Improving atmospheric water production yield: Enabling multiple water harvesting cycles with nano sorbent
KAUST DepartmentEnvironmental Science and Engineering Program
Water Desalination and Reuse Center, Division of Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
Water Desalination and Reuse Research Center (WDRC)
Biological and Environmental Sciences and Engineering (BESE) Division
Online Publication Date2019-11-03
Print Publication Date2020-01
Embargo End Date2021-01-01
Permanent link to this recordhttp://hdl.handle.net/10754/660505
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AbstractClean water shortage has long been a challenge in remote and landlocked communities especially for the impoverished. Atmospheric water is now considered as an unconventional but accessible fresh water source and sorption-based atmospheric water generator (AWG) has been successfully demonstrated a reliable way of harvesting atmospheric water. The water vapor sorbents with high water uptake capacity and especially fast vapor sorption/desorption kinetics have become the bottleneck to a desirable clean water productivity in AWG. In this work, we developed a new nano vapor sorbent composed of a nano carbon hollow capsule with LiCl inside the void core. The sorbent can capture water vapor from ambient air as much as 100% of its own weight under RH 60% within 3 h and quickly release the sorbed water within just half hour under 1 kW/m2 sunlight irradiation. A batch-mode AWG device was able to conduct 3 sorption/desorption cycles within 10 h during one day test in the outdoor condition and produced 1.6 kgwater/kgsorbent. A prototype of continuous AWG device was designed, fabricated, and successfully demonstrated, hinting a possible way of large-scale deployment of AWG for practical purposes.
CitationLi, R., Shi, Y., Wu, M., Hong, S., & Wang, P. (2019). Improving atmospheric water production yield: Enabling multiple water harvesting cycles with nano sorbent. Nano Energy, 104255. doi:10.1016/j.nanoen.2019.104255
SponsorsThe authors are grateful to KAUST for very generous financial support. We appreciate the assistance of KAUST mechanical workshop for the design and fabrication of continuous AWG device. In addition, we thank KAUST solar center for providing the access to their equipment.