The thermochemical heat storage performances of hygroscopic magnesium sulphate (MgSO4) can be improved by dispersing it within a porous matrix. However, the host material must be able to bear the intense stresses developed by the hydration of the salt. In this work, we report the first use of a polymer-derived SiOC ceramic aerogel as host for the confinement of MgSO4 for seasonal thermal energy storage, providing a way to easily tune its final porosity to achieve controllable mass fractions of salt in the so-obtained composite. Besides, the distinctive mesoporosity of ceramic aerogels guarantee a free path for water vapour to rapidly hydrate MgSO4 while avoiding the breakage of the composite. Vacuum impregnation of the aerogel samples led to a composite with a maximum of 59.1%wt of MgSO4.1 H2O and a complete hydration in 60 min under H2O saturated air. © 2021 Elsevier B.V. All rights reserved.

Thermochemical heat storage performances of magnesium sulphate confined in polymer-derived SiOC aerogels / Zambotti, Andrea; Valentini, Francesco; Lodi, Emanuele; Pegoretti, Alessandro; Tyrpekl, Václav; Kohúteková, Sona; Soraru, Gian Domenico; Kloda, Matouš; Biesuz, Mattia. - In: JOURNAL OF ALLOYS AND COMPOUNDS. - ISSN 0925-8388. - 895:(2022), pp. 162592.1-162592.7. [10.1016/j.jallcom.2021.162592]

Thermochemical heat storage performances of magnesium sulphate confined in polymer-derived SiOC aerogels

Zambotti, Andrea;Valentini, Francesco;Pegoretti, Alessandro;Soraru, Gian Domenico;Biesuz, Mattia
2022-01-01

Abstract

The thermochemical heat storage performances of hygroscopic magnesium sulphate (MgSO4) can be improved by dispersing it within a porous matrix. However, the host material must be able to bear the intense stresses developed by the hydration of the salt. In this work, we report the first use of a polymer-derived SiOC ceramic aerogel as host for the confinement of MgSO4 for seasonal thermal energy storage, providing a way to easily tune its final porosity to achieve controllable mass fractions of salt in the so-obtained composite. Besides, the distinctive mesoporosity of ceramic aerogels guarantee a free path for water vapour to rapidly hydrate MgSO4 while avoiding the breakage of the composite. Vacuum impregnation of the aerogel samples led to a composite with a maximum of 59.1%wt of MgSO4.1 H2O and a complete hydration in 60 min under H2O saturated air. © 2021 Elsevier B.V. All rights reserved.
2022
Zambotti, Andrea; Valentini, Francesco; Lodi, Emanuele; Pegoretti, Alessandro; Tyrpekl, Václav; Kohúteková, Sona; Soraru, Gian Domenico; Kloda, Matouš...espandi
Thermochemical heat storage performances of magnesium sulphate confined in polymer-derived SiOC aerogels / Zambotti, Andrea; Valentini, Francesco; Lodi, Emanuele; Pegoretti, Alessandro; Tyrpekl, Václav; Kohúteková, Sona; Soraru, Gian Domenico; Kloda, Matouš; Biesuz, Mattia. - In: JOURNAL OF ALLOYS AND COMPOUNDS. - ISSN 0925-8388. - 895:(2022), pp. 162592.1-162592.7. [10.1016/j.jallcom.2021.162592]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/323045
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