Adsorption-based atmospheric water harvesting device for arid climates

Hyunho Kim, Sameer R. Rao, Eugene A. Kapustin, Lin Zhao, Sungwoo Yang, Omar M. Yaghi () and Evelyn N. Wang ()
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Hyunho Kim: Massachusetts Institute of Technology
Sameer R. Rao: Massachusetts Institute of Technology
Eugene A. Kapustin: University of California–Berkeley
Lin Zhao: Massachusetts Institute of Technology
Sungwoo Yang: Massachusetts Institute of Technology
Omar M. Yaghi: University of California–Berkeley
Evelyn N. Wang: Massachusetts Institute of Technology

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract 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.

Date: 2018
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DOI: 10.1038/s41467-018-03162-7

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