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在0-1．45 MPa压力范围内,测定了293．15 K、323．15 K、353．15 K、373．15 K温度下二甲醚-甲醇二元体系的汽液相平衡数据。利用气相色谱检测汽液相组成,对测定数据进行了热力学计算,采用PR方程计算气相各组分的逸度系数,利用 NRTL和UNIFAC法计算液相活度系数。两种不同模型计算值与实验值符合良好,汽液相平衡数据经Herington面积法校验满足热力学一致性检验。
In the pressure range of 0-1.45 MPa, the vapor-liquid equilibrium data of dimethyl ether-methanol binary system at 293.15 K, 323.15 K, 353.15 K and 373.15 K were measured. The gas-liquid phase composition was determined by gas chromatography. The thermodynamic calculation was performed on the determination data. The fugacity coefficient of each component was calculated by PR equation. The liquidus activity coefficient was calculated by NRTL and UNIFAC. The calculated values of the two different models are in good agreement with the experimental values. The vapor-liquid equilibrium data is verified by the Herington area method to meet the thermodynamic consistency test.