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<p>Atmospheric moisture can be captured and condensed by using atmospheric water harvesting (AWH) technologies. AWH research has been dominated by high-temperature heat-driven desorption prototypes, which require long desorption cycles of 20–100 minutes and have large experimental system-level energy consumption of more than ~3 kWh kg<sup>−1</sup> in the best single-stage AWH systems. In this Review, we discuss alternative technologies for AWH to reduce energy consumption and increase the yield of these systems. Replacing thermal evaporation with vibrational actuation can provide sorbent regeneration with energies as low as 0.09 kWh kg<sup>−1</sup> and shorten the desorption cycle to 2 minutes or less. Stimuli-responsive phase-change sorbent materials can be used to reduce the energy intensity of both thermal and non-thermal moisture extraction methods. Further research into the mechanisms of operation of desorption driven by multiple stimuli could enable scale-up and commercialization of AWH technology.</p>

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Breaking the thermal limit of atmospheric water harvesting technologies

  • 期刊论文

  • 发表日期：

    2026年3月13日

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  • Ikra Iftekhar Shuvo,
  • Domingo R. Flores-Hernandez,
  • Grace Smith,
  • Carlos D. Díaz-Marín,
  • Nataliia Fihurka,
  • Svetlana V. Boriskina

摘要

Atmospheric moisture can be captured and condensed by using atmospheric water harvesting (AWH) technologies. AWH research has been dominated by high-temperature heat-driven desorption prototypes, which require long desorption cycles of 20–100 minutes and have large experimental system-level energy consumption of more than ~3 kWh kg−1 in the best single-stage AWH systems. In this Review, we discuss alternative technologies for AWH to reduce energy consumption and increase the yield of these systems. Replacing thermal evaporation with vibrational actuation can provide sorbent regeneration with energies as low as 0.09 kWh kg−1 and shorten the desorption cycle to 2 minutes or less. Stimuli-responsive phase-change sorbent materials can be used to reduce the energy intensity of both thermal and non-thermal moisture extraction methods. Further research into the mechanisms of operation of desorption driven by multiple stimuli could enable scale-up and commercialization of AWH technology.