Solubility measurement, modeling and mixing thermodynamic properties of R1243zf and R600a in [BMIM][Ac]

ABSTR A C T 3,3,3-Trifluoropropene (R1243zf) and isobutane (R600a) are considered as prominent environmentally-friendly refrigerants, and acetate-based ionic liquids are potential absorbents used in absorption refrigeration cycles. In this work, the dissolving capacities of R1243zf and R600a in one of the acetate-based ionic liquids (1-butyl-3-methylimidazolium acetate, [BMIM][Ac]) were investigated. The measurements were based on isochoric saturation method and the experimental temperature range was from 283.15 K to 343.15 K. The non-random two liquid (NRTL) model and Krichevsky-Kasarnovsky (K-K) model were uti-lized to model the experimental results, and both models exhibited reasonable deviations. On the basis of solubility data and correlation results, the Henry's law constants and the mixing thermodynamic proper -ties (mixing enthalpy, mixing entropy and Gibbs energy) for the two mixtures were determined. In addi-tion, the dissolving abilities of R1243zf and R600a in [BMIM][Ac] were compared with the reported results of R1234yf in the literature. (c) 2021 Elsevier Ltd.

Automated summary

The study investigated the dissolving capacities of R1243zf and R600a in acetate-based ionic liquid using NRTL and K-K models. By analyzing the solubility data and correlations, the properties of the two mixtures were determined, and compared with reported results in the literature.