Assessing the suitability of alkali-activated metakaolin geopolymer for thermochemical heat storage

Ke, Xinyuan; Baki, Vahiddin Alperen

doi:10.1016/j.micromeso.2021.111329

Cited by 12 publications

(1 citation statement)

References 62 publications

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“…The complete water absorption process of inorganic salts can be considered as a three-phase process involving chemisorption (mainly energy storage part), gas/liquid/solid three-phase liquid hydrolysis/crystallization, liquid/gas absorption and other processes. Most scholars mainly pay attention to the total amount of water vapor adsorption of hygroscopic salt materials to increase the HSD, [32][33][34] but rarely pay attention to the adsorption amount per unit time (sorption kinetics) on materials' use. In some industrial waste heat recycle, a large amount of waste heat needs to be treated or recovered promptly.…”

Section: Introductionmentioning

confidence: 99%

Performance investigation of LiCl·H₂O-γ-Al₂O₃ composite materials for low-grade heat storage

Li,

Zeng,

Huang

et al. 2023

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Performance investigation of LiCl·H₂O-γ-Al₂O₃ composite materials for low-grade heat storage

Li,

Zeng,

Huang

et al. 2023

RSC Adv.

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High‐performance geopolymer from brick wastes and metakaolin: Alkali treatment optimization, phase transformation, and property analysis

Moujoud,

Sair,

Ousaleh

et al. 2024

Structural Concrete

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This study presents a cost‐effective and eco‐friendly method to produce aluminosilicate materials using red brick waste (RBW) and metakaolin (MK) as silica and alumina precursors. RBW was subjected to alkaline fusion to increase its dissolution for geopolymerization reaction. Response surface methodology was used to investigate the effect of NaOH concentration and fusion temperature on the leaching of silica and alumina from RBW. The microstructure of the alkali‐fused RBW was analyzed using x‐ray diffraction and Fourier‐transform infrared spectroscopy. Response surface methodology confirmed and revealed that higher NaOH concentration (14 M) and a temperature of 660°C favored solubilized phase development, resulting in 85% and 50% leached silica and alumina, respectively. These optimized parameters were then employed to prepare geopolymer materials with different proportions of alkali‐fused RBW and MK, using NaOH and Na2SiO3 as the alkaline solution. The elaborated geopolymer binders were characterized using various techniques such as x‐ray diffraction (DRX), Fourier‐transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermal conductivity (λ), and fire resistance. The results showed that geopolymers containing 30 wt.% of alkali‐fused RBW exerted good mechanical and thermal insulation properties compared to conventional cement materials. However, excessive RBW addition causes negative effects. In addition, it was found that the blended geopolymers exhibited an increase in heat release rate (HRR), resulting in reduced fire resistance due to the presence of unreacted NaOH. Overall, these findings confirmed the potential sustainable use of RBW to partially replace MK in geopolymer as a material for building construction.

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The Effect of Salt-Impregnation on Thermochemical Properties of a Metakaolin Geopolymer Composite for Thermal Energy Storage

Skevi¹,

Ke²,

Elvins³

et al. 2023

RILEM Bookseries

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Assessing the suitability of alkali-activated metakaolin geopolymer for thermochemical heat storage

Cited by 12 publications

References 62 publications

Performance investigation of LiCl·H₂O-γ-Al₂O₃ composite materials for low-grade heat storage

Performance investigation of LiCl·H₂O-γ-Al₂O₃ composite materials for low-grade heat storage

High‐performance geopolymer from brick wastes and metakaolin: Alkali treatment optimization, phase transformation, and property analysis

The Effect of Salt-Impregnation on Thermochemical Properties of a Metakaolin Geopolymer Composite for Thermal Energy Storage

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Assessing the suitability of alkali-activated metakaolin geopolymer for thermochemical heat storage

Cited by 12 publications

References 62 publications

Performance investigation of LiCl·H2O-γ-Al2O3 composite materials for low-grade heat storage

Performance investigation of LiCl·H2O-γ-Al2O3 composite materials for low-grade heat storage

High‐performance geopolymer from brick wastes and metakaolin: Alkali treatment optimization, phase transformation, and property analysis

The Effect of Salt-Impregnation on Thermochemical Properties of a Metakaolin Geopolymer Composite for Thermal Energy Storage

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Product

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Performance investigation of LiCl·H₂O-γ-Al₂O₃ composite materials for low-grade heat storage

Performance investigation of LiCl·H₂O-γ-Al₂O₃ composite materials for low-grade heat storage