### Abstract

A thermodynamic property model with new mixing rules using the Helmholtz free energy is presented for the binary mixture of methane and hydrogen sulfide based on experimental P _{ρ} T _{x} data, vapor-liquid equilibrium data, and critical-point properties. The binary mixture of methane and hydrogen sulfide shows vapor-liquid-liquid equilibria and a divergence of the critical curve. The model represents the existing experimental data accurately and describes the complicated behavior of the phase equilibria and the critical curve. The uncertainty in density calculations is estimated to be 2%. The uncertainty in vapor-liquid equilibrium calculations is 0.02 mole fraction in the liquid phase and 0.03 mole fraction in the vapor phase. The model also represents the critical points with an uncertainty of 2% in temperature and 3% in pressure. Graphical and statistical comparisons between experimental data and the available thermodynamic models are discussed.

Original language | English |
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Pages (from-to) | 1303-1325 |

Number of pages | 23 |

Journal | International Journal of Thermophysics |

Volume | 26 |

Issue number | 5 |

DOIs | |

Publication status | Published - Sep 1 2005 |

Externally published | Yes |

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### All Science Journal Classification (ASJC) codes

- Condensed Matter Physics

### Cite this

*International Journal of Thermophysics*,

*26*(5), 1303-1325. https://doi.org/10.1007/s10765-005-8090-9

**A thermodynamic property model for the binary mixture of methane and hydrogen sulfide.** / Sakoda, N.; Uematsu, M.

Research output: Contribution to journal › Article

*International Journal of Thermophysics*, vol. 26, no. 5, pp. 1303-1325. https://doi.org/10.1007/s10765-005-8090-9

}

TY - JOUR

T1 - A thermodynamic property model for the binary mixture of methane and hydrogen sulfide

AU - Sakoda, N.

AU - Uematsu, M.

PY - 2005/9/1

Y1 - 2005/9/1

N2 - A thermodynamic property model with new mixing rules using the Helmholtz free energy is presented for the binary mixture of methane and hydrogen sulfide based on experimental P ρ T x data, vapor-liquid equilibrium data, and critical-point properties. The binary mixture of methane and hydrogen sulfide shows vapor-liquid-liquid equilibria and a divergence of the critical curve. The model represents the existing experimental data accurately and describes the complicated behavior of the phase equilibria and the critical curve. The uncertainty in density calculations is estimated to be 2%. The uncertainty in vapor-liquid equilibrium calculations is 0.02 mole fraction in the liquid phase and 0.03 mole fraction in the vapor phase. The model also represents the critical points with an uncertainty of 2% in temperature and 3% in pressure. Graphical and statistical comparisons between experimental data and the available thermodynamic models are discussed.

AB - A thermodynamic property model with new mixing rules using the Helmholtz free energy is presented for the binary mixture of methane and hydrogen sulfide based on experimental P ρ T x data, vapor-liquid equilibrium data, and critical-point properties. The binary mixture of methane and hydrogen sulfide shows vapor-liquid-liquid equilibria and a divergence of the critical curve. The model represents the existing experimental data accurately and describes the complicated behavior of the phase equilibria and the critical curve. The uncertainty in density calculations is estimated to be 2%. The uncertainty in vapor-liquid equilibrium calculations is 0.02 mole fraction in the liquid phase and 0.03 mole fraction in the vapor phase. The model also represents the critical points with an uncertainty of 2% in temperature and 3% in pressure. Graphical and statistical comparisons between experimental data and the available thermodynamic models are discussed.

UR - http://www.scopus.com/inward/record.url?scp=27844450611&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=27844450611&partnerID=8YFLogxK

U2 - 10.1007/s10765-005-8090-9

DO - 10.1007/s10765-005-8090-9

M3 - Article

AN - SCOPUS:27844450611

VL - 26

SP - 1303

EP - 1325

JO - International Journal of Thermophysics

JF - International Journal of Thermophysics

SN - 0195-928X

IS - 5

ER -