A New Alpha-function for the Peng-Robinson Equation of State：Application to Natural Gas

Hamid Saffari; Alireza Zahedi

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A New Alpha-function for the Peng-Robinson Equation of State：Application to Natural Gas

化工热力学 | Updated：2026-01-06

- A New Alpha-function for the Peng-Robinson Equation of State：Application to Natural Gas
- A New Alpha-function for the Peng-Robinson Equation of State：Application to Natural Gas
- 中国化学工程学报（英文版） 2013年21卷第10期页码：1155-11611004-954160581-9
- Affiliations：
  
  LNG research Laboratory, School of Mechanical Engineering, Iran University of Science and Technology, 16846, Tehran,Iran
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- 纸质出版：2013
- Accepted：
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Hamid Saffari, Alireza Zahedi. A New Alpha-function for the Peng-Robinson Equation of State：Application to Natural Gas[J]. 中国化学工程学报（英文版）, 2013,21(10):1155-11611004-954160581-9.

Hamid Saffari, Alireza Zahedi. A New Alpha-function for the Peng-Robinson Equation of State：Application to Natural Gas[J]. Chin.J.Chem.Eng., 2013, 21(10): 1155-1161.
Hamid Saffari, Alireza Zahedi. A New Alpha-function for the Peng-Robinson Equation of State：Application to Natural Gas[J]. 中国化学工程学报（英文版）, 2013,21(10):1155-11611004-954160581-9. DOI：

Hamid Saffari, Alireza Zahedi. A New Alpha-function for the Peng-Robinson Equation of State：Application to Natural Gas[J]. Chin.J.Chem.Eng., 2013, 21(10): 1155-1161. DOI：

摘要

Abstract

Cubic equations of state (EOSs) are simple and easy at calculation. One way of improving the accuracy of a cubic EOS is through the modification of temperature-dependent energy parameter by using alpha-function. The industrial applications of natural gas are very wide and as a result

prediction of thermodynamic properties and phase behavior of natural gas is an important part of design for such processes. In this work we develop a new α-function for the Peng-Robinson (PR) EOS with the parameters optimized especially for natural gas components. The parameters are generalized as a linear function of acentric factor. The results are compared to the predictions from original PR EOS and other α-functions in literature. It is shown that the new α-function presents a good accuracy with the average deviation of 1.42% for natural gas components.

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