article 103977\"},\"PeriodicalIF\":1.8000,\"publicationDate\":\"2024-10-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Cryogenics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0011227524001978\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"PHYSICS, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cryogenics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0011227524001978","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
引用次数: 0
摘要
多孔材料的 4He 和 3He 吸附特性是设计和优化低温元件或系统（包括吸附泵、氦吸附制冷器和气隙热交换器）的重要参考。本研究测量了各种类型的活性炭和碳纳米管在 3-20 K 和 1-18000 Pa 范围内的 4He 吸附特性。通过杜宾-拉杜什基维奇（Dubinin-Radushkevich，DR）模型分析了多孔材料的微孔体积和吸附势能等参数。该研究建立了一个描述 4He 在不同碳基吸附剂上单层吸附的改进 DR 模型，大大方便了吸附系统的设计。此外，还将 4He 吸附模型应用于气隙热开关，并建立了 4He 气隙热开关的数值模型，准确预测了多个热开关的致动特性。
A modified dubinin-radushkevich model describing the cryogenic adsorption of 4He on carbon materials
The 4He and 3He adsorption characteristics of porous materials serve as important references for designing and optimizing cryogenic components or systems, including adsorption pumps, helium adsorption refrigerators, and gas-gap heat switches. In this study, various types of activated carbon and carbon nanotubes were measured for their 4He adsorption characteristics in the range of 3–20 K and 1–18000 Pa. Parameters such as micropore volume and adsorption potential energy of porous materials were analyzed through Dubinin-Radushkevich (DR) model. A modified DR model describing the monolayer adsorption of 4He on different carbon-based adsorbents was developed in this study, greatly facilitating the design of adsorption systems. Further, the 4He adsorption model was applied to gas-gap heat switches, and a numerical model of the 4He gas-gap heat switch was established, which accurately predicts the actuation characteristics of several heat switches.
期刊介绍：
Cryogenics is the world''s leading journal focusing on all aspects of cryoengineering and cryogenics. Papers published in Cryogenics cover a wide variety of subjects in low temperature engineering and research. Among the areas covered are:
- Applications of superconductivity: magnets, electronics, devices
- Superconductors and their properties
- Properties of materials: metals, alloys, composites, polymers, insulations
- New applications of cryogenic technology to processes, devices, machinery
- Refrigeration and liquefaction technology
- Thermodynamics
- Fluid properties and fluid mechanics
- Heat transfer
- Thermometry and measurement science
- Cryogenics in medicine
- Cryoelectronics
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
