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采用绝热量热法测量了由离子液体1-乙基-3-甲基咪唑磷酸二甲酯[EMIM][DMP]分别与CH_3OH/C_2H_5OH和H_2O所组成的两组三元工质溶液体系[EMIM][DMP](1)+CH_3OH(2)/C_2H_5OH(2)+H_2O(3)在298.15 K,常压下的摩尔混合焓H_m~E。采用Redlich-Kister(RK)方程以及Nagata和Tamura(NT)提出的多项式方程对实验数据进行关联。结果表明,两组三元体系的混合焓在实验浓度范围内均为负值,混合为放热过程,具有成为吸收制冷循环新工质溶液的基本特征。混合焓的关联值与实验值的平均相对误差分别为0.90%和0.88%。
The two ternary working solution systems consisting of ionic liquid 1-ethyl-3-methylimidazolium dimethyl [EMIM] [DMP] and CH_3OH / C_2H_5OH and H_2O were measured by adiabatic calorimetry [EMIM ] [DMP] (1) + CH_3OH (2) / C_2H_5OH (2) + H_2O (3) at 298.15 K, molar enthalpy of mixing H_m ~ E at atmospheric pressure. The experimental data were correlated using the Redlich-Kister (RK) equation and the polynomial equations proposed by Nagata and Tamura (NT). The results show that the enthalpy of mixing of the two ternary systems is negative in the experimental concentration range, and the mixing is an exothermic process, which has the basic characteristics of becoming a new working solution for absorbing refrigeration cycle. The average relative error of the correlation between the enthalpy of mixing and the experimental value were 0.90% and 0.88%, respectively.