Precise humidity control materials for autonomous regulation of indoor moisture

Qin, Menghao; Hou, Pumin; Wu, Zhimin; Wang, Juntao

doi:10.1016/j.buildenv.2019.106581

Cited by 70 publications

(22 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[13][14][15][16][17][18][19][20][21] One of the motivations behind this study was to investigate molecular solids toward water vapor adsorption which has numerous practical implications. Especially, the adsorptive removal or harvest of atmospheric water vapor is a topic of increasing significance, [33][34][35][36][37] and several MOFs are being studied intensively as adsorbents for the production of fresh water in arid regions, [38][39] for indoor moisture BULLETIN OF THE KOREAN CHEMICAL SOCIETY control 40 or for adsorption heat pump systems. 41 ZF-3 solids, as molecular materials, are interesting in these points of view because the nanometer-sized cluster possesses many polar groups that can interact with water molecules.…”

Section: Resultsmentioning

confidence: 99%

Static and Dynamic Adsorptions of Water Vapor by Cyclic [Zr₃₆] Clusters: Implications for Atmospheric Water Capture Using Molecular Solids

Choi

Moon

Chun

2020

Bulletin Korean Chem Soc

View full text Add to dashboard Cite

A 36-nuclear Zr(IV) cluster based on six [Zr 6 O 4 (OH) 4 ] units is found to form three different crystal structures depending on synthesis conditions. The cubic phase (ZF-3c) is obtained when the cyclic clusters are interlinked by Na + or K + ions. In the absence of alkali metal ions, either tetragonal (ZF-3t) or hexagonal (ZF-3h) packing structures are formed. All the solids remain crystalline after evacuation, and ZF-3h possesses a permanent porosity. Upon repeated adsorptions of water vapor, the three different molecular solids comprising the same building blocks turn amorphous; however, overall uptake properties are not deteriorated and reproducible isotherms are observed featuring fast uptake at low relative humidity and unrestricted uptake at RH > 90%. A good reproducibility has also been established in cyclic adsorptiondesorption measured under dynamic flow conditions, and, especially ZF-3t displays the working capacity 2.7 times that of zeolite 4A thanks to the fast desorption kinetics.

show abstract

Section: Resultsmentioning

confidence: 99%

Static and Dynamic Adsorptions of Water Vapor by Cyclic [Zr₃₆] Clusters: Implications for Atmospheric Water Capture Using Molecular Solids

Choi

Moon

Chun

2020

Bulletin Korean Chem Soc

View full text Add to dashboard Cite

show abstract

“…The versatility of MOF structures permitted the further design and preparation of adsorbents with such specific requirements. The Fe-based MOF assembled from 3,3′,5,5′-tetrakis(4-carboxyphenyl)- p -terphenyl (H 4 TCPT) and in situ formed trinuclear cluster, denoted MOF-PHCM, is the other reported MOF that exhibited water sorption isotherm for comfortable indoor or confined space humidity control between 40% and 65% RH . Very recently, Zhu et al also prepared UiO-67 type single and mixed-linker MOFs by replacing the original biphenyldicarboxylate (BPDC) linker of UiO-67 with other functionalized BPDC linkers carrying hydrophobic (−CH 3 ) and hydrophilic (−NH 2 , −OH, or −COOH) moieties.…”

Section: Water Adsorption By Different Classes Of Porous Materialsmentioning

confidence: 99%

Water Vapor Adsorption by Porous Materials: From Chemistry to Practical Applications

et al. 2022

View full text Add to dashboard Cite

In recent years, the deployment of chemically stable physisorbents in various water sorption-related applications has received significant attention. Depending on their structural features, different types of porous sorbents manifest distinct shapes of water sorption isotherms. The translation of water sorption profiles of adsorbents into appropriate practical applications is yet to be established. This Review gives an overview of the water adsorption studies conducted on different hydrolytically stable porous solids selected from different classes of solid-state materials (organic, inorganic, and hybrid materials). Brief analyses of the water sorption behavior and the relations to materials' intrinsic structural features are made. Based on adsorbents' observed water sorption characteristics, the prospects of their practical/commercial deployment in chosen sectors are also commented. The criteria for using porous adsorbents in specific water-related technologies, which can help guide the design and assembly of suitable water adsorbents, are also reviewed. In addition, the challenges that need to be overcome in developing efficient water vapor adsorbents for a given application are also discussed.

