A magnesium sulfate-alumina composite has been synthesized as an active material for thermochemical heat storage. The homemade pellets were synthesized from E330 and E600 alumina powders and presented a macroporous structure, while the industrial pellets were microporous. Both types of pellets were impregnated with magnesium sulfate heptahydrate followed by characterization and posterior comparison of their performance in a tubular reactor. The gamma-Al2O3 pellets had the highest value of theoretical energy density (206 kWh/m3) followed by the E330 (188 kWh/m3). However, the E330 reached a higher performance than the gamma-alumina ones, which was linked to their macroporous structure, corroborating the positive influence that the macroporosity has on the performance.
Un composito di solfato di magnesio e allumina è stato sintetizzato come materiale attivo per l'accumulo di calore termochimico. I pellet fatti inlaboratorio sono stati sintetizzati da polveri di allumina E330 ed E600 e presentavano una struttura macroporosa, mentre i pellet industriali erano microporosi. Entrambi i tipi di pellet sono stati impregnati con solfato di magnesio eptaidrato seguito da caratterizzazione e confronto a posteriori delle loro prestazioni in un reattore tubolare. I pellet gamma-Al2O3 avevano il valore più alto di densità di energia teorica (206 kWh/m3) seguiti dall'E330 (188 kWh/m3). Tuttavia, l'E330 ha raggiunto prestazioni superiori rispetto a quelle gamma-allumina, che era legata alla loro struttura macroporosa, a conferma dell'influenza positiva che la macroporosità ha sulle prestazioni.
Manufacture and characterization of alumina-based supports for thermochemical energy storage applications
JIMENEZ VALDES, VANESSA
2021/2022
Abstract
A magnesium sulfate-alumina composite has been synthesized as an active material for thermochemical heat storage. The homemade pellets were synthesized from E330 and E600 alumina powders and presented a macroporous structure, while the industrial pellets were microporous. Both types of pellets were impregnated with magnesium sulfate heptahydrate followed by characterization and posterior comparison of their performance in a tubular reactor. The gamma-Al2O3 pellets had the highest value of theoretical energy density (206 kWh/m3) followed by the E330 (188 kWh/m3). However, the E330 reached a higher performance than the gamma-alumina ones, which was linked to their macroporous structure, corroborating the positive influence that the macroporosity has on the performance.File | Dimensione | Formato | |
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https://hdl.handle.net/10589/186192