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Sorption-based atmospheric water harvesting (SAWH) technology may have considerable potential in mitigating freshwater scarcity, particularly if advancements can be achieved in sorbent materials and optimizing multi-cycle operations. This study introduces a SAWH device that employs a dual-salt composite sorbent and analyses its performance, with a specific focus on sorbent utilization efficiency, an important understudied parameter in SAWH technologies to-date. We investigated the effects of varying cycle numbers on water harvesting efficiency and analyzed multi-cycle processes from the perspective of sorbent utilization efficiency. Our findings elucidate the trade-off dynamics between sorbent utilization efficiency and water harvesting efficiency, highlighting the balance of material efficiency with water collection yield. These insights contribute a novel perspective to the development and optimization of SAWH technology, highlighting the critical importance of incorporating sorbent utilization efficiency in the pursuit of sustainable atmospheric water harvesting solutions.
Ding et al. (Sun,) studied this question.
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