Tremendous enhancement of heat storage efficiency for Mg(OH)2-MgO-H2O thermochemical system with addition of Ce(NO3)3 and LiOH

Li, Meng-Tian; Li, Yating; Sun, Lu; Xu, Zhibin; Zhao, Yun; Meng, Zihui; Wu, Qin‐Pei

doi:10.1016/j.nanoen.2020.105603

Cited by 25 publications

(33 citation statements)

References 31 publications

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“…The Mg(OH) 2 dehydration rate can be improved by about 3‐ and 10‐fold using LiOH and a LiOH‐LiCl combination, respectively 16,17 . Similar results were also observed with the addition of LiOOCCH 3 , NaNO 3 , 18 Ce(NO 3 ) 3 , 19 LiNO 3 , 20,21 and Ce(NO 3 ) 3 ‐LiOH 11 . Due to the high thermal conductivity of carbon materials, expanded graphite (EG) composites (EG‐Mg(OH) 2 ), 22 Mg(OH) 2 ‐LiBr‐EG, and Mg(OH) 2 ‐CaCl 2 ‐EG 23 exhibit higher thermal conductivity and heat‐storage performance.…”

Section: Introductionsupporting

confidence: 73%

“…T onset , T peak , and T end for Mg(OH) 2 were measured to be 337. 11,20 this decreased value is currently the largest for Mg(OH) 2 dehydration. Significantly lower dehydration temperatures imply a much easier process for energy storage, which is beneficial to materials for extensive application.…”

Section: Thermodynamics and Kinetics Of Heat Storagementioning

confidence: 94%

“…16,17 Similar results were also observed with the addition of LiOOCCH 3 , NaNO 3 , 18 Ce(NO 3 ) 3 , 19 LiNO 3 , 20,21 and Ce(NO 3 ) 3 -LiOH. 11 Due to the high thermal conductivity of carbon materials, expanded graphite (EG) composites (EG-Mg(OH) 2 ), 22 Mg(OH) 2 -LiBr-EG, and Mg(OH) 2 -CaCl 2 -EG 23 exhibit higher thermal conductivity and heat-storage performance. Moreover, the dehydration temperature of Mg(OH) 2 can be reduced by 76 C using doped LiNO 3 20 and Ce(NO 3 ) 3 -LiOH.…”

Section: Mg Ohmentioning

confidence: 99%

“…Moreover, the dehydration temperature of Mg(OH) 2 can be reduced by 76 C using doped LiNO 3 20 and Ce(NO 3 ) 3 -LiOH. 11 Low dehydration temperatures are beneficial for extensive application. Bentonite and zeolite additives can improve the mechanical strength beneficial for heat-storage and heatrelease cycles in MgO composites.…”

Section: Mg Ohmentioning

confidence: 99%

“…Magnesium hydroxide (Mg(OH) 2 ) and calcium hydroxide (Ca(OH) 2 ) afford the most promising TES materials 10 . In particular, brucite features availability in middle‐temperature (200‐350°C) storage, allowing it to recover industrial‐waste heat and to store solar energy 11 . Moreover, this TES system characterizes nontoxicity, low cost, controllable safety, no waste, and promising reversibility (Equation 1).…”

Section: Introductionmentioning

confidence: 99%

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Thermochemical energy storage drastically enhanced by zirconium oxide and lithium hydroxide for magnesium hydroxide

Ren

Wang

et al. 2021

Energy Storage

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Energy storage provides sustainable energy. Magnesium hydroxide (Mg(OH) 2 ) is a promising material for thermochemical energy storage. Zirconium oxynitrate (ZrO (NO 3 ) 2 ) and lithium hydroxide (LiOH) are investigated to improve the heat-storage efficiency of Mg(OH) 2 . Experimental results indicate that the heat-storage rate can be significantly increased by 306-fold. The dehydration conversion can be increased up to 99% with 122-fold increase in 15.3 min. The onset temperature of Mg(OH) 2 dehydration decreases from 337 to 228 C. The activation energy of Mg(OH) 2 dehydration significantly reduces by 57.7%. The cycle ability of heat storage and heat release also remarkably improves. Moreover, the heat-storage time significantly decreases. The crystal parameters, crystal volume, and platelet size of Mg(OH) 2 notably diminish. The acting mechanism of these additives is proposed using highresolution transmission electron microscopy, X-ray powder diffraction, and X-ray photoelectron spectroscopy data. Moreover, the kinetic equations for the dehydration of excellent Mg(OH) 2 composites are disclosed for computing simulation.

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Section: Introductionsupporting

confidence: 73%

Section: Thermodynamics and Kinetics Of Heat Storagementioning

confidence: 94%

Section: Mg Ohmentioning

confidence: 99%

Section: Mg Ohmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermochemical energy storage drastically enhanced by zirconium oxide and lithium hydroxide for magnesium hydroxide

Ren

Wang

et al. 2021

Energy Storage

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A review on high‐temperature thermochemical heat storage: Particle reactors and materials based on solid–gas reactions

Bellan

Kodama

Gokon

et al. 2022

WIREs Energy & Environment

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In order to produce electricity beyond insolation hours and supply to the electrical grid, thermal energy storage (TES) system plays a major role in CSP (concentrated solar power) plants. Current CSP plants use molten salts as both sensible heat storage media and heat transfer fluid, to operate up to 560 C. To meet the future high operating temperature and efficiency, thermochemical storage (TCS) emerged as an attractive alternatives for next generation CSP plants. In these systems, the solar thermal energy is stored by endothermic reaction and subsequently released when the energy is needed by exothermic reversible reaction. This review compares and summarizes different thermochemical storage systems that are currently being investigated, especially TCS based on metal oxides. Various experimental, numerical, and technological studies on the development of particle reactors and materials for hightemperature TCS applications are presented. Advantages and disadvantages of different types heat storage systems (sensible, latent, and thermochemical), and particle receivers (stacked, fluidized, and entrained), have been discussed and reported.

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Review of the State of the Art and Development Trend of Thermochemical Heat Storage Technology for Medium Temperature Applications

Qiao,

Chaomurilige,

Wang

et al. 2024

Lecture Notes in Electrical Engineering

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Tremendous enhancement of heat storage efficiency for Mg(OH)2-MgO-H2O thermochemical system with addition of Ce(NO3)3 and LiOH

Cited by 25 publications

References 31 publications

Thermochemical energy storage drastically enhanced by zirconium oxide and lithium hydroxide for magnesium hydroxide

Thermochemical energy storage drastically enhanced by zirconium oxide and lithium hydroxide for magnesium hydroxide

A review on high‐temperature thermochemical heat storage: Particle reactors and materials based on solid–gas reactions

Review of the State of the Art and Development Trend of Thermochemical Heat Storage Technology for Medium Temperature Applications

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