Tunable LiCl@UiO-66 composites for water sorption-based heat transformation applications

Sun, Yangyang; Spieß, Alex; Jansen, Christian; Nuhnen, Alexander; Gökpinar, Serkan; Wiedey, Raphael; Ernst, Sebastian‐Johannes; Janiak, Christoph

doi:10.1039/d0ta03442h

Cited by 74 publications

(41 citation statements)

References 55 publications

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“…It is worth noting that although composite sorbents with solution leakage may shows very high water uptake at high RH, they are not the true composite sorbent as result of irreversible salt losses and agglomeration of salts once they are applied in large-scale SAWH systems. 50 Therefore, it is highly valuable to develop porous matrix with ultrahigh pore volume to load a high content of salts and store a large amount of adsorbed water for preventing the risk of liquid leakage.…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh solar-driven atmospheric water production enabled by scalable rapid-cycling water harvester with vertically aligned nanocomposite sorbent

Yan

et al. 2021

Energy Environ. Sci.

215

131

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Section: Introductionmentioning

confidence: 99%

Ultrahigh solar-driven atmospheric water production enabled by scalable rapid-cycling water harvester with vertically aligned nanocomposite sorbent

Yan

et al. 2021

Energy Environ. Sci.

215

131

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“…The water uptake at 0.4 relative pressure of the composite ES-47-CaCl 2 , which has uniform mesopores with an average pore size of 10.2 nm and a total pore volume (0.207 cm 3 /g), was 1.7% lower than the water uptake of the composite W-46-CaCl 2 with a smaller pore diameter (8.3 nm) and a larger total pore volume (0.252 cm 3 /g). The water uptake curve of the composite with W-46-γ-Al 2 O 3 and 15 wt% LiCl showed a plateau at 0.038 p/p o due to the formation of lithium chloride hydrate [44], while this plateau was not observed for the composites with lower salt content.…”

Section: Water Sorption Propertiesmentioning

confidence: 89%

Synthesis of Mesoporous γ-Alumina Support for Water Composite Sorbents for Low Temperature Sorption Heat Storage

2021

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The efficiency of thermochemical heat storage is crucially determined by the performance of the sorbent used, which includes a high sorption capacity and a low regeneration temperature. The thermochemical salt hydrate– γ-alumina composite sorbents are promising materials for this application but lack systematic study of the influence of γ-alumina structural properties on the final storage performance. In this study, mesoporous γ-Al2O3 supports were prepared by solvothermal and hydrothermal synthesis containing a block copolymer (F-127) surfactant to design thermochemical CaCl2 and LiCl composite water sorbents. Altering the solvent in the synthesis has a significant effect on the structural properties of the γ-Al2O3 mesostructure, which was monitored by powder XRD, nitrogen physisorption, and SEM. Solvothermal synthesis led to a formation of mesoporous γ-Al2O3 with higher specific surface area (213 m2/g) and pore volume (0.542 g/cm3) than hydrothermal synthesis (147 m2/g; 0.414 g/cm3). The highest maximal water sorption capacity (2.87 g/g) and heat storage density (5.17 GJ/m3) was determined for W-46-LiCl containing 15 wt% LiCl for space heating, while the best storage performance in the sense of fast kinetics of sorption, without sorption hysteresis, low desorption temperature, very good cycling stability, and energy storage density of 1.26 GJ/m3 was achieved by W-46-CaCl2.

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“…Energy capacity increased gradually from 998 ± 20 kJ kg -1 (AF-Ca 1 ) to 1840 ± 20 kJ kg -1 (AF-Ca ). As an increase in the amount of CaCl 2 in the composite enhanced the water sorption capacity and consequently, energy storage capacity in kJ kg -1 [37,39,76]. Besides, the aluminium fumarate composites with higher amounts of salt (AF-Ca 2 and AF-Ca 3 ) show experimental dehydration heats higher than expected by simple addition of the two contributions of the salt and the support (as derived from the experiments performed on CaCl 2 .2H 2 O and AF separately, Table 3).…”

Section: Heat Storage Performance and Water Sorption Propertiesmentioning

confidence: 99%

Water sorption and heat storage in CaCl2 impregnated aluminium fumarate MOFs

Touloumet

Silvester

Bois

et al. 2021

Solar Energy Materials and Solar Cells

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Composite materials based on aluminium fumarate (AF) and CaCl 2 have been developed for the storage of energy from renewable and waste sources. Composite Salt-Porous Matrix (CSPM) was synthesised by impregnating aluminium fumarate MOF host matrix with various relative CaCl 2 salt contents (25-60 wt.%). The resulting CSPMs were fully characterized by X-ray diffraction, N 2 and H 2 O sorption isotherms at −196 and 25 °C, respectively, scanning electron microscopy and thermal analysis. The high surface area of the AF matrix (959 m 2 g -1 ) drastically decreases upon the addition of salt, to about 50 m 2 g -1 . The heat storage performance of the composites was found to depend on the added amount of salt to the MOF matrix, with higher amounts of salt leading to better performance. The maximum water sorption capacity of 0.68 kgH O kg -1 , coupled with a high heat of water sorption (1840 kJ kg -1 ), makes these composites interesting when used at a rehydration level not exceeding CaCl 2 .4H 2 O to avoid any deliquescence and washing out of the salt. A kinetic study of the hydration demonstrated that salt deposition increases the water sorption rate in comparison with the host matrix. Moreover, the impact of salt deposition on the activation energy of dehydration of the host matrix was also determined by applying integral isoconversional methods.

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Tunable LiCl@UiO-66 composites for water sorption-based heat transformation applications

Abstract:
No deliquescence, cycle stability, increased water uptake over a neat MOF and LiCl at low humidity, and high coefficient of performance.

Cited by 74 publications

References 55 publications

Ultrahigh solar-driven atmospheric water production enabled by scalable rapid-cycling water harvester with vertically aligned nanocomposite sorbent

Ultrahigh solar-driven atmospheric water production enabled by scalable rapid-cycling water harvester with vertically aligned nanocomposite sorbent

Synthesis of Mesoporous γ-Alumina Support for Water Composite Sorbents for Low Temperature Sorption Heat Storage

Water sorption and heat storage in CaCl2 impregnated aluminium fumarate MOFs

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Tunable LiCl@UiO-66 composites for water sorption-based heat transformation applications

Abstract: No deliquescence, cycle stability, increased water uptake over a neat MOF and LiCl at low humidity, and high coefficient of performance.

Cited by 74 publications

References 55 publications

Ultrahigh solar-driven atmospheric water production enabled by scalable rapid-cycling water harvester with vertically aligned nanocomposite sorbent

Ultrahigh solar-driven atmospheric water production enabled by scalable rapid-cycling water harvester with vertically aligned nanocomposite sorbent

Synthesis of Mesoporous γ-Alumina Support for Water Composite Sorbents for Low Temperature Sorption Heat Storage

Water sorption and heat storage in CaCl2 impregnated aluminium fumarate MOFs

Contact Info

Product

Resources

About

Abstract:
No deliquescence, cycle stability, increased water uptake over a neat MOF and LiCl at low humidity, and high coefficient of performance.