show abstract

“…Recent studies show that metal-organic frameworks are also promising adsorbents for water vapour [1,2]. Recently, a new type of MOF based desiccant was prepared at DTU [3]. The material has an S-shape isotherm, large BET surface area and pore volume, and very high water vapor uptake of 1.62 g/g at 80% RH.…”

Section: Metal-organic Framework (Mofs) Based Desiccantsmentioning

confidence: 99%

“…Fig. 1 shows the sorption isotherms of MOF based desiccant for autonomous regulation of indoor humidity [3]. The material can rapidly adsorb moisture as the indoor relative humidity exceeds 60%, and release moisture as relative humidity drops below 45%.…”

Section: Applicationsmentioning

confidence: 99%

Novel functional materials for energy-efficient indoor moisture control

Qin

2021

Novel Functional Materials for Energy-Efficient Indoor Moisture Control

Self Cite

View full text Add to dashboard Cite

The regulation of the latent load remains a critical problem for built environment control. Unlike the traditional vapor compression system that features high-energy consumption and environmental-unfriendly processes, desiccants represent an alternative air-conditioning method that takes advantage of the low-grade energy, decreases the energy consumption and even employs use of water vapor. However, for a long time, solid desiccants that can be used for built environment control are very limited. Traditional/conventional desiccants, such as silica gel and zeolite, have relatively low water vapor uptake and high energy demand for desorption, which render them unsuitable for energy-efficient humidity control. In the paper, two types of novel functional materials, i.e. metal-organic frameworks (MOFs) and polymer hydrogels (pHyG) developed at DTU are presented. The hygrothermal and sorption properties of these materials are measured. Both MOFs and pHyG have high water vapor uptake and low regeneration temperature and could be used for energy-efficient indoor moisture control. Some examples of the applications of these new materials developed at DTU are presented. We conclude with prospective directions for next generation solid desiccants to promote energy-efficient moisture control from scientific research to practical application. Peer-review under the responsibility of the organizing committee of the ICMB21.

show abstract

Precise humidity control materials for autonomous regulation of indoor moisture

Cited by 70 publications

References 40 publications

Static and Dynamic Adsorptions of Water Vapor by Cyclic [Zr₃₆] Clusters: Implications for Atmospheric Water Capture Using Molecular Solids

Static and Dynamic Adsorptions of Water Vapor by Cyclic [Zr₃₆] Clusters: Implications for Atmospheric Water Capture Using Molecular Solids

Water Vapor Adsorption by Porous Materials: From Chemistry to Practical Applications

Novel functional materials for energy-efficient indoor moisture control

Contact Info

Product

Resources

About

Precise humidity control materials for autonomous regulation of indoor moisture

Cited by 70 publications

References 40 publications

Static and Dynamic Adsorptions of Water Vapor by Cyclic [Zr36] Clusters: Implications for Atmospheric Water Capture Using Molecular Solids

Static and Dynamic Adsorptions of Water Vapor by Cyclic [Zr36] Clusters: Implications for Atmospheric Water Capture Using Molecular Solids

Water Vapor Adsorption by Porous Materials: From Chemistry to Practical Applications

Novel functional materials for energy-efficient indoor moisture control

Contact Info

Product

Resources

About

Static and Dynamic Adsorptions of Water Vapor by Cyclic [Zr₃₆] Clusters: Implications for Atmospheric Water Capture Using Molecular Solids

Static and Dynamic Adsorptions of Water Vapor by Cyclic [Zr₃₆] Clusters: Implications for Atmospheric Water Capture Using Molecular Solids