A Cubic Equation of State with a Repulsion Term

Lihang Bai; Yiran Wang; Maogang He; Ying Zhang; Xiangyang Liu

doi:10.1016/j.fluid.2023.114014

A Cubic Equation of State with a Repulsion Term

Lihang Bai
, Yiran Wang
, Maogang He
, Ying Zhang
, Xiangyang Liu

School of Energy and Power Engineering

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

2 Scopus citations

Abstract

A new cubic equation of state (EoS) was proposed to address the lack of repulsion terms in conventional cubic EoSs, with a molar critical compressibility factor Z_c = 0.273 and suitable for most molecular fluids. Similar to Soave-Redlich-Kwong (SRK) EoS, its α-function is related to the fluids’ acentric factors by fitting with 44 molecular fluids. Differently, the new EoS can pass the α-consistency test, confirming the robustness across all temperatures. With only three parameters (a_c, b, m) to be determined, it is as convenient as the SRK EoS in application. But it is more accurate - tested against experimental data - for both single and multi-component fluids than SRK EoS.

Original language	English
Article number	114014
Journal	Fluid Phase Equilibria
Volume	578
DOIs	https://doi.org/10.1016/j.fluid.2023.114014
State	Published - Mar 2024

Keywords

Cubic EoS
Molecular fluids
Repulsion

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10.1016/j.fluid.2023.114014

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title = "A Cubic Equation of State with a Repulsion Term",

abstract = "A new cubic equation of state (EoS) was proposed to address the lack of repulsion terms in conventional cubic EoSs, with a molar critical compressibility factor Zc = 0.273 and suitable for most molecular fluids. Similar to Soave-Redlich-Kwong (SRK) EoS, its α-function is related to the fluids{\textquoteright} acentric factors by fitting with 44 molecular fluids. Differently, the new EoS can pass the α-consistency test, confirming the robustness across all temperatures. With only three parameters (ac, b, m) to be determined, it is as convenient as the SRK EoS in application. But it is more accurate - tested against experimental data - for both single and multi-component fluids than SRK EoS.",

keywords = "Cubic EoS, Molecular fluids, Repulsion",

author = "Lihang Bai and Yiran Wang and Maogang He and Ying Zhang and Xiangyang Liu",

note = "Publisher Copyright: {\textcopyright} 2023",

year = "2024",

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doi = "10.1016/j.fluid.2023.114014",

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TY - JOUR

T1 - A Cubic Equation of State with a Repulsion Term

AU - Bai, Lihang

AU - Wang, Yiran

AU - He, Maogang

AU - Zhang, Ying

AU - Liu, Xiangyang

PY - 2024/3

Y1 - 2024/3

N2 - A new cubic equation of state (EoS) was proposed to address the lack of repulsion terms in conventional cubic EoSs, with a molar critical compressibility factor Zc = 0.273 and suitable for most molecular fluids. Similar to Soave-Redlich-Kwong (SRK) EoS, its α-function is related to the fluids’ acentric factors by fitting with 44 molecular fluids. Differently, the new EoS can pass the α-consistency test, confirming the robustness across all temperatures. With only three parameters (ac, b, m) to be determined, it is as convenient as the SRK EoS in application. But it is more accurate - tested against experimental data - for both single and multi-component fluids than SRK EoS.

AB - A new cubic equation of state (EoS) was proposed to address the lack of repulsion terms in conventional cubic EoSs, with a molar critical compressibility factor Zc = 0.273 and suitable for most molecular fluids. Similar to Soave-Redlich-Kwong (SRK) EoS, its α-function is related to the fluids’ acentric factors by fitting with 44 molecular fluids. Differently, the new EoS can pass the α-consistency test, confirming the robustness across all temperatures. With only three parameters (ac, b, m) to be determined, it is as convenient as the SRK EoS in application. But it is more accurate - tested against experimental data - for both single and multi-component fluids than SRK EoS.

KW - Cubic EoS

KW - Molecular fluids

KW - Repulsion

UR - https://www.scopus.com/pages/publications/85180364800

U2 - 10.1016/j.fluid.2023.114014

DO - 10.1016/j.fluid.2023.114014

M3 - 文章

AN - SCOPUS:85180364800

SN - 0378-3812

VL - 578

JO - Fluid Phase Equilibria

JF - Fluid Phase Equilibria

M1 - 114014

ER -

A Cubic Equation of State with a Repulsion Term

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Keywords

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