Gaseous Absorption of trans-1-Chloro-3,3,3-trifluoropropene in Three Immidazolium-Based Ionic Liquids

In this work, the solubilities and diffusion coefficients of refrigerant trans-1-chloro-3,3,3-trifluoropropene (R1233zd(E)) in three imidazolium ionic liquids were measured at temperatures from 303.1 to 343.2 K and pressures up to 0.14 MPa. The ionic liquids include 1-hexyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)amide ([HMIM][Tf₂N]), 1-hexyl-3-methylimidazolium trifluoromethanesulfonate ([HMIM][TfO]), and 1-hexyl-3-methyl-imidazolium tetrafluoroborate([HMIM][BF₄]). The non-random two-liquid (NRTL) activity coefficient model was employed to correlate the experimental solubility data successfully, the AAD between the measured data and calculated values for the solubilities of R1233zd(E) in [HMIM][Tf₂N], [HMIM][TfO], and [HMIM][BF₄] are 3.1, 2.5, and 4.0%, respectively. The Wilke-Chang equation was used to correlate diffusion coefficients, the relative deviations between experimental results and the values calculated are most within 10%. Meanwhile, the solubility and diffusivity of refrigerant gases R32, R125, R152a, R161, R143a, R1234yf, R1234ze(E), and R1233zd(E) in ionic liquids [HMIM][Tf₂N], [HMIM][TfO], and [HMIM][BF₄] were compared and analyzed.