摘要
利用气相色谱法测定了常压下30℃、40℃和50℃时甲苯-正庚烷-(环丁砜十三甘醇)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,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,结果令人满意。
Liquid-liquid equilibrium(LLE) data of toluene-n-heptane-Sulfolane and Triethylene gly-col system at 30 ℃ , 40 ℃ and 50 ℃ were determined at atmospheric pressure by gas chromatog-raphy. The quantitative analysis was based on the normalization of peak area per cent, and the results acquired were accurate. NRTL model was used to correlate and predict the LLE data, and parameters of the model were obtained by using simplex method with objective function of mole fraction. Rule of thermodynamic equilibrium was used to deal with the multi-roots problem in the correlating process. The agreement between calculated and experimental data was satisfactory.
出处
《北京石油化工学院学报》
2004年第3期5-8,共4页
Journal of Beijing Institute of Petrochemical Technology
