A novel metal-organic frameworks based humidity pump for indoor moisture control

Hou, Pumin; Zu, Kan; Qin, Menghao; Cui, Shuqing

doi:10.1016/j.buildenv.2020.107396

Cited by 40 publications

(11 citation statements)

References 35 publications

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“…[ 53 , 54 ] The latter are arranged together to generate a zeolitic architecture delimiting mesoporous cages of 25 and 29 Å, accessible through microporous windows of 5.5 and 8.6 Å, Figure 1 . This MOF has been considered to date for a wide range of potential applications from storage/separation,[ 52 , 55 , 56 ] sensing, [57] catalysis,[ 58 , 59 , 60 , 61 ] heat reallocation,[ 62 , 63 , 64 ] to biomedical applications,[ 43 , 65 , 66 ] etc.…”

Section: Introductionmentioning

confidence: 99%

MOFs with Open Metal(III) Sites for the Environmental Capture of Polar Volatile Organic Compounds

et al. 2022

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Metal-Organic Frameworks (MOFs) with open metal sites (OMS) interact strongly with a range of polar gases/vapors. However, under ambient conditions, their selective adsorption is generally impaired due to a high OMS affinity to water. This led previously to the privilege selection of hydrophobic MOFs for the selective capture/detection of volatile organic compounds (VOCs). Herein, we show that this paradigm is challenged by metal(III) polycarboxylates MOFs, bearing a high concentration of OMS, as MIL-100(Fe), enabling the selective capture of polar VOCs even in the presence of water. With experimental and computational tools, including single-component gravimetric and dynamic mixture adsorption measurements, in situ infrared (IR) spectroscopy and Density Functional Theory calculations we reveal that this adsorption mechanism involves a direct coordination of the VOC on the OMS, associated with an interaction energy that exceeds that of water. Hence, MOFs with OMS are demonstrated to be of interest for air purification purposes.

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Section: Introductionmentioning

confidence: 99%

MOFs with Open Metal(III) Sites for the Environmental Capture of Polar Volatile Organic Compounds

et al. 2022

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“…The MTC is divided into two parts: 3/4 of the surface locates inside the box to adsorb the moisture by the FCL, and the other 1/4 of the surface is exposed to sunlight which is transferred to heat to regenerate the sorbent. In this mode, the humidity inside the box can be pumped to the environment as a humidity pump [54,55] . Notably, most reported humidity pumps in literature use two identical components running in parallel, one for adsorption and another for desorption, which is a batch process.…”

Section: Demonstration Of the Humidity Regulation Performancementioning

confidence: 99%

Mesoporous Silica‐Guided Synthesis of Metal–Organic Framework with Enhanced Water Adsorption Capacity for Smart Indoor Humidity Regulation

Feng

Xue

et al. 2023

Small Structures

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Metal–organic frameworks (MOFs) are promising for indoor humidity regulation due to steep stepwise water uptake and moderate regeneration temperature. Current approaches for performance improvement of MOFs such as impregnating hygroscopic salts and grafting functional groups face the challenge of corrosion and instability. Herein, a template‐guided tuning strategy is proposed to synthesize binary nanocomposite. Highly ordered mesoporous channels of MCM‐41 provide uniform nucleation sites for MOF growth, enabling a 21.5% promotion of specific surface area (3188.14 m2 g−1) and 23.4% improvement of water uptake (1.53 g g−1 at 20°C/90% relative humidity) for the nanocomposite compared with parent MIL‐101(Cr). The fast kinetics and superior stability together guarantee its practical application. Further, a paradigm of continuous indoor humidity regulation driven by sunlight is demonstrated, which realizes smart regulation of the indoor humidity to the human comfort zone (40–60%) with near‐zero energy input.

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“…Fig. 2 shows a photo of a device called humidity pump [4], which can transport moisture through the inverse gradient of vapour concentration, i.e., the vapour can be transferred from a relatively low-humidity space to a high-humidity space. Fig.…”

Section: Applicationsmentioning

confidence: 99%

Novel functional materials for energy-efficient indoor moisture control

Qin

2021

Novel Functional Materials for Energy-Efficient Indoor Moisture Control

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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.

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A novel metal-organic frameworks based humidity pump for indoor moisture control

Cited by 40 publications

References 35 publications

MOFs with Open Metal(III) Sites for the Environmental Capture of Polar Volatile Organic Compounds

MOFs with Open Metal(III) Sites for the Environmental Capture of Polar Volatile Organic Compounds

Mesoporous Silica‐Guided Synthesis of Metal–Organic Framework with Enhanced Water Adsorption Capacity for Smart Indoor Humidity Regulation

Novel functional materials for energy-efficient indoor moisture control

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