| Summary: | 博士 === 國立臺灣科技大學 === 化學工程系 === 102 === In this study, we used a high-pressure vibrating tube densimeter to measure the densities of ionic liquid solutions at temperatures from 298.15 K to 348.15 K and pressures from 0.1 to 50 MPa. The mixture solutions included 11 binary systems, which contained 3 solvents : anisole, acetophenone, and 2-propanol, and 5 ionic liquids : [C3mpip][NTf2], [C3mpyr][NTf2], [C4mim][NTf2], [Et2MeS][NTf2], and [Bmpy][NTf2]. The Tait equation correlate well the experimental density data over the entire pressure range.
The excess volumes were calculated from the experimental density data.. In general, the excess volumes are negative except in the ionic liquid-rich region.. The Redlich-Kister and the modified Redlich-Kister model represented well the excess volumes varying with composition at specific temperature and pressure. The FOV (Flory-Orwoll-Vrij) and the Schotte equations of state were also employed to correlate the PVT data. The binary interaction parameter for each binary system was determined by fitting the binary PVT data to the equations of state. The Schotte equation of state is slightly better than the FOV equation of state.
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