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Comparison of different alpha functions, α(T), applied in the prediction of supercritical properties of different polar and nonpolar fluids at Boyle temperature
Fluid Phase Equilibria ( IF 2.8 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.fluid.2020.112517
Alireza Hosseini , Ali Khoshsima , Ali Haghtalab

Abstract The Boyle temperature is the temperature at which the second virial coefficient becomes zero. In this work, capability of different alpha functions, α(Tr), in prediction of supercritical properties of different polar and nonpolar fluids at Boyle temperature is investigated. In this direction, eight different alpha functions, α(Tr), including Peng – Robinson original form (1976), Coquelet et al. (2004), Haghtalab et al. (2011), Saffari – Zahedi (2013), Soave – Redlich – Kwong original form (1972), Ozokwelu – Erbar (1987), Soave (1993) and Nasrifar – Bolland (2004) are coupled with different cubic equations of states including Peng – Robinson (PR), Soave – Redlich – Kwong (SRK), volume – translated Peng – Robinson (VTPR), volume translated Soave Redlich-Kwong (VTSRK) and Patel ‒ Teja ‒ Valderrama (PTV). The obtained results have been compared with the most popular relations, such as Tsonopoulos and Meng – Duan correlations. To understand better, the second virial coefficient and Zeno line have been also depicted and compared with the available experimental data. In addition, the residual properties (HR, SR, UR, and GR) and the second order thermodynamic derivatives (Cp, Cv, us, μJT) at the Boyle condition have been also investigated. Furthermore, the trend of the inversion temperature (Tinv) versus the Boyle temperature is studied for n-alkanes, n-alkenes, amines and noble gases.

中文翻译:

不同 alpha 函数 α(T) 的比较,用于预测波义耳温度下不同极性和非极性流体的超临界特性

摘要 波义耳温度是第二维里系数为零时的温度。在这项工作中,研究了不同 alpha 函数 α(Tr) 在波义耳温度下预测不同极性和非极性流体的超临界特性的能力。在这个方向上,八个不同的 alpha 函数,α(Tr),包括 Peng-Robinson 原始形式 (1976),Coquelet 等人。(2004),Haghtalab 等。(2011)、Saffari-Zahedi(2013)、Soave-Redlich-Kwong原形(1972)、Ozokwelu-Erbar(1987)、Soave(1993)和Nasrifar-Bolland(2004)与不同的三次状态方程耦合,包括Peng – Robinson (PR)、Soave – Redlich – Kwong (SRK)、volume – 翻译 Peng – Robinson (VTPR)、volume 翻译 Soave Redlich-Kwong (VTSRK) 和 Patel – Teja – Valderrama (PTV)。获得的结果已与最流行的关系进行了比较,例如 Tsonopoulos 和 Meng-Duan 相关性。为了更好地理解,还描述了第二维里系数和芝诺线,并与可用的实验数据进行了比较。此外,还研究了波义耳条件下的残余性质(HR、SR、UR 和 GR)和二阶热力学导数(Cp、Cv、us、μJT)。此外,研究了正烷烃、正烯烃、胺和惰性气体的转化温度 (Tinv) 与波义耳温度的趋势。UR 和 GR) 和波义耳条件下的二阶热力学导数 (Cp, Cv, us, μJT) 也已被研究。此外,研究了正烷烃、正烯烃、胺和惰性气体的转化温度 (Tinv) 与波义耳温度的趋势。UR 和 GR) 和波义耳条件下的二阶热力学导数 (Cp, Cv, us, μJT) 也已被研究。此外,研究了正烷烃、正烯烃、胺和惰性气体的转化温度 (Tinv) 与波义耳温度的趋势。
更新日期:2020-05-01
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