Optimized MIL-101(Cr)/graphene oxide/calcium chloride composites for efficient adsorption refrigeration

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-05-20 DOI:10.1016/j.ijrefrig.2025.05.014

Shuyi Yao, Zhongbao Liu, Shijie Li, Zhipeng Qie

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引用次数: 0

Abstract

Improving water vapor adsorption performance at low humidity and enhancing thermal conductivity are beneficial for the performances of adsorption refrigeration materials. In this study, MIL-101(Cr) was integrated with graphene oxide (GO) and calcium chloride (CaCl₂) to develop high-performance composite adsorbents. The materials were characterized by XRD, Raman spectroscopy, nitrogen adsorption-desorption, and thermal conductivity measurements. Adsorption and desorption tests revealed that the MIL-101(Cr)/2 % GO + 20 % CaCl₂ composite exhibited the best performance, achieving a dynamic adsorption capacity of 0.368 g/g and a 36 % increase in thermal conductivity compared to pure MIL-101(Cr). Meanwhile, the heat and mass transfer performance of the materials and the COP and SCP of the system were analyzed by modeling the adsorbent and the system under the corresponding operating conditions, and MIL-101(Cr)/2 % GO + 20 % CaCl₂ showed the best performance among all the samples of the present study in all these models. Furthermore, the composite demonstrated excellent stability after 50 adsorption-desorption cycles, retaining a desorption efficiency above 93 %. The synergistic effects of GO and CaCl₂ significantly improved both water vapor adsorption and thermal conductivity, making this composite a promising candidate for energy-efficient adsorption refrigeration systems.

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优化的MIL-101(Cr)/氧化石墨烯/氯化钙复合材料高效吸附制冷

提高低湿度条件下的水蒸气吸附性能和提高导热系数有利于吸附制冷材料的性能。本研究将MIL-101（Cr）与氧化石墨烯（GO）和氯化钙（cacl2）结合，制备高性能复合吸附剂。采用XRD、拉曼光谱、氮吸附-脱附、导热系数等方法对材料进行了表征。吸附和解吸实验表明，MIL-101(Cr)/ 2% GO + 20% cacl2复合材料的吸附性能最好，动态吸附量为0.368 g/g，导热系数比纯MIL-101（Cr）提高36%。同时，通过对吸附剂和系统在相应操作条件下的建模，分析了材料的传热传质性能以及系统的COP和SCP，在所有模型中，MIL-101(Cr)/ 2% GO + 20% cacl2的性能都是本研究样品中最好的。此外，该复合材料在50次吸附-脱附循环后表现出优异的稳定性，脱附效率保持在93%以上。氧化石墨烯和cacl2的协同作用显著提高了水蒸气吸附和导热性，使该复合材料成为节能吸附制冷系统的有希望的候选材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Refrigeration-revue Internationale Du Froid 工程技术-工程：机械

CiteScore

7.30

自引率

12.80%

发文量

363

审稿时长

3.7 months

期刊介绍： The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.