Evaluation of ad/desorption dynamics of S-PEEK/Zeolite composite coatings by T-LTJ method

Palamara, Davide; Palomba, Valeria; Calabrese, Luigi; Frazzica, Andrea

doi:10.1016/j.applthermaleng.2022.118262

Cited by 5 publications

(1 citation statement)

References 37 publications

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“…The choice of using a water vapor-permeable matrix was similarly proposed in [ 25 ], where a new adsorbent composite coating constituted by a SAPO-34 powder filled in a sulfonated polyether ether ketone (S-PEEK) matrix is proposed for thermally efficient adsorption heat pumps. The results evidenced that the S-PEEK polymer does not hinder the adsorption/desorption capacity of the SAPO-34 filler, indicating that the proposed technology is promising for practical application in adsorption heat pumps [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Sulfonated-Recycled-PEEK as Matrix of Water Vapor Adsorbent SAPO-34 Based Composite Coatings for Adsorption Heat Pumps: Mechanical and Thermochemical Characterization

Palamara

Calabrese

2022

Materials

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In this work, a composite adsorbent coating constituted by high SAPO 34 content and a sulfonated recycled poly (ether ether ketone) was investigated for adsorption heat pump technology. Specifically, the effect of polymer recycling on mechanical and thermal properties, as well as on water vapor adsorption and desorption performance, has been investigated. The degree of sulfonation obtained after 48 h of reaction remained approximately unaltered. The degradation of the polymer due to recycling anticipates the degradation of the C-C bonds of the polymer by about 20 °C without affecting the temperature at which the sulfonic groups degrade. From the mechanical point of view, the coating containing 90% zeolite, due to the use of recycled PEEK, evidenced a worsening of only 11.8% in scratch resistance compared to the virgin one, whereas the adhesive strength exhibited an increase of about 23.2% due to better miscibility of the sulfonated recycled polymer. Adsorption/desorption isobars show an almost similar adsorption capacity of the coating produced with recycled polymer compared to the virgin one, confirming that the water vapor diffusion is not hindered by the polymer matrix during the adsorption/desorption process.

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Section: Introductionmentioning

confidence: 99%

Sulfonated-Recycled-PEEK as Matrix of Water Vapor Adsorbent SAPO-34 Based Composite Coatings for Adsorption Heat Pumps: Mechanical and Thermochemical Characterization

Palamara

Calabrese

2022

Materials

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The thermophysical properties of a promising composite adsorbent based on multi-wall carbon nanotubes for heat storage

Grekova,

Strelova,

Solovyeva

et al. 2024

Mater Renew Sustain Energy

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The use of energy from alternative energy sources as well as the use of waste heat are key elements of an efficient energetics. Adsorption heat storage is a technology that allows solving such problems. For the successful operation of an adsorption heat accumulator, it is necessary to analyze the thermophysical characteristics of the system under the conditions of the operating cycle: heat transfer coefficient adsorbent-metal (α2), overall (U) and global (UA) heat transfer coefficients of heat exchanger. Multi-walled carbon nanotube (MWCNT) composites are very promising for adsorption-based renewable energy storage and conversion technologies. In this work at the stage of heat release, α2 was measured by the large pressure jump (LPJ) method, at the stage of heat storage by large temperature jump method (LTJ), which made it possible to obtain thermophysical characteristics that corresponded to the implementation of the real working cycle as much as possible. The heat transfer coefficients for a pair of adsorbent LiCl/MWCNT—methanol are measured for the first time under the conditions of a daily heat storage cycle both at the sorption stage (α2 = 190 W/m2K) and at the desorption stage (α2 = 170 W/m2K).

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Enhancing solar-driven atmospheric water harvesting by a bilayer macroporous hydrogel

Li,

Deng,

2024

Applied Thermal Engineering

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Evaluation of ad/desorption dynamics of S-PEEK/Zeolite composite coatings by T-LTJ method

Cited by 5 publications

References 37 publications

Sulfonated-Recycled-PEEK as Matrix of Water Vapor Adsorbent SAPO-34 Based Composite Coatings for Adsorption Heat Pumps: Mechanical and Thermochemical Characterization

Sulfonated-Recycled-PEEK as Matrix of Water Vapor Adsorbent SAPO-34 Based Composite Coatings for Adsorption Heat Pumps: Mechanical and Thermochemical Characterization

The thermophysical properties of a promising composite adsorbent based on multi-wall carbon nanotubes for heat storage

Enhancing solar-driven atmospheric water harvesting by a bilayer macroporous hydrogel

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