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

Bilal, Muhammad; Sultan, Muhammad; Morosuk, Tatiana; Den, Walter; Sajjad, Uzair; Aslam, Mian Muhammad-Ahson; Shahzad, Muhammad Wakil; Farooq, Muhammad

doi:10.1016/j.icheatmasstransfer.2022.105961

Cited by 69 publications

(22 citation statements)

References 192 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When it comes to atmospheric water harvesting, the performance predictions would be more complicated than those of water uptake capacities. A MOF can be deemed suitable for water harvesting when it presents high water-stability, reversible water uptake at low relative humidity, strong enough water adsorption but weak enough interaction to enable nonenergy intensive water desorption, and an S-shaped isotherm. , The isotherm shape depends on pore size and the chemical nature/hydrophilicity of the adsorbent . These criteria cannot be fully assessed using single water molecule adsorption on isolated OLs and MNs.…”

Section: Resultsmentioning

confidence: 99%

Dissecting the Water Uptake Behavior of Metal–Organic Frameworks Using Their Isolated Linkers and Metal Nodes

Keshavarz

2023

Chem. Mater.

View full text Add to dashboard Cite

Metal−organic frameworks (MOFs) have been a center of interest because of their highly diverse structural and physicochemical properties. The study of many MOFs requires periodic calculations. However, isolated models have also been employed in first-principles calculations to study their mechanisms and energy profiles. Following the water adsorption properties of MOF building units, this study determines how far isolated models of MOFs can reproduce experimental observations and where they fail. According to our DFT simulations of water adsorption by 70 common metal nodes and over 110 organic linkers, the isolated models provide some opportunities and limitations. They indicate the water adsorption mechanism and energy of the individual MOF components. They give clues about the water stability of the metal nodes and the degradation pathways. Also, they predict an overall trend for the maximum water uptake capacity. However, they cannot always give an accurate insight into MOF's water adsorption enthalpies, their water harvesting efficiency, their water uptake capacities under varying conditions, and a complete picture of the water uptake mechanism inside MOF pores.

show abstract

Section: Resultsmentioning

confidence: 99%

Dissecting the Water Uptake Behavior of Metal–Organic Frameworks Using Their Isolated Linkers and Metal Nodes

Keshavarz

2023

Chem. Mater.

View full text Add to dashboard Cite

show abstract

“…According to previous reports [163] , there are three main processes for the adsorption of guest molecules by adsorbent: external diffusion; intra-particle distribution; adsorption on the active sites. For vapor adsorption of adsorbent, the intercrystalline diffusion also needs to be considered.…”

Section: Kinetics Process Of Adsorbentmentioning

confidence: 94%

Recent advances in porous adsorbent assisted atmospheric water harvesting: a review of adsorbent materials

2023

Chem Synth

View full text Add to dashboard Cite

Water shortage is an increasing threat to humankind. Porous sorbent assisted atmospheric water harvesting (psaAWH) has emerged as an effective technological countermeasure. In this review, we summarize the types of porous adsorbents used in psaAWH and provide an overview of their states of development. The water adsorption mechanism and the processes associated with each material are analyzed, and the application prospects of the adsorbents are evaluated. The effect of the inherent properties (pore size, functional group, etc.) of the adsorbent on the water harvesting performance is also discussed. Further, we focus on the water adsorption/desorption kinetics of the adsorbents and outline various methods to improve the kinetics. At this stage, there are many strategies for improving the kinetics of the adsorbent, which in turn influences the adsorption process and intra/inter-crystalline diffusion. However, there is still limited research on the transport of water molecules in microporous adsorbents for psaAWH. Thus, this aspect is re-examined herein from a new perspective (superfluidity) in the review. Based on the discussion, we can reasonably infer that water molecule superfluidity can exist in nanoconfined channels, thus promoting the rapid transport of water molecules. The formation of water superfluidity is a feasible strategy for improving the intracrystalline diffusion of the psaAWH adsorbent. Finally, we consider the future developments and challenges of psaAWH in detail. We think this review can serve as a guide for further research in this ever-expanding field.

show abstract

“…In particular, composite hygroscopic materials doped with photothermal materials have become a hot research topic. By combining the research status of SAWH, it is not difficult to find that the ideal hygroscopic material should have the following characteristics: (1) high water absorption, low water release energy, and fast water collection-release rate; (2) high cycle stability, simple process, low cost, environmental protection, and easy-to-scale-up production; and (3) broadband optical absorption. , Based on the above points, composite hygroscopic materials are more commonly used in the practical application of atmospheric water harvesting because zeolite, silica gel, , Metal–organic frameworks (MOFs), , and other single hygroscopic materials have various problems such as easy agglomeration, difficult regeneration, difficult desorption, and difficult synthesis. Researchers have continuously optimized the hygroscopic materials and designed and improved the water collecting device to better realize the application of SAWH. − Considering that hygroscopic salts such as LiCl and CaCl 2 have significant water capture capacity in a wide range of relative humidities, , the combination of hygroscopic salts with porous materials and photothermal conversion materials is an important development trend for the preparation of composite hygroscopic materials, such as LiCl@MIL101(Cr), PDMAPS/CNT/LiCl, PAM-CNT-CaCl 2, LiCl/MgSO 4 /ACF, LiCl@rGO-SA, and so on.…”

Section: Introductionmentioning

confidence: 99%

“…By combining the research status of SAWH, it is not difficult to find that the ideal hygroscopic material should have the following characteristics: (1) high water absorption, low water release energy, and fast water collection-release rate; (2) high cycle stability, simple process, low cost, environmental protection, and easy-to-scale-up production; and (3) broadband optical absorption. 21,22 Based on the above points, composite hygroscopic materials are more commonly used in the practical application of atmospheric water harvesting 23 because zeolite, 24 silica gel, 25,26 Metal− organic frameworks (MOFs), 27,28 and other single hygroscopic materials have various problems such as easy agglomeration, difficult regeneration, difficult desorption, and difficult synthesis. Researchers have continuously optimized the hygroscopic materials and designed and improved the water collecting device to better realize the application of SAWH.…”

Section: ■ Introductionmentioning

confidence: 99%

Guar Gum-Based Macroporous Hygroscopic Polymer for Efficient Atmospheric Water Harvesting

Li,

Xing,

Qiao

et al. 2023

Langmuir

View full text Add to dashboard Cite

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

Cited by 69 publications

References 192 publications

Dissecting the Water Uptake Behavior of Metal–Organic Frameworks Using Their Isolated Linkers and Metal Nodes

Dissecting the Water Uptake Behavior of Metal–Organic Frameworks Using Their Isolated Linkers and Metal Nodes

Recent advances in porous adsorbent assisted atmospheric water harvesting: a review of adsorbent materials

Guar Gum-Based Macroporous Hygroscopic Polymer for Efficient Atmospheric Water Harvesting

Contact Info

Product

Resources

About