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Adsorption-based atmospheric water harvesting device for arid climates.
Nature Communications ( IF 16.6 ) Pub Date : 2018-03-22 , DOI: 10.1038/s41467-018-03162-7
Hyunho Kim , Sameer R. Rao , Eugene A. Kapustin , Lin Zhao , Sungwoo Yang , Omar M. Yaghi , Evelyn N. Wang

Water scarcity is a particularly severe challenge in arid and desert climates. While a substantial amount of water is present in the form of vapour in the atmosphere, harvesting this water by state-of-the-art dewing technology can be extremely energy intensive and impractical, particularly when the relative humidity (RH) is low (i.e., below ~40% RH). In contrast, atmospheric water generators that utilise sorbents enable capture of vapour at low RH conditions and can be driven by the abundant source of solar-thermal energy with higher efficiency. Here, we demonstrate an air-cooled sorbent-based atmospheric water harvesting device using the metal-organic framework (MOF)-801 [Zr6O4(OH)4(fumarate)6] operating in an exceptionally arid climate (10-40% RH) and sub-zero dew points (Tempe, Arizona, USA) with a thermal efficiency (solar input to water conversion) of ~14%. We predict that this device delivered over 0.25 L of water per kg of MOF for a single daily cycle.

中文翻译:

用于干旱气候的基于吸附的大气集水装置。

在干旱和沙漠气候中,水资源短缺是一个特别严峻的挑战。尽管大气中以蒸汽的形式存在大量的水,但是通过最新的结冰技术来收集水可能会非常耗费能源并且不切实际,特别是在相对湿度(RH)较低时(即,低于〜40%RH)。相反,利用吸附剂的大气水发生器能够在低RH条件下捕获蒸气,并且可以由大量的太阳能热源以更高的效率驱动。在这里,我们演示了一种使用金属有机骨架(MOF)-801 [Zr 6 O 4(OH)4(富马酸盐)6在极端干燥的气候(相对湿度10-40%)和零零露点(美国亚利桑那州坦佩)下运行,热效率(太阳能转化为水的输入量)约为14%。我们预测,该设备在每天的单个循环中每千克MOF输送超过0.25 L的水。
更新日期:2018-03-22
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