Prediction of Critical Endpoints Based on the PR Equation of State

杨全; 朱慎林; 李以圭

doi:10.1016/S1004-9541(08)60278-5

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Prediction of Critical Endpoints Based on the PR Equation of State

Updated：2026-01-06

- Prediction of Critical Endpoints Based on the PR Equation of State
- Chinese Journal of Chemical Engineering Vol. 17, Issue 5, Pages: 791-795(2009)
- Affiliations：
  
  1. Key Laboratory of Energy Resources & Chemical Engineering, Ningxia University,Yinchuan,China,750021
  2. Department of Chemical Engineering, Tsinghua University,Beijing,China,100084
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(08)60278-5
  CLC：
- Published：2009
- Accepted：
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YANG Quan, ZHU Shenlin, LI Yigui. Prediction of Critical Endpoints Based on the PR Equation of State[J]. , 2009, 17(5): 791-795.
DOI：

YANG Quan, ZHU Shenlin, LI Yigui. Prediction of Critical Endpoints Based on the PR Equation of State[J]. , 2009, 17(5): 791-795. DOI： 10.1016/S1004-9541(08)60278-5.

摘要

Abstract

In the design of chemical processes

such as catalytic cracking of bitumen and heavy oil

the knowledge of phase behavior at the critical endpoint is essential.Based on the PR equation of state

the algorithm developed by Heidemann and Khalil for calculating critical properties was used to compute critical points.An algorithm for determining the equilibrium phase of the critical point using the tangent plane criterion was developed

and was used to calculate the critical endpoints of different mixtures

including non-polar

polar and associating systems.The critical endpoint

representing the type of the phase behavior

was employed to fit the interaction parameter of mixtures in critical state at high pressure.Lines of critical endpoints for ternary mixtures were also determined with the algorithm.

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