Silica gel-MIL 100(Fe) composite adsorbents for ultra-low heat-driven atmospheric water harvester
Silica gel-MIL 100(Fe) composite adsorbents for ultra-low heat-driven atmospheric water harvester
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DOI：
10.1016/j.energy.2021.121741
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发表时间：
2022
期刊：
影响因子：
9
通讯作者：
Hisham Maher;Tahmid Hasan Rupam;K. A. Rocky;R. Bassiouny;B. Saha
中科院分区：
文献类型：
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作者：
Hisham Maher;Tahmid Hasan Rupam;K. A. Rocky;R. Bassiouny;B. Saha
本研究的重点是合成和表征新的复合材料，包括RD硅胶和金属有机框架（MOF）MIL-100（Fe），以提升基于吸附的大气集水系统的性能。实验研究了添加MIL-100（Fe）对复合材料的多孔性、导热性和吸水特性的影响。此外，还引入了三个性能指标来考察系统的性能，包括净吸附量（Δq）和使用两种不同方法估算的效率。结果表明，在具有最高浓度的MIL 100（Fe）（69wt%）的复合材料中发现的热导率的最大增量。绘制热力学循环以显示热源温度为50 °C和70 °C的复合材料的性能。由29%RD硅胶、69%MIL 100（Fe）和2%PVP组成的复合物显示出最高的Δq值（比母体RD硅胶增加213.8%）。相比之下，该系统的效率比基于硅胶的AWH系统提高了187%。
The present study focuses on the synthesis and characterization of new composites comprising of RD silica gel and metal-organic framework (MOF) MIL-100(Fe) to upgrade the performance of the adsorption-based atmospheric water harvesting system. The impact of adding MIL-100(Fe) on the porous properties, thermal conductivity, and water adsorption characteristics of the composites has been experimentally investigated. Furthermore, three performance indicators are introduced to investigate the performance of the system, including net adsorbate uptake (Δq) and the efficiency estimation using two different approaches. Results showed that the maximum increment in the thermal conductivity was found in the composite having the highest concentration of MIL 100(Fe) (69 wt%). Thermodynamic cycles were drawn to show the performance of the composites with heat source temperatures of 50 °C and 70 °C. A composite of 29 % RD silica gel, 69 % MIL 100(Fe), and 2 % PVP showed the highest value of Δq (213.8 % increment over parent RD silica gel). In contrast, the efficiency of the system was enhanced up to 187 % than that of the silica gel-based AWH system.