MIL-100(Fe) as a functional sorbent coating: Green synthesis, energetic insights, and heat exchange efficiency

IF 5.8 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Heat and Mass Transfer Pub Date : 2025-09-12 DOI:10.1016/j.ijheatmasstransfer.2025.127811

XN Ren , BC Wang , ZQ Zhang , XW Gao , GG Cheng , DT Bui

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引用次数: 0

Abstract

Efficient air dehumidification is essential for improving indoor air quality and energy efficiency in cooling applications. This study explores the use of MIL-100(Fe) as a high-performance desiccant coating for fin-tube heat exchangers in air dehumidification systems. MIL-100(Fe) was synthesized using an environmentally friendly method and comprehensively characterized by X-ray diffraction (XRD), nitrogen adsorption, scanning electron microscopy (SEM), and thermogravimetric analysis (TGA) to confirm its crystal structure, morphology, high porosity, and thermal stability. The water vapor adsorption and desorption isotherms were analyzed at different temperatures and fitted using the Dubinin-Astakhov (D-A), Sun-Chakraborty (S-C), and universal isotherm models. The results revealed insights into the stepwise adsorption mechanism and thermodynamics, correlating with the material’s crystal structure. To enhance coating stability, four different binders (hydroxyethyl cellulose, sodium polyacrylate, cellulose acetate, and polyvinyl alcohol) were evaluated. The optimized 10% hydroxyethyl cellulose binder provided a balance between mechanical stability and adsorption capacity. The coated heat exchanger was tested under actual operating conditions, demonstrating twice the moisture removal efficiency of a conventional silica gel-coated heat exchanger. The integration of site-resolved thermodynamic modeling with experimental validation under realistic operating conditions offers new insights into MOF-based thermal management materials and highlights MIL-100(Fe)’s potential for energy-efficient dehumidification systems.

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MIL-100（Fe）作为功能性吸附剂涂层：绿色合成、能量见解和热交换效率

高效的空气除湿对于改善室内空气质量和冷却应用中的能源效率至关重要。本研究探讨了MIL-100（Fe）作为空气除湿系统中翅片管热交换器的高性能干燥剂涂层的使用。采用环境友好的方法合成了MIL-100(Fe)，并通过x射线衍射（XRD）、氮气吸附、扫描电镜（SEM）和热重分析（TGA）对其进行了综合表征，证实了其晶体结构、形貌、高孔隙率和热稳定性。采用Dubinin-Astakhov （D-A）、Sun-Chakraborty （S-C）和通用等温线模型拟合了不同温度下的水蒸气吸附和解吸等温线。结果揭示了与材料晶体结构相关的逐步吸附机制和热力学。为了提高涂层的稳定性，对四种不同的粘合剂（羟乙基纤维素、聚丙烯酸钠、醋酸纤维素和聚乙烯醇）进行了评估。优化后的10%羟乙基纤维素粘合剂在机械稳定性和吸附能力之间取得了平衡。在实际操作条件下对涂层换热器进行了测试，证明了传统硅胶涂层换热器的除湿效率是其两倍。现场解析热力学建模与实际操作条件下的实验验证的集成为基于mof的热管理材料提供了新的见解，并突出了MIL-100（Fe）在节能除湿系统方面的潜力。

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 Heat and Mass Transfer 工程技术-工程：机械

CiteScore

10.30

自引率

13.50%

发文量

1319

审稿时长

41 days

期刊介绍： International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems. Topics include: -New methods of measuring and/or correlating transport-property data -Energy engineering -Environmental applications of heat and/or mass transfer