A crossover cubic equation of state near to and far from the critical region

Yongjin Lee; Moon Sam Shin; Jong Kee Yeo; Hwayong Kim

doi:10.1016/j.jct.2007.02.001

A crossover cubic equation of state near to and far from the critical region

Yongjin Lee, Moon Sam Shin, Jong Kee Yeo, Hwayong Kim

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

In this research, we use the Patel-Teja (PT) cubic equation of state [N.C. Patel, A.S. Teja, Chem. Eng. Sci. 37 (1982) 463-473.] and develop a crossover cubic model near to and far from the critical region, which incorporates the scaling laws asymptotically close to the critical point and it transformed into original classical cubic equations of state far away from the critical point. This equation of state is used to calculate thermodynamic properties of pure systems (carbon dioxide, normal alkanes from methane to heptane). We show that, over a wide range of states, the equation of state yields the saturated vapour pressure data and the saturated density data with a much better accuracy than the original PT equation of state.

Original language	English
Pages (from-to)	1257-1263
Number of pages	7
Journal	Journal of Chemical Thermodynamics
Volume	39
Issue number	9
DOIs	https://doi.org/10.1016/j.jct.2007.02.001
State	Published - Sep 2007
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the BK21 project of Ministry of Education of Korea and by the National Laboratory (NRL) Programme.

Keywords

Carbon dioxide
Critical state
Crossover
Equation of state
Patel-Teja

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10.1016/j.jct.2007.02.001

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abstract = "In this research, we use the Patel-Teja (PT) cubic equation of state [N.C. Patel, A.S. Teja, Chem. Eng. Sci. 37 (1982) 463-473.] and develop a crossover cubic model near to and far from the critical region, which incorporates the scaling laws asymptotically close to the critical point and it transformed into original classical cubic equations of state far away from the critical point. This equation of state is used to calculate thermodynamic properties of pure systems (carbon dioxide, normal alkanes from methane to heptane). We show that, over a wide range of states, the equation of state yields the saturated vapour pressure data and the saturated density data with a much better accuracy than the original PT equation of state.",

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author = "Yongjin Lee and Shin, {Moon Sam} and Yeo, {Jong Kee} and Hwayong Kim",

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doi = "10.1016/j.jct.2007.02.001",

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AU - Lee, Yongjin

AU - Shin, Moon Sam

AU - Yeo, Jong Kee

AU - Kim, Hwayong

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A crossover cubic equation of state near to and far from the critical region

Abstract

Bibliographical note

Keywords

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