Derivative Properties from High-Precision Equations of State

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• 作者：Reza Haghbakhsh ; Morten Konttorp ; Sona Raeissi ; Cor J. Peters ; John P. O鈥機onnell
• 刊名：Journal of Physical Chemistry B
• 出版年：2014
• 出版时间：December 11, 2014
• 年：2014
• 卷：118
• 期：49
• 页码：14397-14409
• 全文大小：918K
• ISSN：1520-5207

文摘

In this study, the behavior of derivative properties estimated by equations of state, including isochoric heat capacity, isobaric heat capacity, speed of sound, and the Joule鈥揟homson coefficient for pure compounds and a mixture, has been investigated. The Schmidt鈥揥agner and Jacobsen鈥揝tewart equations of state were used for predictions of derivative properties of 10 different pure compounds from various nonpolar hydrocarbons, nonpolar cyclic hydrocarbons, polar compounds, and refrigerants. The estimations were compared to experimental data. To evaluate the behavior of mixtures, the extended corresponding states principle (ECS) was studied. Analytical relationships were derived for isochoric heat capacity, isobaric heat capacity, the Joule鈥揟homson coefficient, and the speed of sound. The ECS calculations were compared to the reference surface data of methane + ethane. The ECS principle was found to generate data of high quality.