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Local Composition Model for the Phase Equilibrium, Phase Densities and Surface Tensions of Hydrocarbon-Hydrocarbon and Hydrocarbon-CO2 Mixtures
ZHU Junyue,DUAN Yuanyuan *,YANG Zhen
Key Laboratory of Thermal Science and Power Engineering of Ministry of Education, Beijing Key Laboratory of CO2 Utilization and Reduction Technology, Tsinghua University, Beijing 100084, China
*Correspondence author
#Submitted by
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Funding: the National Natural Science Foundation of China (No.51076074, 51321002), the Specialized Research Fund for the Doctoral Program of Higher Education(No.20100002110045)
Opened online:28 October 2013
Accepted by: none
Citation: ZHU Junyue,DUAN Yuanyuan,YANG Zhen.Local Composition Model for the Phase Equilibrium, Phase Densities and Surface Tensions of Hydrocarbon-Hydrocarbon and Hydrocarbon-CO2 Mixtures[OL]. [28 October 2013] http://en.paper.edu.cn/en_releasepaper/content/4565233
 
 
Phase equilibrium, phase densities and surface tensions of hydrcaorbon-hydrocarbon (HC-HC) and hydrocarbon-CO2 (HC-CO2) vapor-liquid system have great importance in separation, purification and dissolution processes. In this work, a local composition model was introduced into the volume translated Peng-Robinson(VTPR) equation of state(EOS) to calculate the phase equilibrium and phase densities. And then the local composition combined with VTPR EOS was used to predict the surface tensions based on the gradient theory. The results show that the introduction of the local composition model can achieve accurate calculation of phase equilibrium, phase densities and surface tensions for binary HC-HC and HC-CO2 mixtures.
Keywords:phase equilibrium; phase densities; surface tension; local composition; hydrocarbon; carbon dioxide
 
 
 

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