化学
热力学
状态方程
立方函数
超临界流体
蒸汽压
三元运算
压缩系数
范德瓦尔斯力
热容
摩尔分数
弗洛里-哈金斯解理论
汽化焓
压缩性
焓
物理化学
有机化学
计算机科学
物理
数学
数学分析
分子
程序设计语言
聚合物
作者
Ali Haghtalab,Mohamad Javad Kamali,Seyed Hossein Mazloumi,Peyman Mahmoodi
标识
DOI:10.1016/j.fluid.2010.03.029
摘要
A new three-parameter cubic equation of state is presented by combination of a modified attractive term and van der Waals repulsive expression. Also a new alpha function for the attractive parameter of the new EOS is proposed. The new coefficients of alpha function and the other parameters of the attractive term are adjusted using the data of the saturated vapor pressure and liquid density of almost 60 pure compounds including heavy hydrocarbons. The new EOS is adopted for prediction of the various thermophysical properties of pure compounds such as saturated and supercritical volume, enthalpy of vaporization, compressibility factor, heat capacity and sound velocity. Following successful application of the new EOS for the pure components, using vdW one-fluid mixing rules, the new EOSs are applied to prediction of the bubble pressure and vapor mole fraction of the several binary and ternary mixtures. The accuracy of the new EOS for phase equilibrium calculation is demonstrated by comparison of the results of the present EOSs with the PT, PR, GPR and SRK cubic EOSs.
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