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Acta Chimica Sinica ›› 2009, Vol. 67 ›› Issue (23): 2662-2668. Previous Articles     Next Articles

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二氧化碳-水混合体系的相平衡和汽-液-液三相点研究

付 东*，刘建岷，杨 传   

  1. (华北电力大学环境科学与工程学院 保定 071003)
  • 投稿日期:2009-04-06 修回日期:2009-07-06 发布日期:2009-10-11
  • 通讯作者: 付东 E-mail:fudong@tsinghua.org.cn
  • 基金资助:

    国家自然科学基金(No.20606009); 教育部新世纪优秀人才支持计划(No.06-0206)

Phase Equilibria and Vapor-liquid-liquid Triple Point for Mixture of CO2 and Water

Fu, Dong*，Liu, Jianmin，Yang, Zhuan   

  1. (School of Environmental Science and Engineering, North China Electric Power University, Baoding 071003)
  • Received:2009-04-06 Revised:2009-07-06 Published:2009-10-11

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An equation of state applicable to the phase behavior of a CO2-water binary mixture was established based on the perturbed-chain statistical associating fluid theory (PC-SAFT). The binary interaction parameter was regressed by fitting to the experimental data of vapor-liquid and liquid-liquid equilibria, and the correlation agreed well with experiments. The temperature and pressure ranges for vapor-liquid-liquid three phase equilibria of the CO2-water binary mixture were predicted. The densities corresponding to the coexisting three phases of the triple points and their temperature and pressure dependence were determined.

Key words: font-family: "Times New Roman", mso-bidi-font-size: 12.0pt, mso-fareast-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">CO2-water, font-family: "Times New Roman", mso-bidi-font-size: 15.0pt, mso-fareast-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">phase equilibria, font-family: "Times New Roman", mso-bidi-font-size: 12.0pt, mso-fareast-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">vapor-liquid-liquid triple point, PC-SAFT