噻吩-吡啶-二甲基亚砜体系等压汽液平衡

摘要

Isobaric vapor-liquid equilibrium (VLE) data of thiophene-pyridine-dimethyl sulfoxide ternary system and three constituent binary systems with different liquid phase composition were measured by using a pump-ebullionmeter. The three binary systems were correlated with the Wilson, NRTL, Margules and van Laar models, respectively. The VLE data correlation results of the three binary systems show that the NRTL model is much better than the other models, and its average absolute values of temperature deviation of above three binary systems are 0.13 K, 0.27 K and 0.39 K, respectively. The VLE data of the ternary system were evaluated by respectively using the different parameters obtained from above three binary systems with the four different models, and then from the evaluation of the VLE data, the vapor-phase compositions y and the calculated bubble point were obtained. The thermodynamic consistency of the VLE data were checked by means of the Herington test for the binary systems and the McDermott-Ellis test for the ternary system, respectively, and the results show that the VLE data of these systems strictly satisfy the thermodynamic consistency.%　　在101.325 kPa下用泵式沸点仪测定了噻吩-吡啶-二甲基亚砜三元体系及其3个二元体系不同液相组成时的汽液平衡数据.3个二元体系分别用Wilson、NRTL、Margules和van Laar模型进行关联.NRTL模型关联的结果较好,3个二元体系温度平均偏差分别为0.13 K,0.27 K和0.39 K.用3个二元体系的4种不同模型参数分别对所测的三元体系数据进行估算,得到了汽相组成y和泡点温度.分别由Herington法和McDermott–Ellis法对3个二元体系和三元体系进行了热力学一致性检验,结果表明这些相平衡数据满足热力学一致性.