Enthalpy and Phase Behavior of a Non-Ideal Ternary System atElevated Temperatures and Pressures

非理想三元系统在高温和高压下的焓和相行为

• 批准号: 8813020
• 负责人: Victor Yesavage
• 金额: $ 12.84万
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-10-01 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8813020&HistoricalAwards=false
• 关键词: Enthalpy; Phase; Behavior; Non; Ideal

In this project it is proposed to study the enthalpy and phase behavior of a model system, methanol (which is hydrogen bonding) /n-pentane (non-polar)/acetone (polar), that is representative of interactions present in mixtures containing a non-polar, a polar and a hydrogen bonding compound. Studies will be conducted at elevated temperatures (375 to 700 degrees K) and pressures (0.1 to 10MPa) including the critical and supercritical regions. Primary measurements will be made in a Freon 11 reference fluid boil-off calorimeter, and an equilibrium flash vaporization apparatus, which have already been developed. Additional measurements will be made in the critical region using a new automated flow calorimeter. This system is studied in part because some phase behavior data are available for this system at lower temperatures. Enthalpy and phase behavior measurements will also be made for the three pure compounds, the three binary mixtures, and selected compositions of the ternary. This set of data will be used as a standard for correlation of equations of state applicable for both phase behavior and enthalpy predictions of such highly non-ideal mixtures. Experimental results at subcritical conditions have recently been obtained for a different ternary system--tetralin/quinoline/m- cresol. Comparison of these results with correlations has shown that present equation of state methods cannot be used to predict both phase behavior and enthalpy of binary and ternary systems, containing polar associating compounds. Therefore, equation of state development will continue, emphasizing perturbed hard body equations, with the objective of developing equation of state methods that are applicable to non-ideal ternary mixtures that can serve as models of the complex systems often encountered in industrial practice.

在这个项目中，建议研究一个模型系统的焓和相行为，甲醇（氢键）/正戊烷（非极性）/丙酮（极性），这是代表存在于含有非极性、极性和氢键化合物的混合物中的相互作用。研究将在高温（375至700度K）和压力（0.1至10MPa）下进行，包括临界和超临界区域。初步测量将在氟利昂11参考流体蒸发量热计和平衡闪蒸装置中进行，这些装置已经开发出来。将使用新的自动流量量热计在关键区域进行额外的测量。研究该系统的部分原因是在较低温度下该系统的一些相行为数据是可用的。焓和相行为的测量也将对三种纯化合物，三种二元混合物，和选择的组成的三元。这组数据将被用作相关状态方程的标准，适用于这种高度非理想混合物的相行为和焓预测。最近在亚临界条件下获得了不同三元体系——四萘林/喹啉/间甲酚的实验结果。这些结果与相关关系的比较表明，目前的状态方程方法不能用于预测二元和三元体系的相行为和焓，包含极性缔合化合物。因此，状态方程的发展将继续，强调摄动硬体方程，目的是发展适用于非理想三元混合物的状态方程方法，可以作为工业实践中经常遇到的复杂系统的模型。