Water sorption on composite material “zeolite 13X modified by LiCl and CaCl2”

Zhao, Huizhong; Wang, Zhaoyang; Li, Qianwen; Wu, Tianhao; Zhang, Min; Shi, Qiqi

doi:10.1016/j.micromeso.2020.110109

Cited by 50 publications

(23 citation statements)

References 25 publications

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“…This performance is very competitive with the most advanced salt-based sorbents reported so far (Table S1). Different from solid sorbents, whose isotherms usually reach a plateau with increased RH due to the almost non-deformable pores being fully filled (such as zeolites, MOFs), [30,31] PAM-LiCl shows a monotonically increasing water uptake as RH increases thanks to its swelling ability.…”

Section: Resultsmentioning

confidence: 97%

“…This performance is very competitive with the most advanced salt‐based sorbents reported so far (Table S1, Supporting Information). Different from solid sorbents, whose isotherms usually reach a plateau with increased RH due to the almost non‐deformable pores being fully filled (such as zeolites, MOFs), [ 30,31 ] PAM–LiCl shows a monotonically increasing water uptake as RH increases thanks to its swelling ability. From 0% to 90% RH, there is no obvious hysteresis between sorption and desorption, which suggests that moisture sorption in PAM–LiCl is reversible, further showing PAM–LiCl's ability to release most absorbed water.…”

Section: Resultsmentioning

confidence: 99%

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Tailoring the Desorption Behavior of Hygroscopic Gels for Atmospheric Water Harvesting in Arid Climates

Wen

Zhang

et al. 2022

Advanced Materials

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The ubiquitous nature of atmospheric moisture makes it a significant water resource available at any geographical location. Atmospheric water harvesting (AWH) technology, which extracts moisture from ambient air to generate clean water, is a promising strategy to realize decentralized water production. The high water uptake exhibited by salt-based sorbents makes them attractive for AWH, especially in low relative humidity (RH) environments. Salt-based sorbents often have relatively high desorption heat, rendering water release an energy-intensive process. We proposed a hygroscopic gel, PAM hydrogel controlled incorporated with LiCl, capable of effective moisture harvesting from arid environments. The interactions between the hydrophilic hydrogel network and the captured water enable the PAM-LiCl to accumulate more free and weakly-bonded water molecules, significantly lowering the desorption heat compared with conventional neat salt sorbents. Benefiting from the affinity for swelling of the polymer backbones, the developed PAM-LiCl achieves a high water uptake of ca. 1.1 g/g at 20% RH with fast sorption kinetics of ca. 0.008 g g -1 min -1 and further demonstrates a daily water yield up to ca. 7 g/g at this condition. These findings provide a new pathway for synthesis of materials with efficient water absorption/desorption properties, to reach energy-efficient water release for AWH in arid climates.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Tailoring the Desorption Behavior of Hygroscopic Gels for Atmospheric Water Harvesting in Arid Climates

Wen

Zhang

et al. 2022

Advanced Materials

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“…Hygroscopic salts have been demonstrated to incorporate with porous supporting matrices, including silica gels, , zeolites, porous carbon, MOFs, and polymer hydrogels, , as composite moisture-harvesting materials, taking advantages of the stability of the porous matrix and high water capture capacity of hygroscopic salts. For example, by simply impregnating LiCl into the void core of a nanocarbon hollow capsule, a moisture harvester that can capture and release water vapor from ambient air with significantly enhanced kinetics is obtained (Figure a) because of the shortened vapor diffusion length inside the sorbent .…”

Section: Materials and Structural Design Of Moisture Harvesters For Awhmentioning

confidence: 99%

Atmospheric Water Harvesting: A Review of Material and Structural Designs

Zhou

Zhao

et al. 2020

ACS Materials Lett.

337

288

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Atmospheric water harvesting (AWH) emerges as a promising means to overcome the water scarcity of arid regions, especially for inland areas lacking liquid water sources. Beyond conventional system engineering that improves the water yield, novel moisture-harvesting materials provide new aspects to fundamentally promote the AWH technology benefiting from their high tunability and processability. Innovative material and structural designs enable the moisture harvesters with desirable features, such as high water uptake, facile water collection and long-term recyclability, boosting the rapid development of next-generation AWH. In this Perspective, we first illustrate the sorption mechanism, including absorption and adsorption for moisture-harvesting materials and summarize fundamental requirements, as well as design principles of moisture harvesters. Recent progress on material and structural designs of moisture harvesters for AWH is critically discussed. We conclude with prospective directions for nextgeneration moisture harvesters to promote AWH from scientific research to practical application.

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“…They discovered that Y zeolite generated by the ion exchange method had a higher water adsorption capacity, distinctive adsorption energy, and intracrystalline diffusion coefficient than parent zeolite. To synthesize a composite adsorbent, Zhao et al 48 employed a binary salt (CaCl 2 +LiCl) to impregnate 13X zeolite. They discovered that the impregnated salt adsorbent was more sensitive to changes in relative humidity.…”

Section: Composite Adsorbentmentioning

confidence: 99%

Research Progress on Synthesis and Adsorption Properties of Porous Composite Adsorbents for Adsorption Cooling and Desalination Systems: A Mini-review

Xie

Zhang

2023

Energy Fuels

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The adsorption cooling and desalination system is expected to become the mainstream technology of refrigeration and desalination in the future, because it has significant advantages of low temperature driving and low carbon emission. The system based on adsorption technology merits a small environmental impact and low energy consumption, which can help solve the water and energy crises. More importantly, it can use low-grade heat energy to reduce overall carbon emissions in the working process. The adsorbent is the essential component of an adsorption system, and improving the adsorbent is a vital technological advancement for increasing system effectiveness. Porous materials, such as zeolite, silica gel, and metal–organic frameworks, are the most studied adsorption materials in adsorption cooling and desalination systems. They behave differently regarding stability, thermal conductivity, adsorption capacity, and regeneration temperature. The research status of several different adsorbents, such as zeolite, silica gel and metal–organic frameworks, was comprehensively reviewed and compared. In-depth research was done on several composite adsorption materials’ synthesis processes, characterization, and adsorption traits. The obstacles they experienced were then studied, along with the development trend of composite porous adsorbents. The purpose of this study is to provide a reference for researchers committed to developing new adsorption materials under various applications and conditions.

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Water sorption on composite material “zeolite 13X modified by LiCl and CaCl2”

Cited by 50 publications

References 25 publications

Tailoring the Desorption Behavior of Hygroscopic Gels for Atmospheric Water Harvesting in Arid Climates

Tailoring the Desorption Behavior of Hygroscopic Gels for Atmospheric Water Harvesting in Arid Climates

Atmospheric Water Harvesting: A Review of Material and Structural Designs

Research Progress on Synthesis and Adsorption Properties of Porous Composite Adsorbents for Adsorption Cooling and Desalination Systems: A Mini-review

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