摘要
利用气相色谱法测定了常压下温度为30,40,50℃时甲苯-正庚烷-(环丁砜+N-甲基吡咯烷酮)体系的液-液相平衡数据,采用峰面积校正因子归一化法定量分析,所得数据准确、可靠。用NRTL模型对所测数据进行了热力学关联,关联时采用封闭体系的热力学平衡准则———混合吉布斯自由能最小来解决其多值问题。用单纯形优化法,选用摩尔分数的目标函数求出了相应的模型参数。用该模型对本体系进行了预测,预测值与实测值的平均偏差较小。
Liquid-liquid equilibrium(LLE) data of toluene-n-heptane-sulfolane and triethylene glycol system at 30,40, 50 ℃ were determined at the atmospheric pressure by gas chromatography. The quantitative analysis was based on the normalization of peak area per cent, and the accurate results were acquired. The NRTL model was used to correlate and predict the LLE data of system and obtained the model's parameters by using of simplex method with the objective function of mole fraction. The rule of thermodynamic equilibrium was used to deal with the multi-roots problem in the correlating process. The agreement between calculated and experimental data is satisfactory.
出处
《石油化工高等学校学报》
CAS
2004年第2期28-31,42,共5页
Journal of Petrochemical Universities
