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Gas solubilities in room temperature ionic liquids - Correlation between RTiL-molar mass and Henry's law constant

: Blath, J.; Christ, M.; Deubler, N.; Hirth, T.; Schiestel, T.


The chemical engineering journal 172 (2011), Nr.1, S.167-176
ISSN: 1385-8947
ISSN: 0300-9467
ISSN: 0923-0467
ISSN: 0009-2487
Fraunhofer IGB ()

The solubility of CO2, CH4, N2, and CO was measured in a broad number of ionic liquids using a pressure drop set-up. A successful correlation of the Henry's law constants at 60°C was made to two empirical models already described in literature (Camper et al. [13] and Moganty and Baltus [25]). Subsequently, a new empirical model was proposed, which describes the Henry's law constant as a function of the molar mass of the ionic liquid, as long as physical interactions between gas and ionic liquid are dominant. Additionally, the entropy and enthalpy of solvation was studied by means of the temperature influence to the Henry's law constant.