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Issue 51, 2015
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Long-term thermal stabilities of ammonium ionic liquids designed as potential absorbents of ammonia

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Abstract

Searching for potential absorbents in working pairs with NH3, a series of new ammonium ionic liquids related to choline were designed and synthesized. In order to explore their applicability in refrigeration by absorption, their thermal stabilities were studied. For this proposal, a thermogravimetric analyzer, TGA 7 – Perkin-Elmer, was used in dynamic mode from 100 °C to 800 °C at 10 °C min−1 under dry air atmosphere. From the ionic liquids TG curves, the onset temperatures (Tonset) were determined, as well as the loss of mass at these Tonset. Significant decomposition was detected at lower temperatures than Tonset in all cases, meaning that the true ionic liquids stability is lower than that provided by the dynamic TG. Isothermal studies at lower temperatures than Tonset were also carried out to estimate the long-term thermal stabilities at different temperatures.

Graphical abstract: Long-term thermal stabilities of ammonium ionic liquids designed as potential absorbents of ammonia

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Publication details

The article was received on 19 Feb 2015, accepted on 29 Apr 2015 and first published on 06 May 2015


Article type: Paper
DOI: 10.1039/C5RA03192C
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Citation: RSC Adv., 2015,5, 41278-41284
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    Long-term thermal stabilities of ammonium ionic liquids designed as potential absorbents of ammonia

    M. Lorenzo, M. Vilas, P. Verdía, M. Villanueva, J. Salgado and E. Tojo, RSC Adv., 2015, 5, 41278
    DOI: 10.1039/C5RA03192C

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