Adsorption-based atmospheric water harvesting: A review of adsorbents and systems

Muhammad Bilal, Muhammad Sultan*, Tatiana Morosuk, Walter Den, Uzair Sajjad, Mian MA Aslam, Muhammad W. Shahzad, Muhammad Farooq

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)
3 Downloads (Pure)


Atmospheric water harvesting (AWH) has been an appealing prospect for decades to overcome water scarcity in remote areas. Adsorption-based AWH technologies have gained popularity due to their adaptability, and applicability using low-grade heat sources. This study presents up-to-date and future possibilities of adsorbents and systems for adsorption-based AWH. In this review, in-depth advancements in adsorbent materials are compartmentalized into adsorption equilibrium/isotherms, adsorption kinetics, and thermal conductivity. Various systems designs and modifications have been reviewed and classified accordingly. Liquid desiccants i.e., CaCl2 and LiCl-based AWH systems produced in between 0.63 to 1.0 kg/m/d of water. Recently, metal-organic frameworks (MOFs) are realized as effective adsorbents for AWH. Their excellent hydrophilicity, structural integrity, and tailorable structures can provide water in high and low relative humidity (RH) areas. MOF-841 and MOF-801 yielded maximum adsorption uptakes at 25 °C i.e., 0.5 and 0.3 g/g, respectively. MOF- 801 showed an excellent water production of 0.2-0.3 L/kg/d at 5%-40% RH and 20-40°C. MOF-303 delivered ~0.7 L/kg/d at 10% RH and 27oC. Cr-soc-MOF-1 and MIL-101(Cr) resulted in maximum adsorption uptakes i.e., 1.9 g/g and 1.4 g/g, respectively. Future possibilities regarding these captivating and emerging adsorption technologies are discussed as concluding remarks.
Original languageEnglish
Article number105961
Number of pages27
JournalInternational Communications in Heat and Mass Transfer
Early online date9 Mar 2022
Publication statusPublished - 1 Apr 2022


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