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

Autor:	Gian Domenico Sorarù, Mattia Biesuz, A. Zambotti, Francesco Valentini, Emanuele Lodi, Soňa Kohúteková, Matouš Kloda, Alessandro Pegoretti, Vaclav Tyrpekl
Rok vydání:	2022
Předmět:	Materials science Magnesium Mechanical Engineering Composite number Metals and Alloys chemistry.chemical_element Aerogel Thermal energy storage Chemical engineering chemistry Mechanics of Materials visual_art Materials Chemistry visual_art.visual_art_medium Ceramic Porosity Hydrate Mass fraction
Zdroj:	Journal of Alloys and Compounds. 895:162592
ISSN:	0925-8388
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6053c4653ee9529f6d8bf109368b4072 https://doi.org/10.1016/j.jallcom.2021.162592 Zobrazit plný text záznamu Full Text from ScienceDirect