Gaseous absorption of 2,3,3,3-tetrafluoroprop-1-ene in three imidazolium-based ionic liquids

The properties of working pairs of refrigerant and absorbent have a great influence on the performance of absorption refrigeration cycle. In this work, the measurements of absorption properties for 2,3,3,3-tetrafluoroprop-1-ene/1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4]), 2,3,3,3-tetrafluoroprop-1-ene/1-hexyl-3-methylimidazolium tetrafluoroborate ([HMIM][BF4]), and 2,3,3,3-tetrafluoroprop-1-ene/1-methyl-3-octylimidazoliumtetrafluoroborate ([OMIM][BF4]) between 283.15 and 343.15 K were performed by means of an isochoric saturation method. Experimental data were correlated using NRTL model and Krichevsky-Kasarnovsky (K-K) equation. The studied results show that absorption of gaseous 2,3,3,3-tetrafluoroprop-1-ene increases with a decrease in temperature and an increase in pressure, and absorption diminished in the following order: [OMIM][BF4] > [HMIM][BF4] > [EMIM][BF4].