Efficient Solar‐Driven Water Harvesting from Arid Air with Metal–Organic Frameworks Modified by Hygroscopic Salt

Xu, Jiaxing; Li, Tingxian; Chao, Jingwei; Wu, Si; Yan, Tao; Li, Wenchen; Cao, Biye; Wang, Ruzhu

doi:10.1002/ange.201915170

Cited by 23 publications

(23 citation statements)

References 41 publications

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“…The results showed water harvesting of 0.45–0.7 kg water /kg sorbent . 78 By summarizing the studied literature Figure 4 compares water production capacity (L/kg/day) by various MOFs at RH of 10%–40% and Figure 5 compares the water production capacity (L/kg/day) by various MOFs at RH > 50%. Table 1 shows the operating conditions, water production capacity, structures, and harvesting devices employed MOFs found in the literature.…”

Section: Solid Adsorbentsmentioning

confidence: 99%

An overview of solid and liquid materials for adsorption-based atmospheric water harvesting

Wasti

Sultan

Aleem

et al. 2022

Advances in Mechanical Engineering

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Thermally driven adsorption-based atmospheric water harvesting (AWH) is becoming an emerging technology to provide potable water. In this regard, various adsorbent materials including solid (MOFs, silica-gels, and zeolites), liquid (CaCl2 and LiCl), and composite adsorbents are explored in the literature. This study reviews recent advancements in adsorbent materials based on their water production capacity at different conditions that is air temperature and relative humidity (RH). The MOF of type MIL-101(Cr) shows water production capacity of 3.10 L/m2/day at RH ranging from 10% to 40%. Similarly, Zr-MOF-808 possesses water production capacity of 8.60 L/m2/day at RH more than 50%. Among the studied silica-gels, mesoporous silica-gel shows highest water production capacity that is 1.30 L/m2/day at RH ranging from 10% to 40%. The zeolite yielded water production capacity of 0.94 L/m2/day at RH ranging from 10% to 40%. On the other hand, liquid adsorbents like CaCl2 + cloth, K-LiCl showed water production capacity of 3.02 L/m2/day, and 2.9 g/g/day, respectively at RH of about 70%. Composite adsorbent modified with binary salts and functionalized carbon nanotubes resulted water production capacity of 5.60 g/g at RH of about 35%. The study will be useful to identify the energy-efficient adsorbent for the development of sustainable AWH device.

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Section: Solid Adsorbentsmentioning

confidence: 99%

An overview of solid and liquid materials for adsorption-based atmospheric water harvesting

Wasti

Sultan

Aleem

et al. 2022

Advances in Mechanical Engineering

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“…In contrast to condensation, sorption-based AWH systems can work over a much wider RH range exploiting the hygroscopicity of adsorbents. Typical sorption materials include desiccator salts (17)(18)(19), metal-organic frameworks (20)(21)(22), and thermo-responsive gels (23,24). Strong water a nity contributes to water capture but hampers subsequent water release.…”

Section: Introductionmentioning

confidence: 99%

Radiative Cooling Sorbent towards High Performance All Weather Ambient Water Harvesting

Zhu

Zhang²,

Zhang

et al. 2022

Preprint

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Emerging atmospheric water harvesting (AWH) technologies promise water supply to underdeveloped regions that have no access to liquid water resources. The prevailing AWH systems, including condensation- or sorption-based, mostly rely on a single mechanism and thus have a limited range of working conditions and inferior performance. In this study, we synergistically integrate multiple mechanisms, including thermosorption effect, radiative cooling, and multiscale cellulose-water interactions, and demonstrate a low-cost (~ 4 USD kg− 1) and high performance (up to 6.75 L kg− 1 day− 1 in field tests) AWH system requiring zero active energy input. The proposed system consists of a highly scalable and sustainable cellulose scaffold impregnated with hygroscopic deliquescent lithium chloride (LiCl) salt. Cellulose scaffold and coated LiCl synergistically interact with water at different scales from molecular, to nanometer, and micrometer scales, providing a fast harvesting rate and high yield over a wide operation range. Iterating radiative cooling and solar heating workflow achieves simultaneous enhancement of water capture and release through the so-called temperature-swing strategy. The captured water in return facilitates radiative cooling due to the intrinsically high infrared (IR) emissivity of the LiCl-cellulose composite. With our simple yet effective material design, the AWH working range extends to lower than ~ 10% relative humidity (RH), and the water uptake in the controlled lab test reaches 16 kg kg− 1 at 90% RH (sample at 19°C, i.e. 6°C below 25°C ambient temperature). In addition, we propose a theoretical model capable of elucidating the experimental water uptake curves and demonstrating the synergy among cellulose-LiCl-water-energy interaction. The promising performance emphasizes the potential of involving multiple AWH mechanisms and points to an alternative pathway to stimulate future improvement.

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“…1 Devices for atmospheric water production are based on different physical principles, most common being fog harvesting, dew collection, active cooling of collector surfaces and ab-and adsorption using desiccants. 1,2,3,4 Desiccant-based technology and the development of superior adsorbents has received lots of attention in recent literature 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17 in contrast with the water production process itself. The hygroscopic material is operated in a water adsorption/desorption cycle.…”

Section: Introductionmentioning

confidence: 99%

“…Properties and dimensions of the packed bed of desiccant pellets, adsorption and desorption timing, working capacity, and the temperature and relative humidity profile matter to the performance and make it difficult to compare harvesting efficiencies of different prototype devices investigated under different conditions. 5,6,7,10,11,12,14,20 Water vapor adsorption kinetic studies relevant to the water-from-air harvesting field are scarce. 1 Water vapor adsorption is mostly investigated on the particle level by fitting the kinetic sorption curves with a Fickian diffusion or a linear driving force model to determine diffusion coefficients.…”

Section: Introductionmentioning

confidence: 99%

Non-Isothermal Kinetic Model of Water Vapor Adsorption on a Desiccant Bed for Harvesting Water from Atmospheric Air

Peeters

Verbruggen

Rongé

et al. 2021

Ind. Eng. Chem. Res.

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Desiccants are used in the process industry for the drying of technical gases. An emerging application is fresh water production from water vapor of atmospheric air using adsorbents in a day-night cycle. Water adsorption is performed at night and desorption using solar heat during daytime. In this paper a non-isothermal kinetic model of a packed bed of desiccant pellets is developed to determine possible uptake improvements by elucidating the complex mass and heat transfer interdependent resistances. Shallow beds thinner than 1 cm are required to handle bed diffusion and thermal conduction effects. Options for improvements regarding intragranular water vapor diffusion are limited. The adsorption process quickly becomes convection and radiation limited by the strong exothermicity of water adsorption.

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Efficient Solar‐Driven Water Harvesting from Arid Air with Metal–Organic Frameworks Modified by Hygroscopic Salt

Cited by 23 publications

References 41 publications

An overview of solid and liquid materials for adsorption-based atmospheric water harvesting

An overview of solid and liquid materials for adsorption-based atmospheric water harvesting

Radiative Cooling Sorbent towards High Performance All Weather Ambient Water Harvesting

Non-Isothermal Kinetic Model of Water Vapor Adsorption on a Desiccant Bed for Harvesting Water from Atmospheric Air

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