Development of diatomite-based shape-stabilized composite phase change material for use in floor radiant heating

Xu, Tao; Wu, Fengping; Zou, Ting; Li, Jintian; Yang, Jing; Zhou, Xiaoqing; Liu, Detao; Bie, Yu

doi:10.1016/j.molliq.2021.118372

Cited by 29 publications

(4 citation statements)

References 33 publications

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“…For natural mineral materials (bentonite, goethite, kaolinite, attapulgite (palygorskite), expanded perlite, sepiolite, diatomite, vermiculite (expanded), and hydroxyapatite, among others), their cost-effectiveness, ease of access, and (chain) layered structure (Figure 14g for attapulgite [113] and Figure 14h for expanded vermiculite [114]) provide many adsorption sites. In particular, the diatomite presented a flat round shape with a large number of pores inside the particles (Figure 14i) and excellent hydrophilicity [115], promoting the mass transfer of water vapor and significantly increasing the water uptake capacity [115][116][117][118]. Hydroxyapatite (HAP), as a member of the calcium phosphate family, has a higher heat transfer performance (a thermal conductivity of 0.15-0.2 K) [119]), and biocompatibility with surrounding materials.…”

Section: Physics and Chemical Characterization Of Host Matricesmentioning

confidence: 99%

“…Pore volume: 2.8 cm 3 /g [146] Specific surface area: 18 m 2 /g [146] Thermal conductivity: 0.065 W/(m•K) [147] Average pore diameter: 600 nm [147] Bulk density: 127.74 kg/m 3 [60] Adsorption capacity: 0.03 g•g −1 [60] Cost-effective [148] Excellent hydrophilic [117] Weak hydrothermal stability [60] Expanded perlite Pore volume: 3.7 cm 3 /g [116] Specific surface area: 20.29 m 2 /g [116] Average pore diameter: 720 nm [116] Adsorption capacity: 0.17 g•g −1 [116] Attapulgite Specific surface area: 98 m 2 /g [148] Average pore diameter: 64 nm [148] Diatomite Pore volume: 0.0438 cm 3 /g [117] Specific surface area: 22 m 2 /g [117] Average pore diameter: 6.7042 nm [117] Bulk density: 1900-2400 kg/m 3 [149] Speiolite Pore volume: 0.19 cm 3 /g [118] Specific surface area: 58.68 m 2 /g [118] Average pore diameter: 17.68 nm [118] Hydroxyapatite Pore volume: 0.664 cm 3 /g [150] Specific surface area: 113.2 m 2 /g [150] Thermal conductivity: 0.15-0.2 W/(m•K) [119] Adsorption capacity: 0.039 g•g −1 [119] Superior compatibility [150] Higher thermal conductivity [119] Mesoporous Silicates (silica gel, silica aerogels, Wakkanai siliceous shale, MCM-41, SBA-15, etc. )…”

Section: Expanded Vermiculitementioning

confidence: 99%

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Salt Hydrate Adsorption Material-Based Thermochemical Energy Storage for Space Heating Application: A Review

et al. 2023

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Recent years have seen increasing attention to TCES technology owing to its potentially high energy density and suitability for long-duration storage with negligible loss, and it benefits the deployment of future net-zero energy systems. This paper provides a review of salt hydrate adsorption material-based TCES for space heating applications at ~150 °C. The incorporation of salt hydrates into a porous matrix to form composite materials provides the best avenue to overcome some challenges such as mass transport limitation and lower thermal conductivity. Therefore, a systematic classification of the host matrix is given, and the most promising host matrix, MIL-101(Cr)(MOFs), which is especially suitable for loading hygroscopic salt, is screened from the perspective of hydrothermal stability, mechanical strength, and water uptake. Higher salt content clogs pores and, conversely, reduces adsorption performance; thus, a balance between salt content and adsorption/desorption performance should be sought. MgCl2/rGOA is obtained with the highest salt loading of 97.3 wt.%, and the optimal adsorption capacity and energy density of 1.6 g·g−1 and 2225.71 kJ·kg−1, respectively. In general, larger pores approximately 8–10 nm inside the matrix are more favorable for salt dispersion. However, for some salts (MgSO4-based composites), a host matrix with smaller pores (2–3 nm) is beneficial for faster reaction kinetics. Water molecule migration behavior, and the phase transition path on the surface or interior of the composite particles, should be identified in the future. Moreover, it is essential to construct a micromechanical experimental model of the interface.

