An equation of state for solid-liquid-vapor equilibrium applied to gas processing and natural gas liquefaction

作者：Stringari Paolo^*; Campestrini Marco; Coquelet Christophe; Arpentinier Philippe

来源：Fluid Phase Equilibria, 2014, 362: 258-267.

DOI：10.1016/j.fluid.2013.10.020

• Natural gas
• LNG
• Solid-liquid equilibrium
• Solid-vapor equilibrium
• Equation of state

The analytical equation of state for the representation of solid, liquid, and vapor (SLV-EoS), proposed by Yokozeki, has been applied to the representation of phase equilibrium of substances involved in gas processing and in the natural gas liquefaction process. A new procedure for the parameters regression has been set up in order to achieve a better representation of phase equilibrium. This new procedure has been applied for obtaining new parameters for the original SLV-EoS equation, with the van der Waals attractive term. Different attractive terms have also been studied, in order to achieve an optimized representation for solid-liquid, solid-vapor, and liquid-vapor equilibrium of pure substances. The obtained equations have been used for representing phase equilibrium of carbon dioxide, methane, ethane, and propane in a wide range of temperature and pressure. The new equations have also been applied to the description of phase equilibrium, involving also solid phases, of the mixtures methane-carbon dioxide, ethane-carbon dioxide, and propane-carbon dioxide.

• 出版日期2014-1-25