Thermochemical Energy Storage using LiNO<sub>3</sub>‐Doped Mg(OH)<sub>2</sub>: A Dehydration Study

Shkatulov, Alexandr; Aristov, Yu. I.

doi:10.1002/ente.201800050

Cited by 33 publications

(24 citation statements)

References 43 publications

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“…Yan et al 16 . reported that the dehydration rate increases with the doping of Li and that the decomposition temperature and time of Ca(OH) 2 decrease simultaneously; these effects were confirmed by Shkatulov et al 17 . Xia et al 18 .…”

Section: Introductionmentioning

confidence: 75%

Coupled CO₂ capture and thermochemical heat storage of CaO derived from calcium acetate

Sun

Yan

et al. 2020

Greenhouse Gases

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CaO/Ca(OH) 2 thermochemical heat storage (THS) technology is considered to be one of the most promising technologies for large-scale solar energy storage. However, the THS performance of raw CaO-based materials decreases during multiple cycles. In this work, CaO derived from calcium acetate (Ac-CaO) is prepared and applied to a coupled system that achieved simultaneous CaO/Ca(OH) 2 THS and CO 2 capture. The CO 2 capture and THS performances of Ac-CaO are always higher than those of calcined limestone owing to the preferable pore structure, whereas Ac-CaO exhibits decreasing CO 2 capture and THS performance resulting from sintering and the formation of CaCO 3 from CaO or Ca(OH) 2 with ambient CO 2 during air cooling, respectively. In the coupled CaO/Ca(OH) 2 THS and CO 2 capture system, Ac-CaO is subjected to 10 CO 2 capture cycles, 30 THS cycles, 1 CO 2 capture cycle, 10 THS cycles, 1 CO 2 capture cycle, and 10 THS cycles sequentially. The hydration and dehydration conversions of Ac-CaO in the 31st THS cycle reach 91.7 and 93.6%, respectively, which are 1.6 and 1.6 times higher than those recorded prior to the 11th CO 2 capture cycle owing to the decomposition of CaCO 3 during calcination. The carbonation conversion of Ac-CaO achieves 89.9% in the 11th CO 2 capture cycle, which is 22.3% higher than that recorded prior to the 10 THS cycles owing to reactivation from the hydration process during THS. The CO 2 capture and CaO/Ca(OH) 2 THS processes are enhanced in the coupled system using Ac-CaO; therefore, the coupled system appears promising for CaO/Ca(OH) 2 THS and CO 2 capture.

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Section: Introductionmentioning

confidence: 75%

Coupled CO₂ capture and thermochemical heat storage of CaO derived from calcium acetate

Sun

Yan

et al. 2020

Greenhouse Gases

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“…A,Schematic illustration of the principle of chemical energy storage and, B, different groups of materials used for chemical energy storage …”

Section: Artificial Energy Storage: Thermal Conversion Methodsmentioning

confidence: 99%

Principles of solar energy storage

2019

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Energy storage is one of the most important energetic strategies of the mankind, along with other energy challenges, such as development of energy resources, energy conversion, and energy saving. The problem of energy storage is especially actual in respect to renewable sources of energy, such as sun, wind, tides, which have seasonal or diurnal variations and which therefore are not available at any moment of time. This article overviews the main principles of storage of solar energy for its subsequent long-term consumption. The methods are separated into two groups: the thermal and photonic methods of energy conversion. The comparison of efficiency of energy production and storage through natural and artificial photosynthesis, sensible and latent heat, chemisorptions and physisorption, chemical and electrochemical reactions is given.energy storage, photosynthesis, sensible heat, latent heat, chemical energy, rechargeable batteries

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“…and W comp. , are estimated from the measured reacted mole fraction by Equations (4) and (5). At 300 • C, the (LiK)NO 3 /MgO composite with α= 0.20 exhibits larger specific useful heat Q comp.…”

Section: Evaluation Of the Specific Useful Heatmentioning

confidence: 99%

“…Aside from large-scale industrial processes such as ammonia production [4] there are only a few solid-gas reactions that were extensively studied specifically for TCES at medium temperatures. They are dehydration of Mg(OH) 2 [5], Ca(OH) 2 [6], dehydrogenation of MgH 2 and some other hydrides [7].…”

Section: Introductionmentioning

confidence: 99%

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Adapting the MgO-CO2 Working Pair for Thermochemical Energy Storage by Doping with Salts: Effect of the (LiK)NO3 Content

et al. 2019

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The MgO-CO2 working pair has been regarded as prospective for thermochemical energy storage (TCES) due to its relatively high heat storage capacity, low cost, and wide availability. This study is aimed at the optimization of the molar salt content, α, for the MgO modified with the eutectic mixture of LiNO3 and KNO3 (Li0.42K0.58NO3) which was earlier shown to provide high conversion, Δx, in heat-storage/release processes at 300–400 °C. The composites that have different salt content were prepared and carbonation kinetics was investigated under various conditions (carbonation temperature, Tcarb., is 290–360 °C and CO2 pressure, P(CO2), is 50–101 kPa). Significant accelerating effect was revealed at α ≥ 0.05, and the Δx value was maximized at α = 0.10–0.20. The largest conversion of 0.70 was detected at α = 0.10 and Tcarb. = 350 °C that corresponds to the specific useful heat (Qcomp.) is 1.63 MJ/kg-composite. However, the salt content of 0.20 ensures the high conversion, Δx = 0.63–0.67 and Qcomp. = 1.18–1.25 MJ/kg-composite in the whole temperature range between 290 and 350 °C. The (LiK)NO3/MgO composite with an optimal salt content of 0.20 exhibits reasonable durability through cyclic experiment at 330 °C, namely, the stabilized reacted conversion Δx = 0.34 (Qcomp. = 0.64 MJ/kg-composite). The studied (Li0.42K0.58)NO3 promoted MgO-CO2 working pair has good potential as thermochemical storage material of middle temperature heat (300–400 °C).

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Thermochemical Energy Storage using LiNO₃‐Doped Mg(OH)₂: A Dehydration Study

Cited by 33 publications

References 43 publications

Coupled CO₂ capture and thermochemical heat storage of CaO derived from calcium acetate

Coupled CO₂ capture and thermochemical heat storage of CaO derived from calcium acetate

Principles of solar energy storage

Adapting the MgO-CO2 Working Pair for Thermochemical Energy Storage by Doping with Salts: Effect of the (LiK)NO3 Content

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Thermochemical Energy Storage using LiNO3‐Doped Mg(OH)2: A Dehydration Study

Cited by 33 publications

References 43 publications

Coupled CO2 capture and thermochemical heat storage of CaO derived from calcium acetate

Coupled CO2 capture and thermochemical heat storage of CaO derived from calcium acetate

Principles of solar energy storage

Adapting the MgO-CO2 Working Pair for Thermochemical Energy Storage by Doping with Salts: Effect of the (LiK)NO3 Content

Contact Info

Product

Resources

About

Thermochemical Energy Storage using LiNO₃‐Doped Mg(OH)₂: A Dehydration Study

Coupled CO₂ capture and thermochemical heat storage of CaO derived from calcium acetate

Coupled CO₂ capture and thermochemical heat storage of CaO derived from calcium acetate