Carbon dioxide solubilities in decanoic acid-based hydrophobic deep eutectic solvents

Lawien F. Zubeir, Dannie J.G.P. Van Osch, Marisa A.A. Rocha, Fawzi Banat, Maaike C. Kroon

Research output: Contribution to journalArticleAcademicpeer-review

133 Citations (Scopus)
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The solubility of CO2 in hydrophobic deep eutectic solvents (DESs) has been measured for the first time. Six different hydrophobic DESs are studied in the temperature range from 298 to 323 K and at CO2 pressures up to 2 MPa. The results are evaluated by comparing the solubility data with existing hydrophilic DESs and currently applied physical solvents and fluorinated ionic liquids. The DESs are prepared by mixing decanoic acid with a quaternary ammonium salt with different halide anions and alkyl chain lengths. The measured CO2 solubilities are similar to those found in renowned fluorinated ILs, while the heats of CO2 absorption are in the range of nonpolar solvents. The presented DESs show good potential to be used as CO2 capture agents.

Original languageEnglish
Pages (from-to)913-919
Number of pages7
JournalJournal of Chemical and Engineering Data
Issue number4
Publication statusPublished - 12 Apr 2018


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