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Thermal storage of (solar) energy by sorption of water in magnesium (hydro) carbonates

Yıl 2017, Cilt: 20 Sayı: 2, 102 - 109, 31.05.2017
https://doi.org/10.5541/eoguijt.324161

Öz

In this paper the thermodynamic properties and the chemical reaction kinetics of the reversible reactions where sorption of water in magnesium hydro carbonates are analysed for thermal energy storage (TES). Depending on the conditions mainly nesquehonite, lansfordite and hydromagnesite may be formed from magnesite, all with a certain heat effect. Magnesite and water vapour can form nesquehonite or lansfordite via reaction (R1) and (R2):

MgCO3 + 3H2O(g) ↔ MgCO3∙3H2O ΔH = -1.83 MJ/kg MgCO3, T=298K (R1)
MgCO3 + 5H2O(g) ↔MgCO3∙5H2O ΔH = -2.54 MJ/kg MgCO3, T=298K (R2)

Compared to other chemical sorption compounds, its advantages are low operating temperatures while they can act as a fire retardant. Experimental data is presented on the reactivity of the dehydration at various temperatures. The rate of dehydration of the nesquehonite is sufficient at low temperatures such as 50 °C and the reaction is about 90 % completed after 120 minutes. Magnesite reaches partial re-hydration to about 37% conversion after 24 hours. For better contact between reagents, mixtures with silica gel were used. A too large amount of water vapour, causing condensation of the water, appears to make the reactions irreversible. The temperatures of operating the process are presented as well as which compounds give an optimal energy storage.

Yıl 2017, Cilt: 20 Sayı: 2, 102 - 109, 31.05.2017
https://doi.org/10.5541/eoguijt.324161

Öz

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Ayrıntılar

Bölüm Regular Original Research Article
Yazarlar

Rickard Erlund

Ron Zevenhoven Bu kişi benim

Yayımlanma Tarihi 31 Mayıs 2017
Yayımlandığı Sayı Yıl 2017 Cilt: 20 Sayı: 2

Kaynak Göster

APA Erlund, R., & Zevenhoven, R. (2017). Thermal storage of (solar) energy by sorption of water in magnesium (hydro) carbonates. International Journal of Thermodynamics, 20(2), 102-109. https://doi.org/10.5541/eoguijt.324161
AMA Erlund R, Zevenhoven R. Thermal storage of (solar) energy by sorption of water in magnesium (hydro) carbonates. International Journal of Thermodynamics. Mayıs 2017;20(2):102-109. doi:10.5541/eoguijt.324161
Chicago Erlund, Rickard, ve Ron Zevenhoven. “Thermal Storage of (solar) Energy by Sorption of Water in Magnesium (hydro) Carbonates”. International Journal of Thermodynamics 20, sy. 2 (Mayıs 2017): 102-9. https://doi.org/10.5541/eoguijt.324161.
EndNote Erlund R, Zevenhoven R (01 Mayıs 2017) Thermal storage of (solar) energy by sorption of water in magnesium (hydro) carbonates. International Journal of Thermodynamics 20 2 102–109.
IEEE R. Erlund ve R. Zevenhoven, “Thermal storage of (solar) energy by sorption of water in magnesium (hydro) carbonates”, International Journal of Thermodynamics, c. 20, sy. 2, ss. 102–109, 2017, doi: 10.5541/eoguijt.324161.
ISNAD Erlund, Rickard - Zevenhoven, Ron. “Thermal Storage of (solar) Energy by Sorption of Water in Magnesium (hydro) Carbonates”. International Journal of Thermodynamics 20/2 (Mayıs 2017), 102-109. https://doi.org/10.5541/eoguijt.324161.
JAMA Erlund R, Zevenhoven R. Thermal storage of (solar) energy by sorption of water in magnesium (hydro) carbonates. International Journal of Thermodynamics. 2017;20:102–109.
MLA Erlund, Rickard ve Ron Zevenhoven. “Thermal Storage of (solar) Energy by Sorption of Water in Magnesium (hydro) Carbonates”. International Journal of Thermodynamics, c. 20, sy. 2, 2017, ss. 102-9, doi:10.5541/eoguijt.324161.
Vancouver Erlund R, Zevenhoven R. Thermal storage of (solar) energy by sorption of water in magnesium (hydro) carbonates. International Journal of Thermodynamics. 2017;20(2):102-9.