Newly developed hybrid materials made of magnesium hydroxide and carbon nanotubes were proposedas heat storage medium for MgO/H2O/Mg(OH)2 chemical heat pumps. Samples were synthesized bydeposition-precipitation method varying the Mg(OH)2 load (32–52 wt.%) and the type of carbon nanotubes,pristine or functionalized. The performances of the synthesized materials were evaluated by thermogravimetricanalysis, which simulates the chemical heat pump cycle. The presence of thecarbonaceous material positively affected the reaction performances, so that the hybrid materials showedimproved heat storage/output capacity and faster heat output rate compared to pure Mg(OH)2. The functionalizationtreatment and a proper Mg(OH)2 load were fundamental to better the dispersibility of Mg(OH)2 into the carbon nanotubes bundles which in turn enhanced the thermochemical performance ofthe active material, fully exploiting for the first time its maximum potential heat storage capacity, thatis 1300 kJ/kgMg(OH)2, thus bringing the development of this technology to a level closer to its industrialapplication.
|Titolo:||Thermochemical performance of carbon nanotubes based hybrid materials for MgO/H2O/Mg(OH)2 chemical heat pumps|
|Data di pubblicazione:||2016|
|Appare nelle tipologie:||1.1 Articolo in rivista|