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论文类型：期刊论文

发表时间：2014-02-01

发表刊物：JOURNAL OF CHEMICAL AND ENGINEERING DATA

收录刊物：SCIE、EI、Scopus

卷号：59

期号：2

页面范围：205-211

ISSN号：0021-9568

摘要：The excess enthalpies of binary and ternary solutions composed of ionic liquid, 1-ethyl-3-methylimidazolium dimethylphosphate [Emim][DMP], water, and methanol (or ethanol) were measured with an adiabatic calorimeter at 298.15 K and under normal atmospheric pressure. The experimental data for three sets of binary solution [Emim] [DMP] (1) + H2O(2)/CH3OH(2)/C2H5OH(2) were correlated with the Gibbs-Helmholtz, the nonrandom two liquid (NRTL), and the universal quasi-chemical (UNIQUAC) equations. The binary interaction parameters in the NRTL and UNIQUAC models were obtained and used to predict excess enthalpies of ternary solutions [Emim] [DMP](1) + CH3OH(2) or C2H5OH(2) + H2O(3). The results show that the excess enthalpies of ternary solutions are negative across the whole range of concentrations, which indicates that the [Emim] [DMP] mixed with H2O, CH3OH, or C2H5OH is exothermic. Meanwhile, the average relative deviations (ARD) between the experimental and correlated excess enthalpies for the three sets of binary solutions are 2.49 %, 1.64%, 2.44 % (NRTL) or 2.98 %, 3.00 %, and 3.43 % (UNIQUAC). The ARD between the experimental and predicted excess enthalpies for two set of ternary solution are 7.89 %, 5.17 % (NRTL) and 1.86 %, and 1.86 % (UNIQUAC), respectively.