Thermal Stability of Ionic Liquids: Effect of Metals
Francesca Nardelli; Emilia Bramanti; Alessandro Lavacchi; Silvia Pizzanelli; Beatrice Campanella; Claudia Forte; Enrico Berretti; Angelo Freni
We investigated the thermal stability and corrosion effects of a promising ionic liquid (IL) to be employed as an advanced heat transfer fluid in solar thermal energy applications. Degradation tests were performed on IL samples kept in contact with various metals (steel, copper and brass) at 200 °:C for different time lengths. Structural characterization of fresh and aged IL samples was carried out by high-resolution magic angle spinning nuclear magnetic resonance and Fourier transform infrared spectroscopic analyses, while headspace gas chromatography&ndash:mass spectrometry was employed to evaluate the release of volatile organic compounds. The combination of the above-mentioned techniques effectively allowed the occurrence of degradation processes due to aging to be verified.
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