两种吸附型压缩活性炭的氮吸附特性及比热容

IF 1.8 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics Pub Date : 2025-03-31 DOI:10.1016/j.cryogenics.2025.104069

Biqiang Liu , Lingxiao Qin , Haishan Cao

{"title":"两种吸附型压缩活性炭的氮吸附特性及比热容","authors":"Biqiang Liu , Lingxiao Qin , Haishan Cao","doi":"10.1016/j.cryogenics.2025.104069","DOIUrl":null,"url":null,"abstract":"<div><div>Joule-Thomson (JT) sorption cryocoolers are highly suitable for vibration-sensitive instruments due to their advantages of no vibration, no electromagnetic interference and high reliability. However, limited research has been conducted on the nitrogen adsorption capacity and specific heat capacities of activated carbons under extreme conditions of high temperature and pressure, which is essential to the design of sorption compressors. In this study, the adsorption isotherms of nitrogen on two activated carbons, Norit RB4 and Chemviron AP4-60, were measured over a wide temperature range between 223 K and 723 K, and pressures up to 10 MPa using a volumetric adsorption analyzer. Based on the measured data, three adsorption isotherm models (dual-site Langmuir, Sips, and Toth) were employed to fit the total adsorption amount. The results show that the dual-site Langmuir model is the most suitable for describing the total adsorption amount. The isosteric heat of absolute adsorption was also derived based on this model. Additionally, the specific heat capacities of RB4 and AP4-60 were determined over the range from 253 K to 713 K. Based on the adsorption isotherms and specific heat capacities, the efficiencies of sorption compressors using RB4 and AP4-60 as sorbents were predicted and compared using a thermodynamic model. These data provide valuable foundations for the design and development of high-efficiency sorption compressors.</div></div>","PeriodicalId":10812,"journal":{"name":"Cryogenics","volume":"148 ","pages":"Article 104069"},"PeriodicalIF":1.8000,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Nitrogen adsorption characteristics and specific heat capacities of two activated carbons for sorption-based compression\",\"authors\":\"Biqiang Liu , Lingxiao Qin , Haishan Cao\",\"doi\":\"10.1016/j.cryogenics.2025.104069\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Joule-Thomson (JT) sorption cryocoolers are highly suitable for vibration-sensitive instruments due to their advantages of no vibration, no electromagnetic interference and high reliability. However, limited research has been conducted on the nitrogen adsorption capacity and specific heat capacities of activated carbons under extreme conditions of high temperature and pressure, which is essential to the design of sorption compressors. In this study, the adsorption isotherms of nitrogen on two activated carbons, Norit RB4 and Chemviron AP4-60, were measured over a wide temperature range between 223 K and 723 K, and pressures up to 10 MPa using a volumetric adsorption analyzer. Based on the measured data, three adsorption isotherm models (dual-site Langmuir, Sips, and Toth) were employed to fit the total adsorption amount. The results show that the dual-site Langmuir model is the most suitable for describing the total adsorption amount. The isosteric heat of absolute adsorption was also derived based on this model. Additionally, the specific heat capacities of RB4 and AP4-60 were determined over the range from 253 K to 713 K. Based on the adsorption isotherms and specific heat capacities, the efficiencies of sorption compressors using RB4 and AP4-60 as sorbents were predicted and compared using a thermodynamic model. These data provide valuable foundations for the design and development of high-efficiency sorption compressors.</div></div>\",\"PeriodicalId\":10812,\"journal\":{\"name\":\"Cryogenics\",\"volume\":\"148 \",\"pages\":\"Article 104069\"},\"PeriodicalIF\":1.8000,\"publicationDate\":\"2025-03-31\",\"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/S0011227525000475\",\"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/S0011227525000475","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

焦耳-汤姆逊（JT）吸收式制冷机具有无振动、无电磁干扰、可靠性高等优点，非常适用于振动敏感型仪器。然而，活性炭在高温高压极端条件下的氮吸附能力和比热容的研究却很少，而这对吸附压缩机的设计至关重要。在本研究中，使用体积吸附分析仪测量了Norit RB4和Chemviron AP4-60两种活性炭在223 ~ 723 K和10 MPa压力下对氮气的吸附等温线。根据实测数据，采用三种吸附等温线模型（双点Langmuir、Sips和Toth）拟合总吸附量。结果表明，二元Langmuir模型最适合描述总吸附量。在此基础上推导了绝对吸附等容热。测定了RB4和AP4-60在253 ~ 713 K范围内的比热容。基于吸附等温线和比热容，利用热力学模型对RB4和AP4-60两种吸附剂的吸附压缩机效率进行了预测和比较。这些数据为高效吸附压缩机的设计和开发提供了有价值的依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Nitrogen adsorption characteristics and specific heat capacities of two activated carbons for sorption-based compression

Joule-Thomson (JT) sorption cryocoolers are highly suitable for vibration-sensitive instruments due to their advantages of no vibration, no electromagnetic interference and high reliability. However, limited research has been conducted on the nitrogen adsorption capacity and specific heat capacities of activated carbons under extreme conditions of high temperature and pressure, which is essential to the design of sorption compressors. In this study, the adsorption isotherms of nitrogen on two activated carbons, Norit RB4 and Chemviron AP4-60, were measured over a wide temperature range between 223 K and 723 K, and pressures up to 10 MPa using a volumetric adsorption analyzer. Based on the measured data, three adsorption isotherm models (dual-site Langmuir, Sips, and Toth) were employed to fit the total adsorption amount. The results show that the dual-site Langmuir model is the most suitable for describing the total adsorption amount. The isosteric heat of absolute adsorption was also derived based on this model. Additionally, the specific heat capacities of RB4 and AP4-60 were determined over the range from 253 K to 713 K. Based on the adsorption isotherms and specific heat capacities, the efficiencies of sorption compressors using RB4 and AP4-60 as sorbents were predicted and compared using a thermodynamic model. These data provide valuable foundations for the design and development of high-efficiency sorption compressors.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Cryogenics 物理-热力学

CiteScore

3.80

自引率

9.50%

发文量

审稿时长

2.1 months

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