Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The isothermal vapor liquid equilibrium (VLE) data of fluoroethane (R161) + N,N-dimethylacetamide (DMAC), R161 + N-methyl-2-pyrrolidone (NMP), and 1,1,1,2-tetrafluoroethane (R134a) + DMAC were measured in a temperature range from (293.15 to 353.15) K, and the five-parameter nonrandom two-liquid (NRTL) model was selected to correlate the obtained VLE data. According to the order of R161 + DMAC, R161 + NMP, and R134a + DMAC, the mean relative deviations of the pressure between the experimental and calculated values are 1.16 %, 1.39 %, and 1.13 %, and the maximum deviations of that are 3.30 %, 3.59 %, and 3.14 %. The experimental results show that all of the binary systems have very good affinity, and especially the affinity of the system R161 + DMAC is the best. Additionally, the three binary systems exhibit negative deviations from Raoult s law, and the order of the negative deviation degree from strong to weak is arranged as R161 + DMAC greater than R161 + NMP greater than R134a + DMAC.