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Section: Physics and Chemical Characterization Of Host Matricesmentioning

confidence: 99%

Section: Expanded Vermiculitementioning

confidence: 99%

Salt Hydrate Adsorption Material-Based Thermochemical Energy Storage for Space Heating Application: A Review

et al. 2023

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“…In addition, if the phase transition of the PCM in question is solid to liquid, it will probably be necessary to use a material that acts as a capsule or support for the PMC to prevent its leakage, which could even hurt the mechanical properties of the pavement [ 12 , 13 ]. In this case, the literature fundamentally presents two possibilities: (i) encapsulation (by melamine–formaldehyde resin [ 14 ], acrylic-based polymers [ 15 ], and CaCO 3 [ 16 ], among others) or (ii) impregnation using porous materials (silica fume [ 17 ], diatomite [ 18 ], expanded graphite, and others [ 19 ]) or crystalline/lamellar materials (expanded graphite [ 20 ], reduced graphene oxide [ 21 ], and montmorillonite [ 22 ] ( Figure 1 ).…”

Section: Introductionmentioning

confidence: 99%

Advancements in Phase Change Materials in Asphalt Pavements for Mitigation of Urban Heat Island Effect: Bibliometric Analysis and Systematic Review

Pinheiro,

Landi,

Lima

et al. 2023

Sensors

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This research presents a dual-pronged bibliometric and systematic review of the integration of phase change materials (PCMs) in asphalt pavements to counteract the urban heat island (UHI) effect. The bibliometric approach discerns the evolution of PCM-inclusion asphalt research, highlighting a marked rise in the number of publications between 2019 and 2022. Notably, Chang’an University in China has emerged as a leading contributor. The systematic review addresses key questions like optimal PCM types for UHI effect mitigation, strategies for PCM leakage prevention in asphalt, and effects on mechanical properties. The findings identify polyethylene glycols (PEGs), especially PEG2000 and PEG4000, as prevailing PCMs due to their wide phase-change temperature range and significant enthalpy during phase transitions. While including PCMs can modify asphalt’s mechanical attributes, such mixtures typically stay within performance norms. This review emphasises the potential of PCMs in urban heat management and the need for further research to achieve optimal thermal and mechanical balance.

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“…Usually, diatomite mined from geological deposits must be purified before being used; thermal pre-calcination and HCl washing are the treatments generally used to increase powder quality and to make the biomaterial inert as filter support [ 29 ]. In the construction industry, diatomite finds use in lightweight brick manufacturing [ 30 , 31 ] to produce ceramics [ 32 , 33 , 34 ] for the improvement of MOC composites [ 35 ] and as a part of shape-stabilized phase change materials [ 36 , 37 ]. It is also applied in designing and developing high-temperature resistant and thermal insulation materials [ 38 , 39 ] and as lightweight aggregate manufacturing mortar and concrete [ 40 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

Diatomaceous Earth—Lightweight Pozzolanic Admixtures for Repair Mortars—Complex Chemical and Physical Assessment

et al. 2022

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The presented research is focused on the complex assessment of three different types of diatomaceous earth and evaluation of their ability for application as pozzolana active admixtures applicable in the concrete industry and the production of repair mortars applicable for historical masonry. The comprehensive experimental campaign comprised chemical, mineralogical, microstructural, and physical testing of raw materials, followed by the analyses and characterization of pozzolanic activity, rheology and heat evolution of fresh blended pastes, and testing of macrostructural and mechanical parameters of the hardened 28-days and 90-days samples. The obtained results gave evidence of the different behavior of researched diatomaceous earth when mixed with water and Portland cement. The differences in heat evolution, initial and final setting time, porosity, density, and mechanical parameters were identified based on chemical and phase composition, particle size, specific surface, and morphology of diatomaceous particles. Nevertheless, the researched mineral admixtures yielded a high strength activity index (92.9% to 113.6%), evinced their pozzolanic activity. Three fundamental factors were identified that affect diatomaceous earth’s contribution to the mechanical strength of cement blends. These are the filler effect, the pertinent acceleration of OPC hydration, and the pozzolanic reaction of diatomite with Portland cement hydrates. The optimum replacement level of ordinary Portland cement by diatomaceous earth to give maximum long-term strength enhancement is about 10 wt.%., but it might be further enhanced based on the properties of pozzolan.

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Development of diatomite-based shape-stabilized composite phase change material for use in floor radiant heating

Cited by 29 publications

References 33 publications

Salt Hydrate Adsorption Material-Based Thermochemical Energy Storage for Space Heating Application: A Review

Salt Hydrate Adsorption Material-Based Thermochemical Energy Storage for Space Heating Application: A Review

Advancements in Phase Change Materials in Asphalt Pavements for Mitigation of Urban Heat Island Effect: Bibliometric Analysis and Systematic Review

Diatomaceous Earth—Lightweight Pozzolanic Admixtures for Repair Mortars—Complex Chemical and Physical Assessment

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