Experimental Comparison of Innovative Composite Sorbents for Space Heating and Domestic Hot Water Storage

Brancato, Vincenza; Gordeeva, Larisa G.; Caprì, Angela; Grekova, Alexandra D.; Frazzica, Andrea

doi:10.3390/cryst11050476

Cited by 15 publications

(4 citation statements)

References 42 publications

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“…From the first studies on the manufacture of such sorbents by impregnating a porous matrix with hygroscopic salts [19,20], numerous combinations of salts and porous carriers with enhanced sorption capacity have been developed. Active components include calcium and lithium chlorides, lithium bromide, magnesium and sodium sulfates; porous matrices include silica gels, aluminum oxide, synthetic carbon materials, vermiculite, and zeolites [24][25][26][27][28][29]. As proved, this is an effective way to create innovative materials with specified sorption properties.…”

Section: Introductionmentioning

confidence: 99%

“…Encapsulated sorbents represent a new level of composite materials with enhanced physicochemical properties and performance characteristics. Similarly to two-component salt-in-porous-matrix composites [19][20][21][22][23][24][25][26][27][28][29], Yang et al [32] developed a solid sorbent obtained by encapsulating the hygroscopic salt of lithium chloride (LiCl) inside microsized hollow-structured SiO 2 , which demonstrated a record high water vapor sorption capacity.…”

Section: Introductionmentioning

confidence: 99%

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The Preparation and Contact Drying Performance of Encapsulated Microspherical Composite Sorbents Based on Fly Ash Cenospheres

Fomenko,

Anshits,

Solovyov

et al. 2024

Molecules

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Sorption technologies are essential for various industries because they provide product quality and process efficiency. New encapsulated microspherical composite sorbents have been developed for resource-saving contact drying of thermolabile materials, particularly grain and seeds of crops. Magnesium sulfate, known for its high water capacity, fast sorption kinetics, and easy regeneration, was used as an active moisture sorption component. To localize the active component, porous carriers with an accessible internal volume and a perforated glass–crystalline shell were used. These carriers were created by acid etching of cenospheres with different structures isolated from fly ash. The amount of magnesium sulfate included in the internal volume of the microspherical carrier was 38 wt % for cenospheres with ring structures and 26 wt % for cenospheres with network structures. Studies of the moisture sorption properties of composite sorbents on wheat seeds have shown that after 4 h of contact drying the moisture content of wheat decreases from 22.5 to 14.9–15.5 wt %. Wheat seed germination after sorption drying was 95 ± 2%. The advantage of composite sorbents is the encapsulation of the desiccant in the inner volume of perforated cenospheres, which prevents its entrainment and contamination and provides easy separation and stable sorption capacity in several cycles.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Preparation and Contact Drying Performance of Encapsulated Microspherical Composite Sorbents Based on Fly Ash Cenospheres

Fomenko,

Anshits,

Solovyov

et al. 2024

Molecules

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show abstract

“…The composite showed water uptake of 0.53 g/g, mass energy storage density of 0.46 kWh/kg and volumetric energy storage density of 105.36 kWh/m 3 . Brancato 114-2 et al prepared a vermiculite and inorganic salt based composite by a dry impregnation method for thermal energy storage [12]. Their results demonstrated slower interaction kinetics in the vermiculite-based composites, due to the larger size of salt grains embedded in the pores, while promising volumetric energy storage density of 194.44 kWh/m 3 was observed.…”

Section: Introductionmentioning

confidence: 99%

Vermiculite/LiCl Composite for Adsorption Thermal Energy Storage

Shervani¹,

Strong²,

Tezel³

2023

Proceedings of the 7th International Conference on Energy Harvesting, Storage, and Transfer (EHST 2023)

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Sorption based thermal energy storage systems are amassing more attention of the researchers, due to their high energy storage density, stability and cyclic performance. Several materials have been used for adsorption based thermal energy storage technology. One promising group of materials are hygroscopic salts (e.g. metal chlorides), due to their high energy storage density and water vapour sorption capacity. However, hygroscopic salts are difficult to handle due to deliquescence and issues of cyclic stability. One method of stabilizing hygroscopic salts is to impregnate a host material with them to form a salt-in-matrix composite. Vermiculite is considered to be a good candidate as a host material for salt-in-matrix composites for thermal energy storage due to its high porosity, high stability, and low cost. Pure vermiculite has low energy storage density in comparison to traditional adsorbents. However, when vermiculite is impregnated with LiCl energy storage density values of up to 159 kWh/m 3 can be achieved at 50% relative humidity after a regeneration temperature of 120°C. This paper includes the synthesis and characterization, e.g. structural and thermal energy storage properties of the vermiculite based composite.

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“…Fewer TCES studies have been carried out on the development of the active porous support, which can be involved in the adsorption process to further improve the storage performance in the context of increased sorption capacity by adjusting the chemical composition of the support and creating additional adsorption sites by using different synthesis routes [5][6][7][8]. Porous supports for TCM composites found in the literature are mainly commercial materials such as Zeolites [9], silica gels [10], activated alumina [11], and vermiculite [12], while recently, novel supports such as MOFs [13], polymeric foam [14], alginate [15], and porous carbon structures [16][17][18] have been used.…”

Section: Introductionmentioning

confidence: 99%

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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Experimental Comparison of Innovative Composite Sorbents for Space Heating and Domestic Hot Water Storage

Cited by 15 publications

References 42 publications

The Preparation and Contact Drying Performance of Encapsulated Microspherical Composite Sorbents Based on Fly Ash Cenospheres

The Preparation and Contact Drying Performance of Encapsulated Microspherical Composite Sorbents Based on Fly Ash Cenospheres

Vermiculite/LiCl Composite for Adsorption Thermal Energy Storage

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

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