Solubility of H2S in ammonium-based ionic liquids


This work is inserted in a research program that consists mainly in the experimental and theoretical study of gas/liquid solubility in ionic liquids (ILs). In this study the experimental data of hydrogen sulfide solubility in ammonium-based ionic liquids, namely 2-hydroxyethylammonium acetate [2-HEA][Ace], bis(2-hydroxyethyl)ammonium acetate [B-2-HEA] [Ace] and 2-hydroxyethyldiethylammonium hydrogen diacetate [2-HEDEA][H(Ace)(2)], were determined using a volumetric method in the 298 K to 318 K temperature range and at atmospheric pressure. The ionic liquids are functionalized with the OH group in the ammonium-based cations, in order to study the influence of hydroxyl group in the formation of hydrogen bonds between the IL-IL and IL-gas. The data gathered is modelled with the Cubic Plus Association Equation of State (CPA EoS), considering the association schemes four-sites (4C) for hydrogen sulfide and two-sites (2B) for the ILs ([2-HEA] [Ace], [B-2-HEA][Ace] and [2-HEDEA][H(Ace)(2)]). (C) 2020 Elsevier Ltd.



subject category

Thermodynamics; Chemistry, Physical


Sousa, JMMV; Sintra, TE; Ferreira, AGM; Carvalho, PJ; Fonseca, IMA

our authors


This work was developed in the scope of the project CICECO-Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (Ref. FCT UID/CTM/50011/2013) funded by FEDER through COMPETE2020 - Programa Operacional Competitividade e Internacionalizacao (POCI) and by national funds through FCT Fundacao para a Ciencia e a Tecnologia. P.J.C. acknowledges FCT for the contract under the Investigator FCT 2015 (IF/00758/2015).

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