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Calculation of gas-liquid critical curves for binary systems containing methane

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Abstract

The critical curves for binary systems of methane combined with nitrogen, carbon monoxide, carbon dioxide, ethane, propane, butane and water at temperatures from 125 K to 650 K and pressures from 3.5 MPa to 250 MPa were calculated by using Heilig-Franck equation of state. This equation of state contains a repulsion term and an attraction term for intermolecular interaction. With pairwise combination rules for these potentials, three adjustable parameters are needed. The results showed that the critical curves of the former six binary systems belonged to type I, and CH4+H2O system belonged to type III. The calculated data were compared with the experimental data, which yielded good results for the pressure-temperature, pressure-composition and temperature-composition behaviors of the seven systems. Moreover, the values of the adjustable parameters were obtained from the calculation of the critical curves. They can also be used for other relevant calculation.

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Authors and Affiliations

  1. School of Sciences, Tianjin University, Tianjin, 300072, China

    Rongjiao Zhu  (朱荣娇), Hongling Li  (李洪玲), Jishuang Hao  (郝纪双), Hesong Li  (李贺松) & Yiling Tian  (田宜灵)

  2. School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, China

    Hongling Li  (李洪玲)

Authors
  1. Rongjiao Zhu  (朱荣娇)
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  2. Hongling Li  (李洪玲)
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  3. Jishuang Hao  (郝纪双)
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  4. Hesong Li  (李贺松)
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  5. Yiling Tian  (田宜灵)
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Corresponding author

Correspondence to Yiling Tian  (田宜灵).

Additional information

Supported by National Natural Science Foundation of China (No. 20476071).

ZHU Rongjiao, born in 1982, female, Dr, lecture.

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Zhu, R., Li, H., Hao, J. et al. Calculation of gas-liquid critical curves for binary systems containing methane. Trans. Tianjin Univ. 15, 276–282 (2009). https://doi.org/10.1007/s12209-009-0049-7

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  • DOI: https://doi.org/10.1007/s12209-009-0049-7

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